April 26, 2011, NEC Chemical Industry Co., Ltd. announced that the lithium iron phosphate LiFePO4 (Lithium Iron Phosphate) on the basis of developing new materials, cathode material, lithium iron phosphate material reduces the resistance, extended lithium-ion rechargeable inspiron e1405 battery ，inspiron 15 battery working life.
But the material and electrical Chemical Co., Ltd. is located in Tsu City, Mie Prefecture, Japan (Tsu City, Mie Prefecture) of the SEI Group, the results of cooperation, which focused on lithium-ion rechargeable battery materials research and development.
Currently, a large proportion of the lithium-ion rechargeable batteries,inspiron e1405 battery ，inspiron 15 battery are used lithium iron phosphate LiFePO4 as cathode material. The material has many advantages. The first is a high energy density, theoretical capacity of 170 mAh / g, the actual specific capacity can reach 140 mAh / g (0.2C, 25 ° C conditions) or more. Followed by the safety of lithium iron phosphate does not contain harmful heavy metals, is currently the highest safety of lithium-ion battery cathode materials. Third, no memory effect, to avoid the same as a crystalline nickel batteries. The fourth is charged faster.
Lithium iron phosphate cathode material on the battery life to look at. The material has a higher lattice stability of lithium-ion lattice embedded rarely and the impact of prolapse, reversible good condition at 100% DOD, you can charge and discharge more than 2000 times; but the material of lithium iron phosphate relatively low electron-ion conductivity, the larger the current strength of charge - discharge operation will still be under the influence life.
Chemical Industry Co., Ltd. in accordance with electrical point of view, for automotive applications, the selection of the material of lithium iron phosphate batteries,inspiron 1525 battery , inspiron 1526 battery the charge - discharge can increase the total life cycle. If the use of lithium iron phosphate on the basis of the development of new materials, the battery charge - discharge cycle life can reach or exceed the total number of alternative non-ferrous base level of the battery cathode material.
The Chemical Industry Co., Ltd. Electric lithium iron phosphate added acetylene carbon black (Acetylene Black) and carbon nanofibers (Carbon Nanofiber) as a conductive modified ingredients. Mainly by calcium carbide acetylene acetylene carbon black (Acetylene) by thermal decomposition (Pyrolytically Decomposing) method is made. Curing the mixture of three materials, the conductive path can be arranged in accordance with established goal setting, thereby reducing the resistance characteristics. And the existing iron-based cathode material, the new material resistivity decreased by about 30%.
Figure 1 is a novel cathode material in the transmission electron microscope (Transmission Electron Microscope) image under observation. Punctate distribution area for the lithium iron phosphate; carbon nano-fiber distribution lines in the diagram above. As each lap of carbon fiber (Lap Over), presented the appearance of central tendency. Acetylene carbon black is not displayed on the map, because it is too small, attached to the top of the carbon nanofibers.
Manufacturing process exclusive inspiron 1525 battery , inspiron 1526 battery development deal with the details of the company has not yet announced. However, comparison of existing iron-based cathode material, new material during processing without the need for shredding. In addition, the treatment process also does not require additional special equipment, so the cost increase is not obvious.
Resistivity decreases, the waste heat and other factors that affect the battery life to a certain inhibition, which can achieve the work of iron-based cathode materials with other cathode materials for life equal to or even beyond, for example, manganese (Manganese-based) materials, ternary complex materials (such as copper - tin - antimony, Cu-Sn-Sb) and other cathode materials.
To work at the end of the battery life may reduce the capacity for performance from the decay of 30%. Such as car batteries and other large lithium-ion rechargeable battery up to charge - discharge inspiron 1545 battery ，inspiron 1440 battery cycle life of the total number of current between about 2000-3000. Chemical Industry Co., Ltd. NEC, however that the life of the new cathode material and even more than the above data. In the assessment phase, and the electrode with the use of new materials is a common carbon-based negative electrode materials.
Currently, the company is working to car manufacturers, electronic component manufacturers and inspiron 1545 battery ，inspiron 1440 battery power companies to provide new cathode materials related to the performance of new materials to carry out assessments.
The electronics news is from http://www.electronicsnews.me/japan-to-develop-a-composite-material-for-lithium-battery/
2011年5月25日星期三
Replacing Battery Become a Thing
Battery technology hasn't kept pace with advancements in portable electronics, but the race is on to fix this. One revolutionary concept being pursued by a team of researchers in New Zealand involves creating "wearable energy harvesters" capable of converting movement from humans or found in nature into inspiron e1405 battery ，inspiron 15 battery power.
A class of variable capacitor generators known as "dielectric elastomer generators" (DEGs) shows great potential for wearable energy harvesting. In fact, researchers at the Auckland Bioengineering Institute's Biomimetics Lab believe DEGs may enable light, soft, form-fitting, silent energy harvesters with excellent mechanical properties that match human muscle. They describe their findings in the American Institute of Physics' journal Applied Physics Letters.
"Imagine soft generators that produce energy by flexing and stretching as they ride ocean waves or sway in the breeze like a tree," says Thomas McKay, a Ph.D. candidate working on soft generator research at the Biomimetics Lab. "We've developed a low-cost power generator with an unprecedented combination of softness, flexibility, and low mass. These characteristics provide an opportunity to harvest energy from environmental sources with much greater simplicity than previously possible."
Dielectric elastomers, often referred to as artificial muscles, are stretchy materials that are capable of producing energy when deformed. In the past, artificial muscle generators required bulky, rigid, and expensive external electronics.
"Our team eliminated the need for this external circuitry by integrating flexible electronics -- dielectric elastomer switches -- directly onto the artificial muscles themselves. One of the most exciting features of the generator is that it's so simple; it simply consists of rubber membranes and carbon grease mounted in a frame," McKay explains.
McKay and his colleagues at the Biomimetics Lab are working to create soft dexterous machines that comfortably interface with living creatures and nature in general. The soft generator is another step toward fully soft devices; it could potentially be unnoticeably incorporated into clothing and harvest electricity from human movement. When this happens, worrying about the inspiron e1405 battery ，inspiron 15 battery powering your cell phone or other portable electronics dying on you will become a thing of the past. And as an added bonus, this should help keep batteries out of landfills.
A class of variable capacitor generators known as "dielectric elastomer generators" (DEGs) shows great potential for wearable energy harvesting. In fact, researchers at the Auckland Bioengineering Institute's Biomimetics Lab believe DEGs may enable light, soft, form-fitting, silent energy harvesters with excellent mechanical properties that match human muscle. They describe their findings in the American Institute of Physics' journal Applied Physics Letters.
"Imagine soft generators that produce energy by flexing and stretching as they ride ocean waves or sway in the breeze like a tree," says Thomas McKay, a Ph.D. candidate working on soft generator research at the Biomimetics Lab. "We've developed a low-cost power generator with an unprecedented combination of softness, flexibility, and low mass. These characteristics provide an opportunity to harvest energy from environmental sources with much greater simplicity than previously possible."
Dielectric elastomers, often referred to as artificial muscles, are stretchy materials that are capable of producing energy when deformed. In the past, artificial muscle generators required bulky, rigid, and expensive external electronics.
"Our team eliminated the need for this external circuitry by integrating flexible electronics -- dielectric elastomer switches -- directly onto the artificial muscles themselves. One of the most exciting features of the generator is that it's so simple; it simply consists of rubber membranes and carbon grease mounted in a frame," McKay explains.
McKay and his colleagues at the Biomimetics Lab are working to create soft dexterous machines that comfortably interface with living creatures and nature in general. The soft generator is another step toward fully soft devices; it could potentially be unnoticeably incorporated into clothing and harvest electricity from human movement. When this happens, worrying about the inspiron e1405 battery ，inspiron 15 battery powering your cell phone or other portable electronics dying on you will become a thing of the past. And as an added bonus, this should help keep batteries out of landfills.
2011年5月22日星期日
U.S. CPSC issued a public warning on the button batteries
Recently, the U.S. Consumer Product Safety Commission (CPSC) survey found that consumer goods, toys or small button batteries in the greater security risks exist, and to report thereon to the public warning.
According to the National Poison Center data released in recent years, caused by button inspiron e1505 battery , inspiron 1501 battery ingestion cases of serious complications has increased sevenfold. Each button battery ingestion more than 3,000 since the accident, most of them children, button batteries become children of the "invisible killer." Sometimes swallowed the battery through the intestinal tract, but most of the time, the battery will be stuck in the throat, leading to the release of sodium hydroxide, resulting in severe chemical burn accident. Eating or swallowing such small batteries may also cause long-term health problems. For example, the battery can affect intestinal motility, causing tissue burns, internal bleeding, tracheal perforation, damage to the vocal cords and other serious health problems.
Swallowing battery events often occur in less than four years old children or older people. The reason is that children are often out of curiosity and from games, toys, calculators, remote controls and other items removed button batteries, while older people are mistaken for pills and swallowed. To do this, CPSC to the electronics industry and battery manufacturers to issue reminders, urging the development of industry standards or warnings affixed to the inspiron e1505 battery , inspiron 1501 battery to prevent the occurrence of unintentional swallowing the battery: 1, discard button battery to be cautious; 2, do not Let children play with button batteries, button batteries and so far away from children; 3, hearing aids and hearing aid users to ensure that the battery away from children; 4, to prevent accidents, do not expose the battery to the mouth; 5, to confirm when the ingestion of tablets, so as not to button batteries mistaken for pills or tablets and swallowed.
U.S. Zengyin toys containing button batteries,solar radio emergency,inspiron e1705 battery while more than 1 million of toys recalled, China's exports to Canada and the United States because the button batteries toy products have been recalled exposure. Therefore, the inspection and quarantine experts have warned that companies should ensure product quality and ensure the button batteries inside the product will not easily fall off. In addition, industry associations should develop uniform standards as soon as possible, affix warning labels on products.
According to the National Poison Center data released in recent years, caused by button inspiron e1505 battery , inspiron 1501 battery ingestion cases of serious complications has increased sevenfold. Each button battery ingestion more than 3,000 since the accident, most of them children, button batteries become children of the "invisible killer." Sometimes swallowed the battery through the intestinal tract, but most of the time, the battery will be stuck in the throat, leading to the release of sodium hydroxide, resulting in severe chemical burn accident. Eating or swallowing such small batteries may also cause long-term health problems. For example, the battery can affect intestinal motility, causing tissue burns, internal bleeding, tracheal perforation, damage to the vocal cords and other serious health problems.
Swallowing battery events often occur in less than four years old children or older people. The reason is that children are often out of curiosity and from games, toys, calculators, remote controls and other items removed button batteries, while older people are mistaken for pills and swallowed. To do this, CPSC to the electronics industry and battery manufacturers to issue reminders, urging the development of industry standards or warnings affixed to the inspiron e1505 battery , inspiron 1501 battery to prevent the occurrence of unintentional swallowing the battery: 1, discard button battery to be cautious; 2, do not Let children play with button batteries, button batteries and so far away from children; 3, hearing aids and hearing aid users to ensure that the battery away from children; 4, to prevent accidents, do not expose the battery to the mouth; 5, to confirm when the ingestion of tablets, so as not to button batteries mistaken for pills or tablets and swallowed.
U.S. Zengyin toys containing button batteries,solar radio emergency,inspiron e1705 battery while more than 1 million of toys recalled, China's exports to Canada and the United States because the button batteries toy products have been recalled exposure. Therefore, the inspection and quarantine experts have warned that companies should ensure product quality and ensure the button batteries inside the product will not easily fall off. In addition, industry associations should develop uniform standards as soon as possible, affix warning labels on products.
2011年5月19日星期四
Laptop Battery for Personal
It is interesting to observe that batteries cared for by a single user generally last longer than those operating in an open fleet system where everyone has access but no one is responsible. A personal user is one who operates a mobile phone, a laptop or digital camera for business or pleasure. He or she usually cares for the battery and makes all efforts to follow the recommended guidelines. With time, the user gets to know the inspiron e1405 battery ，inspiron 15 battery like a good friend, and critical failures are rare because the owner adjusts to the changing condition, lowers expectations and replaces the pack when it becomes a nuisance.
The desire to care for the batteries is not witnessed among fleet users. The packs belong to a pool of unknown batteries and operate in a sharing arrangement. While an individual user can live with reduced runtime, the fleet operators have little attachment to the battery and show no patience with anything that is less than perfect. They grab a battery from the charger and expect it to last through the shift. At the end of the day, the battery is plugged into the charger again, ready for the next user. Having serviced batteries for fleet users for many years, I noticed shorter service life on fleet packs than those for personal use.
How can fleet batteries be made to last longer? I made an interesting observation on inspiron e1405 battery ，inspiron 15 battery life in comparing two defense organizations, the US Army and the Dutch Army, both of which I had the pleasure of visiting. The armies in question use fleet batteries and deploy them similarly with the following exception.
The US Army issues batteries without a maintenance program. If the battery fails, another pack is released, no questions asked. Little or no care is taken and the failure rate is high. The Dutch Army, on the other hand, has moved away from the open fleet system by making the soldiers responsible for their batteries. The entrusted packs become part of their personal belongings, similar to food and clothing. The army made the change to reduce operational costs and improve reliability.
The results are startling. Since the Dutch Army adapted this new regime, the failure rate has dropped considerably and inspiron e1405 battery ，inspiron 15 battery performance has increased. Unexpected downtime has almost been eliminated.
I should mention that the Dutch Army used nickel-cadmium batteries at the time of the study. Each pack received periodic maintenance on a Cadex battery analyzer to prolong service life. Batteries that did not meet the required 80 percent target capacity were reconditioned, and those failing to meet the target setting were replaced. Meanwhile, the US Army had switched to nickel-metal-hydride, a chemistry that is known to offer higher capacity but shorter service life. Today, both armies use lithium-ion on their new equipment.
Public safety organizations use a mix of NiCd, NiMH and Li-ion. Checking with a fire department to find out which chemistry works best, I learned that Li-ion is indeed superior. After 15 months of use, the Li-ion batteries tested on a Cadex battery analyzer still showed 92–95 percent capacity, and the users are confident that the batteries can be used reliably for two to three full shifts on a single charge. Such performance would not have been possible with nickel-based batteries. But battery breakdowns still occur and the failure rate continues to be relatively high in fleet use. This might be user-related, and the Dutch Army model of assigning a inspiron 1525 battery , inspiron 1526 battery as a personal belonging might solve this problem.
The lighter weight and longer runtime of Li-ion also offers noticeable advantages for power tools. Stores say that Li-ion batteries,inspiron 1525 battery , inspiron 1526 battery generate fewer returns than nickel-based packs, and this is in part due to the protection circuit that prevents reverse polarization on overload. Medical instruments are also switching to Li-ion but regulatory conditions make the change cumbersome. Bureaucracy can indeed stifle new technology rather than promote it.
The desire to care for the batteries is not witnessed among fleet users. The packs belong to a pool of unknown batteries and operate in a sharing arrangement. While an individual user can live with reduced runtime, the fleet operators have little attachment to the battery and show no patience with anything that is less than perfect. They grab a battery from the charger and expect it to last through the shift. At the end of the day, the battery is plugged into the charger again, ready for the next user. Having serviced batteries for fleet users for many years, I noticed shorter service life on fleet packs than those for personal use.
How can fleet batteries be made to last longer? I made an interesting observation on inspiron e1405 battery ，inspiron 15 battery life in comparing two defense organizations, the US Army and the Dutch Army, both of which I had the pleasure of visiting. The armies in question use fleet batteries and deploy them similarly with the following exception.
The US Army issues batteries without a maintenance program. If the battery fails, another pack is released, no questions asked. Little or no care is taken and the failure rate is high. The Dutch Army, on the other hand, has moved away from the open fleet system by making the soldiers responsible for their batteries. The entrusted packs become part of their personal belongings, similar to food and clothing. The army made the change to reduce operational costs and improve reliability.
The results are startling. Since the Dutch Army adapted this new regime, the failure rate has dropped considerably and inspiron e1405 battery ，inspiron 15 battery performance has increased. Unexpected downtime has almost been eliminated.
I should mention that the Dutch Army used nickel-cadmium batteries at the time of the study. Each pack received periodic maintenance on a Cadex battery analyzer to prolong service life. Batteries that did not meet the required 80 percent target capacity were reconditioned, and those failing to meet the target setting were replaced. Meanwhile, the US Army had switched to nickel-metal-hydride, a chemistry that is known to offer higher capacity but shorter service life. Today, both armies use lithium-ion on their new equipment.
Public safety organizations use a mix of NiCd, NiMH and Li-ion. Checking with a fire department to find out which chemistry works best, I learned that Li-ion is indeed superior. After 15 months of use, the Li-ion batteries tested on a Cadex battery analyzer still showed 92–95 percent capacity, and the users are confident that the batteries can be used reliably for two to three full shifts on a single charge. Such performance would not have been possible with nickel-based batteries. But battery breakdowns still occur and the failure rate continues to be relatively high in fleet use. This might be user-related, and the Dutch Army model of assigning a inspiron 1525 battery , inspiron 1526 battery as a personal belonging might solve this problem.
The lighter weight and longer runtime of Li-ion also offers noticeable advantages for power tools. Stores say that Li-ion batteries,inspiron 1525 battery , inspiron 1526 battery generate fewer returns than nickel-based packs, and this is in part due to the protection circuit that prevents reverse polarization on overload. Medical instruments are also switching to Li-ion but regulatory conditions make the change cumbersome. Bureaucracy can indeed stifle new technology rather than promote it.
Holiday Laptop Buying Guide
A lot of individuals select to acquire a laptop computer online, in which consumers can discover a wider assortment and typically reduce prices. Which is fine, but you truly shouldn’t buy a fresh computer sight unseen in the event you can prevent it. Compose down the names of a few of the types you are thinking about, together with a couple of notes about why they caught your eye, and head to your nearby big-box electronics keep. See in the event the retailer has show models of any in the systems you’re taking into consideration, or a minimum of very comparable models through the exact same manufacturer. Check out the keyboard–can you type simply on it? May be the touchpad a soreness to make use of? Does the display screen search great? When the laptop computer you want to acquire includes a glossy display screen, look at other types with glossy screens and establish regardless of whether your present recipient may favor that appear more than a matte, antiglare finish.
Decide on up the laptop computer with long life latitude d620 battery ，latitude d820 battery . you would like to buy, and assess its heft. Near the lid and see if your dimension is something that the recipient can match into their picked bag (do not really place it within a bag, naturally, except you desire safety throughout you). Bear in mind that several show notebooks in stores possess the battery removed, which helps make them look substantially lighter.
After you have a experience for your preferred laptop (or even a very comparable one), it is possible to go again property and get on the web with self-confidence. If you’re purchasing inside a brick-and-mortar keep, you might wish to request when the retailer has any sales coming up, or a minimum of phone around to various stores to find out which 1 has the best price tag. Or use your mobile phone to check out the newest rates on the web, and see how competitive the in-store price is. The shop you choose may possibly even match the price of the regional competitor.
Want A lot more RAM? Get it done By yourself
Let’s say the laptop computer you need to get arrives with 2GB of RAM but is expandable to 4GB. You could be able to save some cash in the event you upgrade the laptop’s RAM oneself rather than purchasing the 4GB choice in the manufacturer. See just how much more it fees to purchase the machine with 4GB, and evaluate that with acquiring the RAM individually and setting up it (the activity normally demands getting rid of only a few screws and about five minutes of the time–it’s simple to do on most laptops these days).
By natural means, you will need to do some homework first. Be sure that the laptop computer has an empty RAM socket (consult a revenue rep if you are not sure),high quality latitude d830 Battery ,inspiron 510m battery and discover out what sort and speed of RAM you may require. If all of this looks intimidating, it really is okay–just buy the system together with the RAM upgrade. Your time and stress are value only so much.
In case your present recipient will want a spare battery, select one that is specifically manufactured to function together with the certain design of laptop. It is not a poor notion to buy the battery appropriate once you purchase the PC–especially if you are purchasing on the internet, in which an extra battery may be supplied as an option. Use caution in the event you purchase an aftermarket battery from a producer besides the one which produced the laptop computer: A number of these batteries are priced truly effectively but shop significantly less power. Go through person reviews and remarks about third-party batteries meticulously to generate positive you happen to be not sacrificing battery life to preserve some bucks.
As for external optical drives, will not experience obligated to purchase a single from the producer of the laptop computer. Exterior optical drives that hook up via USB are usually universal, so search around for the good price.
Amid other laptop equipment, take into account purchasing a modest, wireless journey mouse. Even the most effective touchpad can be quite a nuisance occasionally, and also you can uncover a lot of compact, vostro 1700 battery ,latitude d630 battery-operated wireless mice that are especially intended to journey which has a laptop computer. If your gift recipient wants to use a laptop mouse on an airplane, nevertheless, be aware that wireless versions are forbidden–they’ll require a wired design for use in-flight.
It is possible to probably steer clear of shelling out income on a specialized laptop computer bag or carrying situation, which retail stores often mark up quite a lot. Except you encounter an incredible bargain, or you find a specific scenario created just for the unusually huge or little laptop computer you’re buying as well as the present recipient would love to have it, bide your time. Buying a really excellent bag can be a entire other approach in itself–don’t get a thing the individual will hate just because it’s expedient and handy.
When the salesperson tries to push other folderol on you, like screen wipes, blank discs, and added cables, just say “no thank you.” These things almost often have a large markup in shops, and you happen to be typically greater off purchasing them online in the event you do not believe you may need them right away.
When In Doubt, Go Quicker
If, following going hands-on with a handful of laptops, you are just not sure no matter whether your present recipient wants a more rapidly processor, devoted graphics, or even more RAM, get the leap. No one ever before complained that their laptop computer was too fast, but shelling out the next couple of many years doing work on an annoyingly sluggish laptop computer will get old within a hurry. Expect application to be at any time far more resource-hungry with time, too; the apps that the laptop’s new operator will use subsequent year will most likely be considered a tiny much more demanding than what they use these days. And if they have an HDTV or they’re taking into consideration getting a single in the future, an HDMI output on the laptop may can be found in handy.
Most consumer-advocacy groups will tell you not to get an extended warranty; such an arrangement is usually an excellent profit-maker for the producers and stores that offer it, and most consumers will not end up making use of it. Since they’re this kind of great profit generators, salespeople will usually offer you the hard sell about how you want some kind of laptop safety system or extended warranty.
Be cautious. Before you decide to even feel about signing up, request a lot of concerns. Inquire to view the specifics about what exactly is coated and what isn’t in writing–don’t simply rely upon the word with the salesperson.
Laptops really are a small distinct than most buyer electronics,solar radio emergency,inspiron e1705 battery and desktop computers in that they’re, nicely, highly moveable. People are inclined to throw them into bags, toss them close to, accidentally knock them off tables, leave them to get poked and prodded by kids, and place them on the kitchen table, begging to become victimized by a horrific spill. Know your gift recipient and the surroundings wherever they will use their laptop computer. If you believe they’ve a substantial probability of destroying their laptop in a couple of decades, you may wish to take into account the extended warranty. (When we very last surveyed readers on their satisfaction with prolonged warranties, we located that customers who bought them have been quite satisfied.) Also, laptop theft safety plans could be a great concept for college college students, that have their laptops lost or stolen with alarming regularity.
Decide on up the laptop computer with long life latitude d620 battery ，latitude d820 battery . you would like to buy, and assess its heft. Near the lid and see if your dimension is something that the recipient can match into their picked bag (do not really place it within a bag, naturally, except you desire safety throughout you). Bear in mind that several show notebooks in stores possess the battery removed, which helps make them look substantially lighter.
After you have a experience for your preferred laptop (or even a very comparable one), it is possible to go again property and get on the web with self-confidence. If you’re purchasing inside a brick-and-mortar keep, you might wish to request when the retailer has any sales coming up, or a minimum of phone around to various stores to find out which 1 has the best price tag. Or use your mobile phone to check out the newest rates on the web, and see how competitive the in-store price is. The shop you choose may possibly even match the price of the regional competitor.
Want A lot more RAM? Get it done By yourself
Let’s say the laptop computer you need to get arrives with 2GB of RAM but is expandable to 4GB. You could be able to save some cash in the event you upgrade the laptop’s RAM oneself rather than purchasing the 4GB choice in the manufacturer. See just how much more it fees to purchase the machine with 4GB, and evaluate that with acquiring the RAM individually and setting up it (the activity normally demands getting rid of only a few screws and about five minutes of the time–it’s simple to do on most laptops these days).
By natural means, you will need to do some homework first. Be sure that the laptop computer has an empty RAM socket (consult a revenue rep if you are not sure),high quality latitude d830 Battery ,inspiron 510m battery and discover out what sort and speed of RAM you may require. If all of this looks intimidating, it really is okay–just buy the system together with the RAM upgrade. Your time and stress are value only so much.
In case your present recipient will want a spare battery, select one that is specifically manufactured to function together with the certain design of laptop. It is not a poor notion to buy the battery appropriate once you purchase the PC–especially if you are purchasing on the internet, in which an extra battery may be supplied as an option. Use caution in the event you purchase an aftermarket battery from a producer besides the one which produced the laptop computer: A number of these batteries are priced truly effectively but shop significantly less power. Go through person reviews and remarks about third-party batteries meticulously to generate positive you happen to be not sacrificing battery life to preserve some bucks.
As for external optical drives, will not experience obligated to purchase a single from the producer of the laptop computer. Exterior optical drives that hook up via USB are usually universal, so search around for the good price.
Amid other laptop equipment, take into account purchasing a modest, wireless journey mouse. Even the most effective touchpad can be quite a nuisance occasionally, and also you can uncover a lot of compact, vostro 1700 battery ,latitude d630 battery-operated wireless mice that are especially intended to journey which has a laptop computer. If your gift recipient wants to use a laptop mouse on an airplane, nevertheless, be aware that wireless versions are forbidden–they’ll require a wired design for use in-flight.
It is possible to probably steer clear of shelling out income on a specialized laptop computer bag or carrying situation, which retail stores often mark up quite a lot. Except you encounter an incredible bargain, or you find a specific scenario created just for the unusually huge or little laptop computer you’re buying as well as the present recipient would love to have it, bide your time. Buying a really excellent bag can be a entire other approach in itself–don’t get a thing the individual will hate just because it’s expedient and handy.
When the salesperson tries to push other folderol on you, like screen wipes, blank discs, and added cables, just say “no thank you.” These things almost often have a large markup in shops, and you happen to be typically greater off purchasing them online in the event you do not believe you may need them right away.
When In Doubt, Go Quicker
If, following going hands-on with a handful of laptops, you are just not sure no matter whether your present recipient wants a more rapidly processor, devoted graphics, or even more RAM, get the leap. No one ever before complained that their laptop computer was too fast, but shelling out the next couple of many years doing work on an annoyingly sluggish laptop computer will get old within a hurry. Expect application to be at any time far more resource-hungry with time, too; the apps that the laptop’s new operator will use subsequent year will most likely be considered a tiny much more demanding than what they use these days. And if they have an HDTV or they’re taking into consideration getting a single in the future, an HDMI output on the laptop may can be found in handy.
Most consumer-advocacy groups will tell you not to get an extended warranty; such an arrangement is usually an excellent profit-maker for the producers and stores that offer it, and most consumers will not end up making use of it. Since they’re this kind of great profit generators, salespeople will usually offer you the hard sell about how you want some kind of laptop safety system or extended warranty.
Be cautious. Before you decide to even feel about signing up, request a lot of concerns. Inquire to view the specifics about what exactly is coated and what isn’t in writing–don’t simply rely upon the word with the salesperson.
Laptops really are a small distinct than most buyer electronics,solar radio emergency,inspiron e1705 battery and desktop computers in that they’re, nicely, highly moveable. People are inclined to throw them into bags, toss them close to, accidentally knock them off tables, leave them to get poked and prodded by kids, and place them on the kitchen table, begging to become victimized by a horrific spill. Know your gift recipient and the surroundings wherever they will use their laptop computer. If you believe they’ve a substantial probability of destroying their laptop in a couple of decades, you may wish to take into account the extended warranty. (When we very last surveyed readers on their satisfaction with prolonged warranties, we located that customers who bought them have been quite satisfied.) Also, laptop theft safety plans could be a great concept for college college students, that have their laptops lost or stolen with alarming regularity.
2011年5月18日星期三
Choose A Good Battery
With the diversification of the development of household appliances, laptop battery increasingly widespread use, in addition to flashlights, electronic watches, electric toys, remote control, walkman, radios, tape recorders, electric shavers and other common electronic apparatus, the digital gas meters, Auto-ignition water heater, digital cameras, MP3, car key remote keyless entry, laser pointer, computer input pen, and other new electrical appliances must be made in good performance batteries.
First, the common battery type, commonly known and routine application of
Chinese model of international standard model known as the daily application of standards
R03 R03 7 zinc-manganese dry battery clock, flashlight, remote control
Zinc-manganese dry battery R6 R6 5 clock, flashlight, R6P also be used for remote control
R14 R14 2 zinc-manganese dry battery flashlight, radio,
R20 R20 1 zinc-manganese dry battery flashlight, radio,
LR03 LR03 7 alkaline manganese battery electric toys, music players, tape recorders, electric shavers, remote controls, BP machine
LR6 LR6 5 alkaline manganese battery electric toys, music players, tape recorders, electric shavers, remote controls, BP machine. (Market, recently introduced digital Wang alkaline batteries suitable for digital cameras)
LR14 LR14 2 alkaline manganese battery electric toys, electric shavers, gas water heater
LR20 LR20 1 alkaline manganese battery electric toys, electric shavers, gas water heater
Note: 1, R, said cylindrical battery, L that is an alkaline liquid electrolyte batteries.
2, R6, R14, R20, after three models with S, C, P, after both have three types. If there is R6 R6S, R6C, R6P three. S expressed as a paste-type batteries, C batteries, said board for high-capacity, P is expressed as high-power board batteries.
3, S-type paste-type pavilion dv6000 battery y capacity is low, the battery end, easy to leak, but the price is cheap.
4, C-type (high capacity) battery for low current discharge method.
5, P-type (high power) the battery discharge capacity than the first two have greatly improved resistance to leakage performance of such batteries, and suitable for high current continuous discharge.
6, the capacity of alkaline batteries with the size of the previously mentioned 3 to 7 times the battery, and can be a continuous high-current discharge, with excellent resistance to leakage performance characteristics.
Battery precautions
1, electrical appliances and pavilion dv6000 battery contacts should be clean, wipe with a damp cloth when necessary, to be dried properly loaded according to the polarity mark. Recognized when you install the battery polarity ("+" and "-") the installation is very important, should the requirements of electrical installation with the instructions recommended by the battery; do not follow the specification requirements, will lead to equipment failure, damage to electrical appliances and / or battery.
If three or more than three batteries in series, in which an anti-polarity, reverse the battery is charged, the internal production of gas, the occurrence of venting and electrolyte leakage.
2 Do not mix old and new batteries, the same model but different types or brands of batteries Electrochemical do not mix, otherwise it would be a set of batteries in use in some of the battery over-discharge state, thereby increasing the possibility of leakage.
3, disposable or rechargeable battery recycling is not heated, or they may explode.
4, can not short-circuit the battery to avoid battery leakage or heat damage to the insulation packaging.
5, Do not disassemble the battery, do not heat the battery.
6, electrical appliances when not in a long time removing the vostro 1700 battery ,voatro 1510 battery, turn the power off after use so as not to place inside the battery to discharge caused by leakage of adverse chemical reaction.
7, and used batteries should not be thrown away, put in as much as possible separated from other garbage.
First, the common battery type, commonly known and routine application of
Chinese model of international standard model known as the daily application of standards
R03 R03 7 zinc-manganese dry battery clock, flashlight, remote control
Zinc-manganese dry battery R6 R6 5 clock, flashlight, R6P also be used for remote control
R14 R14 2 zinc-manganese dry battery flashlight, radio,
R20 R20 1 zinc-manganese dry battery flashlight, radio,
LR03 LR03 7 alkaline manganese battery electric toys, music players, tape recorders, electric shavers, remote controls, BP machine
LR6 LR6 5 alkaline manganese battery electric toys, music players, tape recorders, electric shavers, remote controls, BP machine. (Market, recently introduced digital Wang alkaline batteries suitable for digital cameras)
LR14 LR14 2 alkaline manganese battery electric toys, electric shavers, gas water heater
LR20 LR20 1 alkaline manganese battery electric toys, electric shavers, gas water heater
Note: 1, R, said cylindrical battery, L that is an alkaline liquid electrolyte batteries.
2, R6, R14, R20, after three models with S, C, P, after both have three types. If there is R6 R6S, R6C, R6P three. S expressed as a paste-type batteries, C batteries, said board for high-capacity, P is expressed as high-power board batteries.
3, S-type paste-type pavilion dv6000 battery y capacity is low, the battery end, easy to leak, but the price is cheap.
4, C-type (high capacity) battery for low current discharge method.
5, P-type (high power) the battery discharge capacity than the first two have greatly improved resistance to leakage performance of such batteries, and suitable for high current continuous discharge.
6, the capacity of alkaline batteries with the size of the previously mentioned 3 to 7 times the battery, and can be a continuous high-current discharge, with excellent resistance to leakage performance characteristics.
Battery precautions
1, electrical appliances and pavilion dv6000 battery contacts should be clean, wipe with a damp cloth when necessary, to be dried properly loaded according to the polarity mark. Recognized when you install the battery polarity ("+" and "-") the installation is very important, should the requirements of electrical installation with the instructions recommended by the battery; do not follow the specification requirements, will lead to equipment failure, damage to electrical appliances and / or battery.
If three or more than three batteries in series, in which an anti-polarity, reverse the battery is charged, the internal production of gas, the occurrence of venting and electrolyte leakage.
2 Do not mix old and new batteries, the same model but different types or brands of batteries Electrochemical do not mix, otherwise it would be a set of batteries in use in some of the battery over-discharge state, thereby increasing the possibility of leakage.
3, disposable or rechargeable battery recycling is not heated, or they may explode.
4, can not short-circuit the battery to avoid battery leakage or heat damage to the insulation packaging.
5, Do not disassemble the battery, do not heat the battery.
6, electrical appliances when not in a long time removing the vostro 1700 battery ,voatro 1510 battery, turn the power off after use so as not to place inside the battery to discharge caused by leakage of adverse chemical reaction.
7, and used batteries should not be thrown away, put in as much as possible separated from other garbage.
Heat, Loading and Laptop Battery Life
Heat is a killer of all batteries and high temperatures cannot always be avoided. This is the case with a battery inside a laptop, a starter battery under the hood of a car and stationary batteries in a tin shelter under the hot sun. As a guideline, each 8°C (15°F) rise in temperature cuts the life of a sealed lead acid battery in half. A VRLA batteryfor stationary applications that would last 10 years at 25°C (77°F) would only live for five years if operated at 33°C (95°F). Once the battery is damaged by heat, the capacity cannot be restored. The life of a battery also depends on the activity and is shortened if the inspiron e1705 battery is stressed with frequent discharge.
According to the 2010 BCI Failure Mode Study, starter batteries have become more heat-resistant over the past 10 years. In the 2000 study, a change of 7°C (12°F) affected battery life by roughly one year; in 2010 the heat tolerance has widened to 12°C (22°F). In 1962, a starter inspiron e1705 battery lasted 34 months, and in 2000 the life expectancy had increased to 41 months. In 2010, BCI reports an average age of 55 months of use. The cooler North attains 59 months and the warmer South 47 months.
Cranking the engine poses minimal stress on a starter battery. This changes in a start-stop function of a micro hybrid. The micro hybrid turns the IC engine off at a red traffic light and restarts it when the traffic flows. This results in about 2,000 micro cycles per year. Data obtained from car manufacturers show a capacity drop to about 60 percent after two years of use in this configuration. To solve the problem, automakers are using specialty AGM and other variations that are more robust than the regular lead acid. Read more about Alternate Battery Systems. Figure 5 shows the drop in capacity after 700 micro cycles. The simulated start-stop test was performed in Cadex laboratories. CCA remains high.
Test method: The test inspiron e1705 battery was fully charged and then discharged to 70 percent to resemble the SoC of a micro hybrid in real life. The battery was then discharged at 25A for 40 seconds to simulate engine off condition at stoplight with the headlight on, before cranking the engine at 400A and recharging. The CCA readings were taken with the Spectro CA-12.
The cell voltages on a battery string must be similar, and this is especially important for higher-voltage VRLA batteries. With time, individual cells fall out of line, and applying an equalizing charge every six months or so should theoretically bring the cells back to similar voltage levels. While equalizing will boost the needy cells, the healthy cell get stressed if the equalizing charge is applied carelessly. What makes this service so difficult is the inability to accurately measure the condition of each cell and provide the right dose of remedy. Gel and AGM batteries have lower overcharge acceptance than the flooded version and different equalizing conditions apply. Always refer to the manufacturer’s specifications.
Water permeation, or loss of electrolyte, is a concern with sealed lead acid batteries, and overcharging contributes to this condition. While flooded systems accept water, a fill-up is not possible with VRLA. Adding water has been tried, but this does not offer a reliable fix. Experimenting with watering turns the VRLA into unreliable xps m1330 battery that needs high maintenance.
Flooded lead acid batteries are one of the most reliable systems. With good maintenance these batteries last up to 20 years. The disadvantages are the need for watering and providing good ventilation. When VRLA was introduced in the 1980s, manufacturers claimed similar life expectancy to flooded systems, and the telecom industry switched to these maintenance-free batteries,latitude d830 Battery ,inspiron 510m battery. By mid 1990 it became apparent that the life for VRLA did not replicate that of a flooded type; the useful service life was limited to only 5–10 years. It was furthermore noticed that exposing the batteries to temperatures above 40°C (104°F) could cause a thermal runaway condition due to dry-out.
A new lead acid battery should have an open circuit voltage of 2.125V/cell. At this time, the battery is fully charged. During buyer acceptance, the lead acid may drop to between 2.120V and 2.125V/cell. Shipping, dealer storage and installation will decrease the voltage further but the latitude d830 Battery ,inspiron 510m battery should never go much below 2.10V/cell. This would cause sulfation. Battery type, applying a charge or discharge within 24 hours before taking a voltage measurement, as well as temperature will affect the voltage reading. A lower temperature raises the OCV; warm ambient lowers it.
According to the 2010 BCI Failure Mode Study, starter batteries have become more heat-resistant over the past 10 years. In the 2000 study, a change of 7°C (12°F) affected battery life by roughly one year; in 2010 the heat tolerance has widened to 12°C (22°F). In 1962, a starter inspiron e1705 battery lasted 34 months, and in 2000 the life expectancy had increased to 41 months. In 2010, BCI reports an average age of 55 months of use. The cooler North attains 59 months and the warmer South 47 months.
Cranking the engine poses minimal stress on a starter battery. This changes in a start-stop function of a micro hybrid. The micro hybrid turns the IC engine off at a red traffic light and restarts it when the traffic flows. This results in about 2,000 micro cycles per year. Data obtained from car manufacturers show a capacity drop to about 60 percent after two years of use in this configuration. To solve the problem, automakers are using specialty AGM and other variations that are more robust than the regular lead acid. Read more about Alternate Battery Systems. Figure 5 shows the drop in capacity after 700 micro cycles. The simulated start-stop test was performed in Cadex laboratories. CCA remains high.
Test method: The test inspiron e1705 battery was fully charged and then discharged to 70 percent to resemble the SoC of a micro hybrid in real life. The battery was then discharged at 25A for 40 seconds to simulate engine off condition at stoplight with the headlight on, before cranking the engine at 400A and recharging. The CCA readings were taken with the Spectro CA-12.
The cell voltages on a battery string must be similar, and this is especially important for higher-voltage VRLA batteries. With time, individual cells fall out of line, and applying an equalizing charge every six months or so should theoretically bring the cells back to similar voltage levels. While equalizing will boost the needy cells, the healthy cell get stressed if the equalizing charge is applied carelessly. What makes this service so difficult is the inability to accurately measure the condition of each cell and provide the right dose of remedy. Gel and AGM batteries have lower overcharge acceptance than the flooded version and different equalizing conditions apply. Always refer to the manufacturer’s specifications.
Water permeation, or loss of electrolyte, is a concern with sealed lead acid batteries, and overcharging contributes to this condition. While flooded systems accept water, a fill-up is not possible with VRLA. Adding water has been tried, but this does not offer a reliable fix. Experimenting with watering turns the VRLA into unreliable xps m1330 battery that needs high maintenance.
Flooded lead acid batteries are one of the most reliable systems. With good maintenance these batteries last up to 20 years. The disadvantages are the need for watering and providing good ventilation. When VRLA was introduced in the 1980s, manufacturers claimed similar life expectancy to flooded systems, and the telecom industry switched to these maintenance-free batteries,latitude d830 Battery ,inspiron 510m battery. By mid 1990 it became apparent that the life for VRLA did not replicate that of a flooded type; the useful service life was limited to only 5–10 years. It was furthermore noticed that exposing the batteries to temperatures above 40°C (104°F) could cause a thermal runaway condition due to dry-out.
A new lead acid battery should have an open circuit voltage of 2.125V/cell. At this time, the battery is fully charged. During buyer acceptance, the lead acid may drop to between 2.120V and 2.125V/cell. Shipping, dealer storage and installation will decrease the voltage further but the latitude d830 Battery ,inspiron 510m battery should never go much below 2.10V/cell. This would cause sulfation. Battery type, applying a charge or discharge within 24 hours before taking a voltage measurement, as well as temperature will affect the voltage reading. A lower temperature raises the OCV; warm ambient lowers it.
2011年5月17日星期二
Choose A Good Battery
With the diversification of the development of household appliances, laptop battery increasingly widespread use, in addition to flashlights, electronic watches, electric toys, remote control, walkman, radios, tape recorders, electric shavers and other common electronic apparatus, the digital gas meters, Auto-ignition water heater, digital cameras, MP3, car key remote keyless entry, laser pointer, computer input pen, and other new electrical appliances must be made in good performance batteries.
First, the common battery type, commonly known and routine application of
Chinese model of international standard model known as the daily application of standards
R03 R03 7 zinc-manganese dry battery clock, flashlight, remote control
Zinc-manganese dry battery R6 R6 5 clock, flashlight, R6P also be used for remote control
R14 R14 2 zinc-manganese dry battery flashlight, radio,
R20 R20 1 zinc-manganese dry battery flashlight, radio,
LR03 LR03 7 alkaline manganese battery electric toys, music players, tape recorders, electric shavers, remote controls, BP machine
LR6 LR6 5 alkaline manganese battery electric toys, music players, tape recorders, electric shavers, remote controls, BP machine. (Market, recently introduced digital Wang alkaline batteries suitable for digital cameras)
LR14 LR14 2 alkaline manganese battery electric toys, electric shavers, gas water heater
LR20 LR20 1 alkaline manganese battery electric toys, electric shavers, gas water heater
Note: 1, R, said cylindrical battery, L that is an alkaline liquid electrolyte batteries.
2, R6, R14, R20, after three models with S, C, P, after both have three types. If there is R6 R6S, R6C, R6P three. S expressed as a paste-type batteries, C batteries, said board for high-capacity, P is expressed as high-power board batteries.
3, S-type paste-type pavilion dv6000 battery y capacity is low, the battery end, easy to leak, but the price is cheap.
4, C-type (high capacity) battery for low current discharge method.
5, P-type (high power) the battery discharge capacity than the first two have greatly improved resistance to leakage performance of such batteries, and suitable for high current continuous discharge.
6, the capacity of alkaline batteries with the size of the previously mentioned 3 to 7 times the battery, and can be a continuous high-current discharge, with excellent resistance to leakage performance characteristics.
Battery precautions
1, electrical appliances and pavilion dv6000 battery contacts should be clean, wipe with a damp cloth when necessary, to be dried properly loaded according to the polarity mark. Recognized when you install the battery polarity ("+" and "-") the installation is very important, should the requirements of electrical installation with the instructions recommended by the battery; do not follow the specification requirements, will lead to equipment failure, damage to electrical appliances and / or battery.
If three or more than three batteries in series, in which an anti-polarity, reverse the battery is charged, the internal production of gas, the occurrence of venting and electrolyte leakage.
2 Do not mix old and new batteries, the same model but different types or brands of batteries Electrochemical do not mix, otherwise it would be a set of batteries in use in some of the battery over-discharge state, thereby increasing the possibility of leakage.
3, disposable or rechargeable battery recycling is not heated, or they may explode.
4, can not short-circuit the battery to avoid battery leakage or heat damage to the insulation packaging.
5, Do not disassemble the battery, do not heat the battery.
6, electrical appliances when not in a long time removing the vostro 1700 battery ,voatro 1510 battery, turn the power off after use so as not to place inside the battery to discharge caused by leakage of adverse chemical reaction.
7, and used batteries should not be thrown away, put in as much as possible separated from other garbage.
First, the common battery type, commonly known and routine application of
Chinese model of international standard model known as the daily application of standards
R03 R03 7 zinc-manganese dry battery clock, flashlight, remote control
Zinc-manganese dry battery R6 R6 5 clock, flashlight, R6P also be used for remote control
R14 R14 2 zinc-manganese dry battery flashlight, radio,
R20 R20 1 zinc-manganese dry battery flashlight, radio,
LR03 LR03 7 alkaline manganese battery electric toys, music players, tape recorders, electric shavers, remote controls, BP machine
LR6 LR6 5 alkaline manganese battery electric toys, music players, tape recorders, electric shavers, remote controls, BP machine. (Market, recently introduced digital Wang alkaline batteries suitable for digital cameras)
LR14 LR14 2 alkaline manganese battery electric toys, electric shavers, gas water heater
LR20 LR20 1 alkaline manganese battery electric toys, electric shavers, gas water heater
Note: 1, R, said cylindrical battery, L that is an alkaline liquid electrolyte batteries.
2, R6, R14, R20, after three models with S, C, P, after both have three types. If there is R6 R6S, R6C, R6P three. S expressed as a paste-type batteries, C batteries, said board for high-capacity, P is expressed as high-power board batteries.
3, S-type paste-type pavilion dv6000 battery y capacity is low, the battery end, easy to leak, but the price is cheap.
4, C-type (high capacity) battery for low current discharge method.
5, P-type (high power) the battery discharge capacity than the first two have greatly improved resistance to leakage performance of such batteries, and suitable for high current continuous discharge.
6, the capacity of alkaline batteries with the size of the previously mentioned 3 to 7 times the battery, and can be a continuous high-current discharge, with excellent resistance to leakage performance characteristics.
Battery precautions
1, electrical appliances and pavilion dv6000 battery contacts should be clean, wipe with a damp cloth when necessary, to be dried properly loaded according to the polarity mark. Recognized when you install the battery polarity ("+" and "-") the installation is very important, should the requirements of electrical installation with the instructions recommended by the battery; do not follow the specification requirements, will lead to equipment failure, damage to electrical appliances and / or battery.
If three or more than three batteries in series, in which an anti-polarity, reverse the battery is charged, the internal production of gas, the occurrence of venting and electrolyte leakage.
2 Do not mix old and new batteries, the same model but different types or brands of batteries Electrochemical do not mix, otherwise it would be a set of batteries in use in some of the battery over-discharge state, thereby increasing the possibility of leakage.
3, disposable or rechargeable battery recycling is not heated, or they may explode.
4, can not short-circuit the battery to avoid battery leakage or heat damage to the insulation packaging.
5, Do not disassemble the battery, do not heat the battery.
6, electrical appliances when not in a long time removing the vostro 1700 battery ,voatro 1510 battery, turn the power off after use so as not to place inside the battery to discharge caused by leakage of adverse chemical reaction.
7, and used batteries should not be thrown away, put in as much as possible separated from other garbage.
2011年5月16日星期一
Avoid Laptop Battery Failure
High failure rate and unreliable battery performance have prompted many organizations to check fleet batteries as part of quality control,solar radio emergency. This entails inspecting new batteries as well as maintaining packs deployed in the field. Conventional wisdom says a battery should always perform flawlessly when new. Yet many users know that a fresh supply of batteries does not always meet the specifications. Some purchasers check incoming batteries with a battery analyzer and return an entire lot if one in 10 does not meet the capacity requirements. Placing underperforming batteries into the field can jeopardize an entire system with unpredictable performance and frequent downtime.
A customer will occasionally call a maker of studio 1535 battery analyzers, such as Cadex, to complain that the unit is faulty and no longer indicates correct capacity readings when testing batteries. In most cases, the customer has just purchased a new batch of batteries, and when tested, their capacities were at an unacceptable low level of 70 percent instead of the specified 100 percent. The customer naturally assumes that it can’t be these new batteries and blames the analyzer.
Battery analyzers also perform the important function of restoring faded batteries and weeding out deadwood. Weak batteries can hide among their good peers and everything seems fine. Yet, when the system is put to the test in an emergency situation, these non-performers can wreak havoc. Underperforming batteries are the cause of many operational failures.
Organizations tend to postpone studio 1535 battery maintenance until a crisis situation develops. This happened to a fire department in the Vancouver area, and the two-way radios experienced chronic communication problems, especially during callouts lasting more than two hours. Although the radios seemed to function well in receive mode, the firefighters had trouble transmitting. They were often left in peril, unaware that their calls for help had not gone out.
Responding to the growing complaints from firefighters, the fire brigade acquired a Cadex battery analyzer to service all batteries. Packs that failed to recover and deliver the required target capacity of 80 percent were replaced. The technician supervising the service was surprised to see how many fleet batteries were underperforming. Many had capacities of only 20 percent after a full charge, a level that is not sufficient for field use.
Shortly after servicing the batteries, the firefighters were summoned to a large fire that lasted for 10 hours and demanded heavy radio traffic. To their astonishment, none of the radios failed, and the success of this flawless operation was accredited to the studio 1535 battery performance. The captain of the fire brigade personally contacted the manufacturer of the battery analyzer and endorsed the device enthusiastically.
On another occasion, a Cadex representative was allowed to visit the emergency management facility of a large US city where over 1,000 batteries sat in chargers. The green lights glowed, indicating that the batteries were ready at a moment’s notice. The officer in charge stood erect and said confidently, “We are ready for any emergency.”
Knowing that nickel-based batteries sitting in chargers have been weakened by memory, the representative asked the officer to hand over a battery from the charger to do a validation check. He obliged and within seconds into the test, the analyzer indicated a fail condition. In an effort to make good, the officer grabbed another battery from the charger, slid it into the studio xps 16 battery , studio xps 1640 battery analyzer and it also failed. Subsequent packs were tested with the same failing results.
Such scenarios are not isolated, and in most cases even the operators in charge do not know about the condition of batteries on standby. If the failure were known, lack of funds and political considerations would likely stand in the way of a fix. A maintenance program that mandates periodic verification of battery readiness would prevent the system from falling into disrepair. All the operator can do meanwhile is pray that no emergency will occur.
A user group that relies heavily on batteries is the military. Defense organizations take great pride in acquiring the best-performing equipment. When it comes to batteries,studio xps 16 battery , studio xps 1640 battery, however, there are exceptions and batteries often escape the scrutiny of military inspection. Auditors pass them on visual appearance rather than performance. Maintenance requirements are frequently ignored and little effort is made to keep track of capacity, cycle count and age. In time, weak batteries get mixed up with new ones and soldiers begin carrying rocks instead of batteries. Figure 1 illustrates this situation in a cartoon format.
A customer will occasionally call a maker of studio 1535 battery analyzers, such as Cadex, to complain that the unit is faulty and no longer indicates correct capacity readings when testing batteries. In most cases, the customer has just purchased a new batch of batteries, and when tested, their capacities were at an unacceptable low level of 70 percent instead of the specified 100 percent. The customer naturally assumes that it can’t be these new batteries and blames the analyzer.
Battery analyzers also perform the important function of restoring faded batteries and weeding out deadwood. Weak batteries can hide among their good peers and everything seems fine. Yet, when the system is put to the test in an emergency situation, these non-performers can wreak havoc. Underperforming batteries are the cause of many operational failures.
Organizations tend to postpone studio 1535 battery maintenance until a crisis situation develops. This happened to a fire department in the Vancouver area, and the two-way radios experienced chronic communication problems, especially during callouts lasting more than two hours. Although the radios seemed to function well in receive mode, the firefighters had trouble transmitting. They were often left in peril, unaware that their calls for help had not gone out.
Responding to the growing complaints from firefighters, the fire brigade acquired a Cadex battery analyzer to service all batteries. Packs that failed to recover and deliver the required target capacity of 80 percent were replaced. The technician supervising the service was surprised to see how many fleet batteries were underperforming. Many had capacities of only 20 percent after a full charge, a level that is not sufficient for field use.
Shortly after servicing the batteries, the firefighters were summoned to a large fire that lasted for 10 hours and demanded heavy radio traffic. To their astonishment, none of the radios failed, and the success of this flawless operation was accredited to the studio 1535 battery performance. The captain of the fire brigade personally contacted the manufacturer of the battery analyzer and endorsed the device enthusiastically.
On another occasion, a Cadex representative was allowed to visit the emergency management facility of a large US city where over 1,000 batteries sat in chargers. The green lights glowed, indicating that the batteries were ready at a moment’s notice. The officer in charge stood erect and said confidently, “We are ready for any emergency.”
Knowing that nickel-based batteries sitting in chargers have been weakened by memory, the representative asked the officer to hand over a battery from the charger to do a validation check. He obliged and within seconds into the test, the analyzer indicated a fail condition. In an effort to make good, the officer grabbed another battery from the charger, slid it into the studio xps 16 battery , studio xps 1640 battery analyzer and it also failed. Subsequent packs were tested with the same failing results.
Such scenarios are not isolated, and in most cases even the operators in charge do not know about the condition of batteries on standby. If the failure were known, lack of funds and political considerations would likely stand in the way of a fix. A maintenance program that mandates periodic verification of battery readiness would prevent the system from falling into disrepair. All the operator can do meanwhile is pray that no emergency will occur.
A user group that relies heavily on batteries is the military. Defense organizations take great pride in acquiring the best-performing equipment. When it comes to batteries,studio xps 16 battery , studio xps 1640 battery, however, there are exceptions and batteries often escape the scrutiny of military inspection. Auditors pass them on visual appearance rather than performance. Maintenance requirements are frequently ignored and little effort is made to keep track of capacity, cycle count and age. In time, weak batteries get mixed up with new ones and soldiers begin carrying rocks instead of batteries. Figure 1 illustrates this situation in a cartoon format.
2011年5月15日星期日
Laptop battery power-saving tips
How best to extend the battery life is one of the many notebook users matter of great concern. The use of some small skills and in use to reduce unnecessary spending as much as possible to make the most of your inspiron 15z battery,inspiron 1570 battery fully utilized, IBM Personal Computing Division of the engineers here to the vast number of notebook PC users with a number of good suggestions to ensure that you can books to extend the maximum battery life, thereby enhancing work efficiency, enjoy the mobile office and entertainment fun without limits.
To reduce the brightness of the screen. At the same time, although the IBM ThinkPad notebook computers equipped with the keyboard lights ThinkLight, but in order to power, it is best only in the dark under the conditions of access to care for her.
When not using the wireless receiver device, turn it off.
Some users like to open something all right CD or DVD play music, the lenovo battery will power the player as the music flow quietly away. Suggest that you only want to add music to enjoy.
Battery use, as far as possible to fully charge and discharge.
To avoid high or low temperature use. For example, when you are sunbathing on the beach when the books do not stay in your car sauna.
For your ThinkPad to use the correct AC adapter.
Use the IBM ThinkPad battery management software to choose the most suitable for Battery MaxiMiser to extend the power of your program.
To monitor, hard disk and system standby time sleep set - because the work you do not need your notebook computer is still running at full capacity.
The role of the Intel SpeedStep technology, the processor load based on the current situation, the automatic adjustment of speed, to avoid small Mara carts, cars or big Marathi situation, the overall saving inspiron 15z battery,inspiron 1570 battery consumption.
In fact, the inspiron 15z battery,inspiron 1570 battery is also a spiritual guy, after listening to experts, to protect him properly treat him, and he will also bring you to enjoy a better mobile.
To reduce the brightness of the screen. At the same time, although the IBM ThinkPad notebook computers equipped with the keyboard lights ThinkLight, but in order to power, it is best only in the dark under the conditions of access to care for her.
When not using the wireless receiver device, turn it off.
Some users like to open something all right CD or DVD play music, the lenovo battery will power the player as the music flow quietly away. Suggest that you only want to add music to enjoy.
Battery use, as far as possible to fully charge and discharge.
To avoid high or low temperature use. For example, when you are sunbathing on the beach when the books do not stay in your car sauna.
For your ThinkPad to use the correct AC adapter.
Use the IBM ThinkPad battery management software to choose the most suitable for Battery MaxiMiser to extend the power of your program.
To monitor, hard disk and system standby time sleep set - because the work you do not need your notebook computer is still running at full capacity.
The role of the Intel SpeedStep technology, the processor load based on the current situation, the automatic adjustment of speed, to avoid small Mara carts, cars or big Marathi situation, the overall saving inspiron 15z battery,inspiron 1570 battery consumption.
In fact, the inspiron 15z battery,inspiron 1570 battery is also a spiritual guy, after listening to experts, to protect him properly treat him, and he will also bring you to enjoy a better mobile.
2011年5月13日星期五
Laptop took the back-to-basics route
Rank-and-file government workers will almost certainly need to get more familiar with Web 2.0 technology in 2010, said Mark Drapeau, an adjunct professor at the School of Media and Public Affairs at the George Washington University.
The dell(studio xps 16 battery ,studio 15 battery ) is exceptionally light and thin, and has a footprint almost exactly the size of an A4 sheet of paper. There are smaller notebooks around, but we’re hard pushed to think of a bag it won’t fit in, and at 1.5kg it’s not going to weigh you down much either.
The plastic surrounding the keyboard is a smooth dark gray color with a non-glossy finish, which seems to be relatively durable. The lid and screen casing are a glossy black plastic, which attracts fingerprints easily and is more prone to scratches than the dark gray plastic. The bottom and sides of the notebook are a textured black plastic, which is more durable than the other plastics used.
Laptops with dual-core processors offer good performance, but adding an extra core helps boost application performance, Grim says. For example, the third core can take on resource-heavy tasks like antivirus scanning while freeing up the other two cores. The chip could also be a power-efficient option to Intel’s quad-core chips, which usually go into power-hungry enthusiast systems.(studio xps 16 battery ,studio 15 battery )
Whether the Lenovvo tablet is real or not, many believe that dell(studio xps 16 battery ,studio 15 battery ) has something in the works.Rapid Repair CEO Aaron Vronko, whose company performs “dissections” of devices and who has a broad knowledge of the ins and outs of many popular smartphones, said he believes an Apple tablet is indeed on the way, and he offered eWEEK his predictions about what consumers can expect.
After realizing your laptop’s been snatched, you’d get to a Web-enabled desktop or laptop — or smart phone, if it can run Adobe Flash Player 10 — log into your Laptop Cop online account, and click a button reporting your laptop stolen. At this point, if your thief is not yet surfing the Web, you can queue up any important files or compromising photos you’d want to retrieve or delete. As soon as the thief or the person to whom he’s already sold your laptop goes online, “the retrieval/deletion process automatically takes place,” according to a company customer service rep.
The X90cw is based on Microsoft’s (MSFT) Windows Embedded Standard 2009 and can access server-based applications via Wi-Fi, 3G or a wired Ethernet connection. It is compatible with desktop virtualization platforms from Citrix, Microsoft and VMware, according to Wyse.
The cost of this laptop is $729 which is the moderate price and it as 1.3GHz Intel core Duo SU7300 ULV CPU and 4GB, DDR2 800 MHz memory for storage. This laptop is equipped with Intel GM4500 MHD GPU and the Intel GM45 chipset and has a extra spacious hard drive that provides storage of 500GB which spins at 5400rpm. The pre installed windows 7 Home Premium 64-bit is the operating system.
Build quality is excellent thanks to the very strong and rigid unibody chassis that is machined out a solid block of aluminum. Unless you were going to clamp the dell (studio 1435 battery ,studio 1436 battery) MacBook Pro in a vise and try to bend it, you can’t really find any flex anywhere on the main half of the notebook. The screen cover does flex slightly under strong pressure, but with something that thin it was expected. Without any plastic panels, except at the screen hinge, there are no parts to squeak or creak under normal use. Outside of a few rugged models I can’t think of a single notebook that has a stronger chassis than the unibody MacBooks.
The design of the G550 has changed slightly from the G530, switching from a smooth matte exterior finish, to a black weave pattern. The new cover is every bit as strong as the last one, preventing any screen distortion even if you hit or flex the back of the screen. The interior of the notebook shares the same color as the lid, but is textured with a rougher matte finish similar to what you would find on unpainted sections of a ThinkPad. Dell(studio 1535 battery) took the back-to-basics route with the color scheme on this notebook, making it entirely black inside and out.
Having a laptop battery-powered radio can let you listen to news that literally could save your life during tornadoes, hurricanes and ice storms. As is true with the lights, brands aren’t important here.Almost any radio will do. But it’s especially nice to have one that also can receive emergency broadcasts from the National Weather Service.
The dell(studio xps 16 battery ,studio 15 battery ) is exceptionally light and thin, and has a footprint almost exactly the size of an A4 sheet of paper. There are smaller notebooks around, but we’re hard pushed to think of a bag it won’t fit in, and at 1.5kg it’s not going to weigh you down much either.
The plastic surrounding the keyboard is a smooth dark gray color with a non-glossy finish, which seems to be relatively durable. The lid and screen casing are a glossy black plastic, which attracts fingerprints easily and is more prone to scratches than the dark gray plastic. The bottom and sides of the notebook are a textured black plastic, which is more durable than the other plastics used.
Laptops with dual-core processors offer good performance, but adding an extra core helps boost application performance, Grim says. For example, the third core can take on resource-heavy tasks like antivirus scanning while freeing up the other two cores. The chip could also be a power-efficient option to Intel’s quad-core chips, which usually go into power-hungry enthusiast systems.(studio xps 16 battery ,studio 15 battery )
Whether the Lenovvo tablet is real or not, many believe that dell(studio xps 16 battery ,studio 15 battery ) has something in the works.Rapid Repair CEO Aaron Vronko, whose company performs “dissections” of devices and who has a broad knowledge of the ins and outs of many popular smartphones, said he believes an Apple tablet is indeed on the way, and he offered eWEEK his predictions about what consumers can expect.
After realizing your laptop’s been snatched, you’d get to a Web-enabled desktop or laptop — or smart phone, if it can run Adobe Flash Player 10 — log into your Laptop Cop online account, and click a button reporting your laptop stolen. At this point, if your thief is not yet surfing the Web, you can queue up any important files or compromising photos you’d want to retrieve or delete. As soon as the thief or the person to whom he’s already sold your laptop goes online, “the retrieval/deletion process automatically takes place,” according to a company customer service rep.
The X90cw is based on Microsoft’s (MSFT) Windows Embedded Standard 2009 and can access server-based applications via Wi-Fi, 3G or a wired Ethernet connection. It is compatible with desktop virtualization platforms from Citrix, Microsoft and VMware, according to Wyse.
The cost of this laptop is $729 which is the moderate price and it as 1.3GHz Intel core Duo SU7300 ULV CPU and 4GB, DDR2 800 MHz memory for storage. This laptop is equipped with Intel GM4500 MHD GPU and the Intel GM45 chipset and has a extra spacious hard drive that provides storage of 500GB which spins at 5400rpm. The pre installed windows 7 Home Premium 64-bit is the operating system.
Build quality is excellent thanks to the very strong and rigid unibody chassis that is machined out a solid block of aluminum. Unless you were going to clamp the dell (studio 1435 battery ,studio 1436 battery) MacBook Pro in a vise and try to bend it, you can’t really find any flex anywhere on the main half of the notebook. The screen cover does flex slightly under strong pressure, but with something that thin it was expected. Without any plastic panels, except at the screen hinge, there are no parts to squeak or creak under normal use. Outside of a few rugged models I can’t think of a single notebook that has a stronger chassis than the unibody MacBooks.
The design of the G550 has changed slightly from the G530, switching from a smooth matte exterior finish, to a black weave pattern. The new cover is every bit as strong as the last one, preventing any screen distortion even if you hit or flex the back of the screen. The interior of the notebook shares the same color as the lid, but is textured with a rougher matte finish similar to what you would find on unpainted sections of a ThinkPad. Dell(studio 1535 battery) took the back-to-basics route with the color scheme on this notebook, making it entirely black inside and out.
Having a laptop battery-powered radio can let you listen to news that literally could save your life during tornadoes, hurricanes and ice storms. As is true with the lights, brands aren’t important here.Almost any radio will do. But it’s especially nice to have one that also can receive emergency broadcasts from the National Weather Service.
New Battery Technology Charges in Seconds
For the successful takeover of alternative energy over conventional sources of energy we need a good inspiron 14z battery,inspiron 1470 battery technology too for power storage. The devices we want to keep on using need to be recharged. And we all know that recharge takes hours whether it's our mobiles or laptops. If the researchers from MIT has implemented the know-how of these lithium-ion batteries, successfully then our waiting hours for recharge will be over.
This breakthrough can be achieved in two years. MIT scientists are hopeful that this laptop battery can recharge a device in seconds. Gerbrand Ceder, who is the professor of Materials Science and Engineering at the Massachusetts Institute of Technology (MIT), said,If you can charge your phone in 30 seconds, that becomes a life changer.¡± He also explains,It could change the way we think about technology like this: you would literally be able to charge up while you stand and wait.
This development can transform the power storage technology and can help hybrid cars or electric cars and give the necessary push to renewable energy. This expertise can reduce the weight and size of the batteries,inspiron 14z battery,inspiron 1470 battery and our devices can be charged within few seconds.
The researchers, from the Massachusetts Institute of Technology, have already made a small prototype cell that charges fully in 10 to 20 seconds, compared with six minutes for cells made in the standard way. The researchers are of the view that this technology will be available commercially within two to three years, because they are not using some new material. They have also nicknamed this technology as the beltway battery, after the orbital motorway in Washington DC. His lithium-ion laptop battery utilizes a bypass system that allows the lithium-ions to enter and leave the battery speedily. The scientists discovered that by coating particles of lithium iron phosphate in a glassy material called lithium pyrophosphate, ions behave differently. These ions can bypass the channels and move more quickly. As we are acquainted with the fact that rechargeable batteries,inspiron 14z battery,inspiron 1470 battery store up and discharge energy as charged atoms, known as ions, from between two electrodes called the anode and the cathode. Their charge and discharge rate are restricted by the speed with which these ions move.
If MIT scientists successfully complete this project for commercial use, we can charge electric car batteries in less than one hour. Till now recharging is one of the greatest hurdles for mass production of electric cars. Solar and wind energy generation can also be benefited with this breakthrough. This lithium-ion battery can be utilized for storage of excess energy.
This breakthrough can be achieved in two years. MIT scientists are hopeful that this laptop battery can recharge a device in seconds. Gerbrand Ceder, who is the professor of Materials Science and Engineering at the Massachusetts Institute of Technology (MIT), said,If you can charge your phone in 30 seconds, that becomes a life changer.¡± He also explains,It could change the way we think about technology like this: you would literally be able to charge up while you stand and wait.
This development can transform the power storage technology and can help hybrid cars or electric cars and give the necessary push to renewable energy. This expertise can reduce the weight and size of the batteries,inspiron 14z battery,inspiron 1470 battery and our devices can be charged within few seconds.
The researchers, from the Massachusetts Institute of Technology, have already made a small prototype cell that charges fully in 10 to 20 seconds, compared with six minutes for cells made in the standard way. The researchers are of the view that this technology will be available commercially within two to three years, because they are not using some new material. They have also nicknamed this technology as the beltway battery, after the orbital motorway in Washington DC. His lithium-ion laptop battery utilizes a bypass system that allows the lithium-ions to enter and leave the battery speedily. The scientists discovered that by coating particles of lithium iron phosphate in a glassy material called lithium pyrophosphate, ions behave differently. These ions can bypass the channels and move more quickly. As we are acquainted with the fact that rechargeable batteries,inspiron 14z battery,inspiron 1470 battery store up and discharge energy as charged atoms, known as ions, from between two electrodes called the anode and the cathode. Their charge and discharge rate are restricted by the speed with which these ions move.
If MIT scientists successfully complete this project for commercial use, we can charge electric car batteries in less than one hour. Till now recharging is one of the greatest hurdles for mass production of electric cars. Solar and wind energy generation can also be benefited with this breakthrough. This lithium-ion battery can be utilized for storage of excess energy.
2011年5月11日星期三
Dell XPS 15 L502X (Sandy Bridge) Review
When we last reviewed the Dell XPS 15, we praised the notebook's strong performance, best-in-class audio, and colorful screen. Now Dell has upgraded its premium 15-incher with Intel's second-generation Core Series processors and Nvidia GeForce GT 500 series graphics, which promise even better performance. We had a chance to test out a high-end $1,488 configuration of the XPS 15, complete with a 2-GHz quad-core Core i7, 8GB of RAM, a 1080p screen, and Nvidia GT540M graphics. These specs promise--and deliver--remarkable processing and media prowess, but is the whole package worth nearly $1,500?
The Dell XPS 15 sports a matte silver anodized aluminum lid that doesn't pick up fingerprints, but it seems a bit dull. Fortunately, Dell offers 200 different Dell Studio lid patterns (an $85 add-on). On the plus side, we appreciate the small black bar that sticks out behind the lid, which has a backlit XPS logo that pulses when the system is asleep. We also like that the matte finish continues on the sides and bottom, areas too often ignored by other notebook makers.
The dark brushed aluminum deck on the inside of the machine and the diamond-cut, silver trim that surround the keyboard and touchpad look more modern. The JBL speakers, which sit on either side of the keyboard, have a unique pattern that looks a bit old-fashioned.
At 15 x 10.4 x 1.5 inches and 6.6 pounds with the nine-cell battery, the XPS 15 is one of the bulkier 15-inch notebooks we've tested. It barely fit into a standard notebook bag, and it weighs a lot more than the 5.6-pound 15-inch MacBook Pro and the IdeaPad Y560d (6.2 pounds). Also, because the nine-cell battery tilts the system upward, the back side increases to 2.25 inches tall.
Throughout our testing, the Dell XPS 15 stayed pleasantly cool. Even after streaming a Hulu video at full screen for 15 minutes, we measured the touchpad at a reasonable 91 degrees Fahrenheit, the keyboard at 93 degrees, and the bottom at 93 degrees. We consider temperatures below 95 degrees comfortable.
At first glance, the XPS 15's keyboard has a lot going for it: an adjustable backlight, large, well-placed keys, and a generous, comfortable palm rest. However, the keys themselves were somewhat stiff. This led us to be more deliberate when typing. We notched a 74 word-per-minute score on the Ten Thumbs Typing Test, 6 wpm lower than our typical average.
Above the keyboard sit a few status lights and three touch-sensitive buttons. The first button launches Windows Mobility Center, a mini control panel that allows you to easily manage your Wi-Fi, Bluetooth, and display settings; we particularly appreciated being able to set the keyboard backlight's brightness. The second button is user-configurable, and the third button launches Dell Audio by Realtek, an audio control center.
The large 3.9 x 2.2-inch touchpad on the XPS 15 offers just the right amount of friction and smoothly executes multitouch gestures such as pinch-to-zoom. It also has two discrete mouse buttons that offer good tactile feedback.
The 15.6-inch, 1920 x 1080 resolution display on the XPS 15 is one of the brightest and most colorful we've tested. Even at viewing angles of nearly 90 degrees to the left or right, images stayed sharp and bright.
The XPS 15 played every video we threw at it without hesitation, from a 1080p QuickTime trailer for Thor to a 720p Episode of Fringe streamed from Fox.com to a Blu-ray movie of Hitch. The screen is so sharp that it exposed some film grain in the Hitch Blu-ray.
The XPS 15 is good enough to serve as your home stereo. The JBL Speakers and bottom-mounted sub-woofer offer incredibly loud and accurate sound. Whether we were listening to a bass-heavy song such as "Forget Me Nots," a funk classic such as Kool and the Gang's "Summer Madness," or a classical tune such as Richard Strauss' "Thus Spake Zarathustra," sound was bright and true, even at maximum volume. In fact, when listening to these songs we were able to hear a clear separation of instruments, from the twanging of the bass line in "Forget Me Nots" to the percussion in "Summer Madness."
The Wave MaxxAudio sound enhancement software plays a huge role in providing this level of fidelity. When you hit the Waves MaxxAudio button that sits above the PrtSrc key, you get a control panel where you can turn MaxxAudio on or off and make fine adjustments to its settings. The software also includes preset levels that are optimized for music, movies, gaming, or voice conferencing. However, our favorite feature is the Leveler, which automatically adjusts your speakers to give you the best possible fidelity at maximum volume, It also has a "midnight" setting that gives you lower volumes for late-night listening.
The Dell XPS 15 has a few high-end ports. On the right side are a headphone jack, a microphone jack, and an S/PDIF connector, along with a USB 2.0/eSATA combo port. On the back, the XPS 15 has an HDMI port, Ethernet, mini DisplayPort, Kensington lock slot, and a USB 3.0 port. On the left side is one more USB 3.0 port. The front lip contains a 9-in-1 card reader. The XPS 15 doesn't have a VGA connection for video output, but that's not a big deal for the target audience.
The 2-megapixel webcam provides 720p video output that works with Skype HD. The low-light performance seems improved over that of the XPS 15 we tested last fall. In both our dim living room and a dark cubicle, we were able to get reasonably bright images when using Skype or taking photos with Dell's Webcam Central software. Dell's software offers a wide array of additional features, including the ability to use one of 10 "avatars" in lieu of your face. These choices include a baby, a kitten, and an alien.
New laptop articles:
latitude d830 Battery ,inspiron 510m battery ,vostro 1700 battery ,latitude d630 battery ,solar radio emergency,
The Dell XPS 15 sports a matte silver anodized aluminum lid that doesn't pick up fingerprints, but it seems a bit dull. Fortunately, Dell offers 200 different Dell Studio lid patterns (an $85 add-on). On the plus side, we appreciate the small black bar that sticks out behind the lid, which has a backlit XPS logo that pulses when the system is asleep. We also like that the matte finish continues on the sides and bottom, areas too often ignored by other notebook makers.
The dark brushed aluminum deck on the inside of the machine and the diamond-cut, silver trim that surround the keyboard and touchpad look more modern. The JBL speakers, which sit on either side of the keyboard, have a unique pattern that looks a bit old-fashioned.
At 15 x 10.4 x 1.5 inches and 6.6 pounds with the nine-cell battery, the XPS 15 is one of the bulkier 15-inch notebooks we've tested. It barely fit into a standard notebook bag, and it weighs a lot more than the 5.6-pound 15-inch MacBook Pro and the IdeaPad Y560d (6.2 pounds). Also, because the nine-cell battery tilts the system upward, the back side increases to 2.25 inches tall.
Throughout our testing, the Dell XPS 15 stayed pleasantly cool. Even after streaming a Hulu video at full screen for 15 minutes, we measured the touchpad at a reasonable 91 degrees Fahrenheit, the keyboard at 93 degrees, and the bottom at 93 degrees. We consider temperatures below 95 degrees comfortable.
At first glance, the XPS 15's keyboard has a lot going for it: an adjustable backlight, large, well-placed keys, and a generous, comfortable palm rest. However, the keys themselves were somewhat stiff. This led us to be more deliberate when typing. We notched a 74 word-per-minute score on the Ten Thumbs Typing Test, 6 wpm lower than our typical average.
Above the keyboard sit a few status lights and three touch-sensitive buttons. The first button launches Windows Mobility Center, a mini control panel that allows you to easily manage your Wi-Fi, Bluetooth, and display settings; we particularly appreciated being able to set the keyboard backlight's brightness. The second button is user-configurable, and the third button launches Dell Audio by Realtek, an audio control center.
The large 3.9 x 2.2-inch touchpad on the XPS 15 offers just the right amount of friction and smoothly executes multitouch gestures such as pinch-to-zoom. It also has two discrete mouse buttons that offer good tactile feedback.
The 15.6-inch, 1920 x 1080 resolution display on the XPS 15 is one of the brightest and most colorful we've tested. Even at viewing angles of nearly 90 degrees to the left or right, images stayed sharp and bright.
The XPS 15 played every video we threw at it without hesitation, from a 1080p QuickTime trailer for Thor to a 720p Episode of Fringe streamed from Fox.com to a Blu-ray movie of Hitch. The screen is so sharp that it exposed some film grain in the Hitch Blu-ray.
The XPS 15 is good enough to serve as your home stereo. The JBL Speakers and bottom-mounted sub-woofer offer incredibly loud and accurate sound. Whether we were listening to a bass-heavy song such as "Forget Me Nots," a funk classic such as Kool and the Gang's "Summer Madness," or a classical tune such as Richard Strauss' "Thus Spake Zarathustra," sound was bright and true, even at maximum volume. In fact, when listening to these songs we were able to hear a clear separation of instruments, from the twanging of the bass line in "Forget Me Nots" to the percussion in "Summer Madness."
The Wave MaxxAudio sound enhancement software plays a huge role in providing this level of fidelity. When you hit the Waves MaxxAudio button that sits above the PrtSrc key, you get a control panel where you can turn MaxxAudio on or off and make fine adjustments to its settings. The software also includes preset levels that are optimized for music, movies, gaming, or voice conferencing. However, our favorite feature is the Leveler, which automatically adjusts your speakers to give you the best possible fidelity at maximum volume, It also has a "midnight" setting that gives you lower volumes for late-night listening.
The Dell XPS 15 has a few high-end ports. On the right side are a headphone jack, a microphone jack, and an S/PDIF connector, along with a USB 2.0/eSATA combo port. On the back, the XPS 15 has an HDMI port, Ethernet, mini DisplayPort, Kensington lock slot, and a USB 3.0 port. On the left side is one more USB 3.0 port. The front lip contains a 9-in-1 card reader. The XPS 15 doesn't have a VGA connection for video output, but that's not a big deal for the target audience.
The 2-megapixel webcam provides 720p video output that works with Skype HD. The low-light performance seems improved over that of the XPS 15 we tested last fall. In both our dim living room and a dark cubicle, we were able to get reasonably bright images when using Skype or taking photos with Dell's Webcam Central software. Dell's software offers a wide array of additional features, including the ability to use one of 10 "avatars" in lieu of your face. These choices include a baby, a kitten, and an alien.
New laptop articles:
latitude d830 Battery ,inspiron 510m battery ,vostro 1700 battery ,latitude d630 battery ,solar radio emergency,
2011年5月10日星期二
Discharging at High and Low Temperatures
Like humans, batteries function best at room temperature, and any deviation towards hot and cold changes the performance and/or longevity. Operating a battery at elevated temperatures momentarily improves performance by lowering the internal resistance and speeding up the chemical metabolism, but such a condition shortens service life if allowed to continue for a long period of time. Some manufacturers of lead acid batteries,thinkpad t40 battery ，thinkpad t60 battery make use of the improved performance at warmer temperatures and specify the batteries at a toasty 27°C (80°F).
Cold temperature increases the internal resistance and diminishes the capacity. Batteries that would provide 100 percent capacity at 27°C (80°F) will typically deliver only 50 percent at –18°C (0°F). The capacity decrease is linear with temperature.
Li-ion also performs better at high temperatures than at low ones. Heat lowers the internal resistance but this stresses the battery. Warming a dying flashlight or cellular phone battery in your jean pocket might provide additional runtime in the winter. As all drivers in cold countries know, a warm thinkpad t40 battery ，thinkpad t60 battery cranks the car engine easier than a cold one.
The dry solid polymer battery uses heat to promote ion flow in what is called a “true plastic battery.” The battery requires a core temperature of 60 to 100°C (140 to 212°F) to become conductive. The dry solid polymer has found a niche market for stationary power applications in warm climates where heat serves as a catalyst rather than a disadvantage. Built-in heating elements keep the battery operational at all times. High battery cost and safety concerns have limited the application of this technology. The more common Li-polymer uses moist electrolyte to enhance conductivity, as discussed earlier. Read more about the Lithium-polymer thinkpad t40 battery ，thinkpad t60 battery.
Batteries achieve optimum service life if used at 20°C (68°F) or slightly below, and nickel-based chemistries degrade rapidly when cycled at high ambient temperatures. If, for example, a battery operates at 30°C (86°F) instead of a more moderate room temperature, the cycle life is reduced by 20 percent. At 40°C (104°F), the loss jumps to a whopping 40 percent, and if charged and discharged at 45°C (113°F), the cycle life is only half of what can be expected if used at 20°C (68°F).
The performance of all thinkpad x60 battery chemistries drops drastically at low temperatures. At –20°C (–4°F) most nickel-, lead- and lithium-based batteries stop functioning. Although NiCd can go down to –40°C (-40°F), the permissible discharge is only 0.2C (5-hour rate). Specially built Li- ion brings the operating temperature down to –40°C, but only on discharge and at a reduced discharge. With lead acid we have the danger of the electrolyte freezing, which can crack the enclosure. Lead acid freezes more easily with a low charge when the specific gravity of the electrolyte is more like water.
Cell matching by using cells of similar capacity plays an important role when discharging at low temperature under heavy load. Since the cells in a battery pack can never be perfectly matched, a negative voltage potential can occur across a weaker cell on a multi-cell pack if the discharge is allowed to continue beyond a safe cut-off point. Known as cell reversal, the weak cell suffers damage to the point of developing a permanent electrical short. The larger the cell-count, the greater the likelihood that a cell might reverse under load. Over-discharge at a heavy load and low temperature is a large contributor to thinkpad x60 battery failure of cordless power tools, especially nickel-based packs; Li-ion packs come with protection circuits and the failure rate is lower. Read about Cell Mismatch and Balancing.
Users of electric vehicles need to understand that the driving distance specified per charge is given under normal temperature; frigid cold will sharply reduce the available mileage. Using electricity for cabin heating is not the only cause for the shorter driving distance between charging; the thinkpad x60 battery performance is reduced when cold.
Cold temperature increases the internal resistance and diminishes the capacity. Batteries that would provide 100 percent capacity at 27°C (80°F) will typically deliver only 50 percent at –18°C (0°F). The capacity decrease is linear with temperature.
Li-ion also performs better at high temperatures than at low ones. Heat lowers the internal resistance but this stresses the battery. Warming a dying flashlight or cellular phone battery in your jean pocket might provide additional runtime in the winter. As all drivers in cold countries know, a warm thinkpad t40 battery ，thinkpad t60 battery cranks the car engine easier than a cold one.
The dry solid polymer battery uses heat to promote ion flow in what is called a “true plastic battery.” The battery requires a core temperature of 60 to 100°C (140 to 212°F) to become conductive. The dry solid polymer has found a niche market for stationary power applications in warm climates where heat serves as a catalyst rather than a disadvantage. Built-in heating elements keep the battery operational at all times. High battery cost and safety concerns have limited the application of this technology. The more common Li-polymer uses moist electrolyte to enhance conductivity, as discussed earlier. Read more about the Lithium-polymer thinkpad t40 battery ，thinkpad t60 battery.
Batteries achieve optimum service life if used at 20°C (68°F) or slightly below, and nickel-based chemistries degrade rapidly when cycled at high ambient temperatures. If, for example, a battery operates at 30°C (86°F) instead of a more moderate room temperature, the cycle life is reduced by 20 percent. At 40°C (104°F), the loss jumps to a whopping 40 percent, and if charged and discharged at 45°C (113°F), the cycle life is only half of what can be expected if used at 20°C (68°F).
The performance of all thinkpad x60 battery chemistries drops drastically at low temperatures. At –20°C (–4°F) most nickel-, lead- and lithium-based batteries stop functioning. Although NiCd can go down to –40°C (-40°F), the permissible discharge is only 0.2C (5-hour rate). Specially built Li- ion brings the operating temperature down to –40°C, but only on discharge and at a reduced discharge. With lead acid we have the danger of the electrolyte freezing, which can crack the enclosure. Lead acid freezes more easily with a low charge when the specific gravity of the electrolyte is more like water.
Cell matching by using cells of similar capacity plays an important role when discharging at low temperature under heavy load. Since the cells in a battery pack can never be perfectly matched, a negative voltage potential can occur across a weaker cell on a multi-cell pack if the discharge is allowed to continue beyond a safe cut-off point. Known as cell reversal, the weak cell suffers damage to the point of developing a permanent electrical short. The larger the cell-count, the greater the likelihood that a cell might reverse under load. Over-discharge at a heavy load and low temperature is a large contributor to thinkpad x60 battery failure of cordless power tools, especially nickel-based packs; Li-ion packs come with protection circuits and the failure rate is lower. Read about Cell Mismatch and Balancing.
Users of electric vehicles need to understand that the driving distance specified per charge is given under normal temperature; frigid cold will sharply reduce the available mileage. Using electricity for cabin heating is not the only cause for the shorter driving distance between charging; the thinkpad x60 battery performance is reduced when cold.
Dell XPS 15 L502X (Sandy Bridge) Review
When we last reviewed the Dell XPS 15, we praised the notebook's strong performance, best-in-class audio, and colorful screen. Now Dell has upgraded its premium 15-incher with Intel's second-generation Core Series processors and Nvidia GeForce GT 500 series graphics, which promise even better performance. We had a chance to test out a high-end $1,488 configuration of the XPS 15, complete with a 2-GHz quad-core Core i7, 8GB of RAM, a 1080p screen, and Nvidia GT540M graphics. These specs promise--and deliver--remarkable processing and media prowess, but is the whole package worth nearly $1,500?
The Dell XPS 15 sports a matte silver anodized aluminum lid that doesn't pick up fingerprints, but it seems a bit dull. Fortunately, Dell offers 200 different Dell Studio lid patterns (an $85 add-on). On the plus side, we appreciate the small black bar that sticks out behind the lid, which has a backlit XPS logo that pulses when the system is asleep. We also like that the matte finish continues on the sides and bottom, areas too often ignored by other notebook makers.
The dark brushed aluminum deck on the inside of the machine and the diamond-cut, silver trim that surround the keyboard and touchpad look more modern. The JBL speakers, which sit on either side of the keyboard, have a unique pattern that looks a bit old-fashioned.
At 15 x 10.4 x 1.5 inches and 6.6 pounds with the nine-cell battery, the XPS 15 is one of the bulkier 15-inch notebooks we've tested. It barely fit into a standard notebook bag, and it weighs a lot more than the 5.6-pound 15-inch MacBook Pro and the IdeaPad Y560d (6.2 pounds). Also, because the nine-cell battery tilts the system upward, the back side increases to 2.25 inches tall.
Throughout our testing, the Dell XPS 15 stayed pleasantly cool. Even after streaming a Hulu video at full screen for 15 minutes, we measured the touchpad at a reasonable 91 degrees Fahrenheit, the keyboard at 93 degrees, and the bottom at 93 degrees. We consider temperatures below 95 degrees comfortable.
At first glance, the XPS 15's keyboard has a lot going for it: an adjustable backlight, large, well-placed keys, and a generous, comfortable palm rest. However, the keys themselves were somewhat stiff. This led us to be more deliberate when typing. We notched a 74 word-per-minute score on the Ten Thumbs Typing Test, 6 wpm lower than our typical average.
Above the keyboard sit a few status lights and three touch-sensitive buttons. The first button launches Windows Mobility Center, a mini control panel that allows you to easily manage your Wi-Fi, Bluetooth, and display settings; we particularly appreciated being able to set the keyboard backlight's brightness. The second button is user-configurable, and the third button launches Dell Audio by Realtek, an audio control center.
The large 3.9 x 2.2-inch touchpad on the XPS 15 offers just the right amount of friction and smoothly executes multitouch gestures such as pinch-to-zoom. It also has two discrete mouse buttons that offer good tactile feedback.
The 15.6-inch, 1920 x 1080 resolution display on the XPS 15 is one of the brightest and most colorful we've tested. Even at viewing angles of nearly 90 degrees to the left or right, images stayed sharp and bright.
The XPS 15 played every video we threw at it without hesitation, from a 1080p QuickTime trailer for Thor to a 720p Episode of Fringe streamed from Fox.com to a Blu-ray movie of Hitch. The screen is so sharp that it exposed some film grain in the Hitch Blu-ray.
The XPS 15 is good enough to serve as your home stereo. The JBL Speakers and bottom-mounted sub-woofer offer incredibly loud and accurate sound. Whether we were listening to a bass-heavy song such as "Forget Me Nots," a funk classic such as Kool and the Gang's "Summer Madness," or a classical tune such as Richard Strauss' "Thus Spake Zarathustra," sound was bright and true, even at maximum volume. In fact, when listening to these songs we were able to hear a clear separation of instruments, from the twanging of the bass line in "Forget Me Nots" to the percussion in "Summer Madness."
The Wave MaxxAudio sound enhancement software plays a huge role in providing this level of fidelity. When you hit the Waves MaxxAudio button that sits above the PrtSrc key, you get a control panel where you can turn MaxxAudio on or off and make fine adjustments to its settings. The software also includes preset levels that are optimized for music, movies, gaming, or voice conferencing. However, our favorite feature is the Leveler, which automatically adjusts your speakers to give you the best possible fidelity at maximum volume, It also has a "midnight" setting that gives you lower volumes for late-night listening.
The Dell XPS 15 has a few high-end ports. On the right side are a headphone jack, a microphone jack, and an S/PDIF connector, along with a USB 2.0/eSATA combo port. On the back, the XPS 15 has an HDMI port, Ethernet, mini DisplayPort, Kensington lock slot, and a USB 3.0 port. On the left side is one more USB 3.0 port. The front lip contains a 9-in-1 card reader. The XPS 15 doesn't have a VGA connection for video output, but that's not a big deal for the target audience.
The 2-megapixel webcam provides 720p video output that works with Skype HD. The low-light performance seems improved over that of the XPS 15 we tested last fall. In both our dim living room and a dark cubicle, we were able to get reasonably bright images when using Skype or taking photos with Dell's Webcam Central software. Dell's software offers a wide array of additional features, including the ability to use one of 10 "avatars" in lieu of your face. These choices include a baby, a kitten, and an alien.
New laptop articles:
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The Dell XPS 15 sports a matte silver anodized aluminum lid that doesn't pick up fingerprints, but it seems a bit dull. Fortunately, Dell offers 200 different Dell Studio lid patterns (an $85 add-on). On the plus side, we appreciate the small black bar that sticks out behind the lid, which has a backlit XPS logo that pulses when the system is asleep. We also like that the matte finish continues on the sides and bottom, areas too often ignored by other notebook makers.
The dark brushed aluminum deck on the inside of the machine and the diamond-cut, silver trim that surround the keyboard and touchpad look more modern. The JBL speakers, which sit on either side of the keyboard, have a unique pattern that looks a bit old-fashioned.
At 15 x 10.4 x 1.5 inches and 6.6 pounds with the nine-cell battery, the XPS 15 is one of the bulkier 15-inch notebooks we've tested. It barely fit into a standard notebook bag, and it weighs a lot more than the 5.6-pound 15-inch MacBook Pro and the IdeaPad Y560d (6.2 pounds). Also, because the nine-cell battery tilts the system upward, the back side increases to 2.25 inches tall.
Throughout our testing, the Dell XPS 15 stayed pleasantly cool. Even after streaming a Hulu video at full screen for 15 minutes, we measured the touchpad at a reasonable 91 degrees Fahrenheit, the keyboard at 93 degrees, and the bottom at 93 degrees. We consider temperatures below 95 degrees comfortable.
At first glance, the XPS 15's keyboard has a lot going for it: an adjustable backlight, large, well-placed keys, and a generous, comfortable palm rest. However, the keys themselves were somewhat stiff. This led us to be more deliberate when typing. We notched a 74 word-per-minute score on the Ten Thumbs Typing Test, 6 wpm lower than our typical average.
Above the keyboard sit a few status lights and three touch-sensitive buttons. The first button launches Windows Mobility Center, a mini control panel that allows you to easily manage your Wi-Fi, Bluetooth, and display settings; we particularly appreciated being able to set the keyboard backlight's brightness. The second button is user-configurable, and the third button launches Dell Audio by Realtek, an audio control center.
The large 3.9 x 2.2-inch touchpad on the XPS 15 offers just the right amount of friction and smoothly executes multitouch gestures such as pinch-to-zoom. It also has two discrete mouse buttons that offer good tactile feedback.
The 15.6-inch, 1920 x 1080 resolution display on the XPS 15 is one of the brightest and most colorful we've tested. Even at viewing angles of nearly 90 degrees to the left or right, images stayed sharp and bright.
The XPS 15 played every video we threw at it without hesitation, from a 1080p QuickTime trailer for Thor to a 720p Episode of Fringe streamed from Fox.com to a Blu-ray movie of Hitch. The screen is so sharp that it exposed some film grain in the Hitch Blu-ray.
The XPS 15 is good enough to serve as your home stereo. The JBL Speakers and bottom-mounted sub-woofer offer incredibly loud and accurate sound. Whether we were listening to a bass-heavy song such as "Forget Me Nots," a funk classic such as Kool and the Gang's "Summer Madness," or a classical tune such as Richard Strauss' "Thus Spake Zarathustra," sound was bright and true, even at maximum volume. In fact, when listening to these songs we were able to hear a clear separation of instruments, from the twanging of the bass line in "Forget Me Nots" to the percussion in "Summer Madness."
The Wave MaxxAudio sound enhancement software plays a huge role in providing this level of fidelity. When you hit the Waves MaxxAudio button that sits above the PrtSrc key, you get a control panel where you can turn MaxxAudio on or off and make fine adjustments to its settings. The software also includes preset levels that are optimized for music, movies, gaming, or voice conferencing. However, our favorite feature is the Leveler, which automatically adjusts your speakers to give you the best possible fidelity at maximum volume, It also has a "midnight" setting that gives you lower volumes for late-night listening.
The Dell XPS 15 has a few high-end ports. On the right side are a headphone jack, a microphone jack, and an S/PDIF connector, along with a USB 2.0/eSATA combo port. On the back, the XPS 15 has an HDMI port, Ethernet, mini DisplayPort, Kensington lock slot, and a USB 3.0 port. On the left side is one more USB 3.0 port. The front lip contains a 9-in-1 card reader. The XPS 15 doesn't have a VGA connection for video output, but that's not a big deal for the target audience.
The 2-megapixel webcam provides 720p video output that works with Skype HD. The low-light performance seems improved over that of the XPS 15 we tested last fall. In both our dim living room and a dark cubicle, we were able to get reasonably bright images when using Skype or taking photos with Dell's Webcam Central software. Dell's software offers a wide array of additional features, including the ability to use one of 10 "avatars" in lieu of your face. These choices include a baby, a kitten, and an alien.
New laptop articles:
latitude d830 Battery ,inspiron 510m battery ,vostro 1700 battery ,latitude d630 battery ,solar radio emergency,
2011年5月7日星期六
HP Laptop Decoder Ring
HP, in particular, has a huge variety of notebooks. On one end is a cadre of affordably-priced Pavilion machines and at another are high-end multimedia laptops that rival Apple’s sleekest systems. Then you have a whole separate line of laptops for business users. To guide you through HP’s catalog, here’s a summary of each lineup.
HP’s line of 10.1-inch netbooks include two models: the Mini 110 and the Mini 210 (pictured). The first number in the naming convention refers to the generation of the line, and the last two numbers reference the netbooks’ size. Both machines offer an Intel Atom N455 processor and Intel GMA 3150 graphics, but the Mini includes a 3-cell battery. The newer 210 packs a 6-cell option.
Don’t expect many models here. The all-over jet black HP G series features two laptops built for everyday computing tasks like surfing the web, social networking, and watching online video. The G62m houses Intel Celeron processors, but the G62x, gets into gear with a modern Core i3 370M CPU.
The HP Pavilion line is easily the manufacturer’s largest notebook family. It starts at the ultraportable 11-inch Pavilion dm1z (pictured) and climbs all the way to 17-inch quad-core rigs. In between, about a dozen sharp-looking machines are divided into the DM, G, and DV series, and come in a wide variety of chassis designs. The DM series includes HP’s ultraportables; the G series includes value-priced 14-, 15-, and 17-inch notebooks; and the DV series (15- and 17-inch) is all about multimedia and entertainment, with features like premium sound and discrete graphics.
These four notebooks are HP’s multimedia powerhouses. Available in 14- and 17.3-inch configurations, HP Envy laptops provide a strong mix of style and entertainment. For example, each notebook is designed with a minimalist flare and includes Beats audio sound. Depending on the system, an Envy can pack heavy-hitting A/V perks. The list includes ATI discrete graphics for video, a set of Beats headphones, or a 3D display (HP Envy 17 only).
The HP Essential family is marketed toward small and medium-sized businesses who don’t need a lot of computing power. Many of the notebooks contain bargain-priced CPUs like the Intel Pentium T4500 or the AMD PhenomII.
The Essential is comprised of two notebooks: the 3105m is 11.6-inches and includes a modern AMD E-350 processor, and the 600 series offers several 15.6-inch machines that can house Intel Celeron, Core 2 Duo, or Pentium processors or equally low-end AMD chip selections as well.
There’s just one machine in this family: the TouchSmart tm2t, a 12.1 inch tablet with a convertible display and an emphasis on entertainment with specs like HDMI, Dolby digital sound, and Altec Lansing speakers.
The HP ProBook lineup offers something for every mobile professional – from roaming salespeople and real estate agents who need the lightweight mobility of the 5-pound 4420s and 4520s to engineers and designers that require big displays and bigger performance, as found in the 17-inch 4720s, which uses an ATI Radeon HD graphics card. There’s even TPM software for encrypting important files and fingerprint readers to lock down notebooks in case the device lands in the wrong hands.
Screen Size: In the Pavilion line, the single number corresponds to the second digit of the screen size. The dm1z, for instance, is 11.1 inches. In some instance, the number represents the display’s estimated size. The dv5t has a 14.5-inch display, so the 5 represents 15 inches, instead.
Elitebooks and ProBooks have more numbers in the product name, so it is the second number that refers to the screen size. For instance, the Elitebook 8440w and 8460p both contain 14-inch displays. Exceptions to the rule are the Elitebook 2540p and 2740p, both 12.1 inches. For those systems, it is the first digit that corresponds to the second digit of the display size.
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HP’s line of 10.1-inch netbooks include two models: the Mini 110 and the Mini 210 (pictured). The first number in the naming convention refers to the generation of the line, and the last two numbers reference the netbooks’ size. Both machines offer an Intel Atom N455 processor and Intel GMA 3150 graphics, but the Mini includes a 3-cell battery. The newer 210 packs a 6-cell option.
Don’t expect many models here. The all-over jet black HP G series features two laptops built for everyday computing tasks like surfing the web, social networking, and watching online video. The G62m houses Intel Celeron processors, but the G62x, gets into gear with a modern Core i3 370M CPU.
The HP Pavilion line is easily the manufacturer’s largest notebook family. It starts at the ultraportable 11-inch Pavilion dm1z (pictured) and climbs all the way to 17-inch quad-core rigs. In between, about a dozen sharp-looking machines are divided into the DM, G, and DV series, and come in a wide variety of chassis designs. The DM series includes HP’s ultraportables; the G series includes value-priced 14-, 15-, and 17-inch notebooks; and the DV series (15- and 17-inch) is all about multimedia and entertainment, with features like premium sound and discrete graphics.
These four notebooks are HP’s multimedia powerhouses. Available in 14- and 17.3-inch configurations, HP Envy laptops provide a strong mix of style and entertainment. For example, each notebook is designed with a minimalist flare and includes Beats audio sound. Depending on the system, an Envy can pack heavy-hitting A/V perks. The list includes ATI discrete graphics for video, a set of Beats headphones, or a 3D display (HP Envy 17 only).
The HP Essential family is marketed toward small and medium-sized businesses who don’t need a lot of computing power. Many of the notebooks contain bargain-priced CPUs like the Intel Pentium T4500 or the AMD PhenomII.
The Essential is comprised of two notebooks: the 3105m is 11.6-inches and includes a modern AMD E-350 processor, and the 600 series offers several 15.6-inch machines that can house Intel Celeron, Core 2 Duo, or Pentium processors or equally low-end AMD chip selections as well.
There’s just one machine in this family: the TouchSmart tm2t, a 12.1 inch tablet with a convertible display and an emphasis on entertainment with specs like HDMI, Dolby digital sound, and Altec Lansing speakers.
The HP ProBook lineup offers something for every mobile professional – from roaming salespeople and real estate agents who need the lightweight mobility of the 5-pound 4420s and 4520s to engineers and designers that require big displays and bigger performance, as found in the 17-inch 4720s, which uses an ATI Radeon HD graphics card. There’s even TPM software for encrypting important files and fingerprint readers to lock down notebooks in case the device lands in the wrong hands.
Screen Size: In the Pavilion line, the single number corresponds to the second digit of the screen size. The dm1z, for instance, is 11.1 inches. In some instance, the number represents the display’s estimated size. The dv5t has a 14.5-inch display, so the 5 represents 15 inches, instead.
Elitebooks and ProBooks have more numbers in the product name, so it is the second number that refers to the screen size. For instance, the Elitebook 8440w and 8460p both contain 14-inch displays. Exceptions to the rule are the Elitebook 2540p and 2740p, both 12.1 inches. For those systems, it is the first digit that corresponds to the second digit of the display size.
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2011年5月5日星期四
A Hidden Magnetic Effect
A dramatic and surprising magnetic effect of light discovered by University of Michigan researchers could lead to solar power(solar radio emergency) without traditional semiconductor-based solar cells.
The researchers found a way to make an "optical battery," said Stephen Rand, a professor in the departments of Electrical Engineering and Computer Science, Physics and Applied Physics.
In the process, they overturned a century-old tenet of physics.
"You could stare at the equations of motion all day and you will not see this possibility. We've all been taught that this doesn't happen," said Rand, an author of a paper on the work published in the Journal of Applied Physics. "It's a very odd interaction. That's why it's been overlooked for more than 100 years."
Light has electric and magnetic components. Until now, scientists thought the effects of the magnetic field were so weak that they could be ignored. What Rand and his colleagues found is that at the right intensity, when light is traveling through a material that does not conduct electricity,solar radio emergency , the light field can generate magnetic effects that are 100 million times stronger than previously expected. Under these circumstances, the magnetic effects develop strength equivalent to a strong electric effect.
"This could lead to a new kind of solar cell,solar radio emergency without semiconductors and without absorption to produce charge separation," Rand said. "In solar cells, the light goes into a material, gets absorbed and creates heat. Here, we expect to have a very low heat load. Instead of the light being absorbed, energy is stored in the magnetic moment. Intense magnetization can be induced by intense light and then it is ultimately capable of providing a capacitive power source."
What makes this possible is a previously undetected brand of "optical rectification," says William Fisher, a doctoral student in applied physics. In traditional optical rectification, light's electric field causes a charge separation, or a pulling apart of the positive and negative charges in a material. This sets up a voltage, similar to that in a battery. This electric effect had previously been detected only in crystalline materials that possessed a certain symmetry.
Rand and Fisher found that under the right circumstances and in other types of materials, the light's magnetic field can also create optical rectification,inspiron 510m battery.
"It turns out that the magnetic field starts curving the electrons into a C-shape and they move forward a little each time," Fisher said. "That C-shape of charge motion generates both an electric dipole and a magnetic dipole. If we can set up many of these in a row in a long fiber, we can make a huge voltage and by extracting that voltage, we can use it as a power source."
The light must be shone through a material that does not conduct electricity,inspiron 510m battery , such as glass. And it must be focused to an intensity of 10 million watts per square centimeter. Sunlight isn't this intense on its own, but new materials are being sought that would work at lower intensities, Fisher said.
"In our most recent paper, we show that incoherent light like sunlight is theoretically almost as effective in producing charge separation as laser light is," Fisher said.
This new technique could make solar power cheaper, the researchers say. They predict that with improved materials they could achieve 10 percent efficiency in converting solar power to useable energy. That's equivalent to today's commercial-grade solar cells.
"To manufacture modern solar cells,li-ion cell inspiron 510m battery,you have to do extensive semiconductor processing," Fisher said. "All we would need are lenses to focus the light and a fiber to guide it. Glass works for both. It's already made in bulk, and it doesn't require as much processing. Transparent ceramics might be even better."
In experiments this summer, the researchers will work on harnessing this power with laser light, and then with sunlight.
The paper is titled "Optically-induced charge separation and terahertz emission in unbiased dielectrics." The university is pursuing patent protection for the intellectual property.
The researchers found a way to make an "optical battery," said Stephen Rand, a professor in the departments of Electrical Engineering and Computer Science, Physics and Applied Physics.
In the process, they overturned a century-old tenet of physics.
"You could stare at the equations of motion all day and you will not see this possibility. We've all been taught that this doesn't happen," said Rand, an author of a paper on the work published in the Journal of Applied Physics. "It's a very odd interaction. That's why it's been overlooked for more than 100 years."
Light has electric and magnetic components. Until now, scientists thought the effects of the magnetic field were so weak that they could be ignored. What Rand and his colleagues found is that at the right intensity, when light is traveling through a material that does not conduct electricity,solar radio emergency , the light field can generate magnetic effects that are 100 million times stronger than previously expected. Under these circumstances, the magnetic effects develop strength equivalent to a strong electric effect.
"This could lead to a new kind of solar cell,solar radio emergency without semiconductors and without absorption to produce charge separation," Rand said. "In solar cells, the light goes into a material, gets absorbed and creates heat. Here, we expect to have a very low heat load. Instead of the light being absorbed, energy is stored in the magnetic moment. Intense magnetization can be induced by intense light and then it is ultimately capable of providing a capacitive power source."
What makes this possible is a previously undetected brand of "optical rectification," says William Fisher, a doctoral student in applied physics. In traditional optical rectification, light's electric field causes a charge separation, or a pulling apart of the positive and negative charges in a material. This sets up a voltage, similar to that in a battery. This electric effect had previously been detected only in crystalline materials that possessed a certain symmetry.
Rand and Fisher found that under the right circumstances and in other types of materials, the light's magnetic field can also create optical rectification,inspiron 510m battery.
"It turns out that the magnetic field starts curving the electrons into a C-shape and they move forward a little each time," Fisher said. "That C-shape of charge motion generates both an electric dipole and a magnetic dipole. If we can set up many of these in a row in a long fiber, we can make a huge voltage and by extracting that voltage, we can use it as a power source."
The light must be shone through a material that does not conduct electricity,inspiron 510m battery , such as glass. And it must be focused to an intensity of 10 million watts per square centimeter. Sunlight isn't this intense on its own, but new materials are being sought that would work at lower intensities, Fisher said.
"In our most recent paper, we show that incoherent light like sunlight is theoretically almost as effective in producing charge separation as laser light is," Fisher said.
This new technique could make solar power cheaper, the researchers say. They predict that with improved materials they could achieve 10 percent efficiency in converting solar power to useable energy. That's equivalent to today's commercial-grade solar cells.
"To manufacture modern solar cells,li-ion cell inspiron 510m battery,you have to do extensive semiconductor processing," Fisher said. "All we would need are lenses to focus the light and a fiber to guide it. Glass works for both. It's already made in bulk, and it doesn't require as much processing. Transparent ceramics might be even better."
In experiments this summer, the researchers will work on harnessing this power with laser light, and then with sunlight.
The paper is titled "Optically-induced charge separation and terahertz emission in unbiased dielectrics." The university is pursuing patent protection for the intellectual property.
2011年5月4日星期三
examination done for laptop battery
It is precisely because of the portability notebook did not come until everyone's favorite, but if a laptop is not a high-quality notebook batteries , notebook can not guarantee the stability of long hours of work, the use of laptop notebook must have an external power supply, then lost the notebook on its own significance. But batteries are consumables, work to stabilize the general time in a year or so, then it may "suddenly dead." If you are planning to buy laptop computers,laptop battery would need to do a physical examination in order to detect the battery problem.
Windows XP comes with the use of the procedure can check the battery status and the use of time estimates. Fully charged battery first, and then unplug the power adapter notebook. Into the "Control Panel", open the "Power Options", see "Power List" option in the remaining laptop battery power, this time can be estimated based on the current operation of the program can also use battery time, click the "batteries for more information" also can be seen that the battery models, manufacturers and other relevant information. However, this method results in a single test, and as a result of the operation of the different circumstances there will be differences in power consumption, therefore, the credibility of test results is not high.
There are laptop battery is designed to test the software, use the software testing can be obtained of the degree of information than the system testing will be high, there is USB friends, we might as well take the time to buy these second-hand notebook peer software. 1. Battery Mon "Battery Mon" is a shared software, you can use before registration for 30 days. "Battery Mon" to reflect detailed information on batteries, can record xps m1330 battery discharge curve is smooth, but also according to the actual rate of decline in electricity consumption is estimated that the use of battery time, and software and built-in contrast to standard time. And the relatively short test time. Step 1 First of all, the battery fully charged, and then run the "Battery Mon" and unplug the external power supply. Step 2 Click "Start" after, "Battery Mon" to start recording on the decline curve of battery power. About 2 ~ 10 minutes after
Will generally depict the curve of the decline in consumption, when in the "Comparison Rate" and you select a power curve of the measured inclination of the most similar to the standard curve, so that batteries can be generally aware of how long it will be able to use. Click the lower left-hand corner Tips "Battery Info" button, you can view detailed information about the xps m1330 battery. Although the "Battey Mon" to provide estimates of the use of battery time, but this time in real time in accordance with the current calculation of the drop in consumption, so that testing methodology is not sufficiently rigorous, but it is simple and convenient operation, suitable for beginners to use. 2. Battery Mark "Battery Mark" is an old dell xps M1530 battery test software. "Battery Mark" Built-four engine, four engine to make use of this comprehensive test of the specific circumstances of the notebook battery. Step 1 will be fully charged battery, run "Battery Mark" (At this time there is no need to unplug the power), follow the prompts to enter your basic information. Step 2 to enter the main interface can be seen after four
Option. First click on "Run", then "Battery Mark" on the basis of testing a number of systems, if not the configuration of the notebook will not be able to run this program. If passed the test, click on "Finish" to enter the test page. Step 3 here "Battery Mark" program offers two tests: Conditioning Run and Life Test. Conditioning Run is called Graphics engine (Image engine), Processor engine (processor engine) and Disk engine (disk engine) that three engines, and in this between the three non-stop cycle of the engine switch to simulate the actual use of notebooks "torture", quickly drain battery power. Life Test and the relative number of Conditioning Run a Think engine (thinking engine), but this process is the simulation we use in the process of peace will be carried out with the testing process has become longer and longer. Normally you can not have been running the program, there will be time to think. As a result of more Think ngine, Life Test of Conditioning Run time will be extended for more than 30% ~ 40%. When you choose a good test program, press F3 to start the formal testing, and then need to first unplug the power adapter. When the battery test, after a few hours after consumption of photovoltaic capacity, the system will automatically shut down when power adapter to plug in, boot after the "Battery Mark" will be automatically run and test results are displayed. How to, the operation of these two software will not be difficult for you? Whether you want to still want to buy second-hand xps M1530 battery for their physical examination to look, choose one can be a good
Test results. Tips In general, notebook battery life of 300 ~ 500 times, so do not test the battery regularly.
Procedures for measuring systems
Windows XP comes with the use of the procedure can check the battery status and the use of time estimates. Fully charged battery first, and then unplug the power adapter notebook. Into the "Control Panel", open the "Power Options", see "Power List" option in the remaining laptop battery power, this time can be estimated based on the current operation of the program can also use battery time, click the "batteries for more information" also can be seen that the battery models, manufacturers and other relevant information. However, this method results in a single test, and as a result of the operation of the different circumstances there will be differences in power consumption, therefore, the credibility of test results is not high.
Using specialized software testing
There are laptop battery is designed to test the software, use the software testing can be obtained of the degree of information than the system testing will be high, there is USB friends, we might as well take the time to buy these second-hand notebook peer software. 1. Battery Mon "Battery Mon" is a shared software, you can use before registration for 30 days. "Battery Mon" to reflect detailed information on batteries, can record xps m1330 battery discharge curve is smooth, but also according to the actual rate of decline in electricity consumption is estimated that the use of battery time, and software and built-in contrast to standard time. And the relatively short test time. Step 1 First of all, the battery fully charged, and then run the "Battery Mon" and unplug the external power supply. Step 2 Click "Start" after, "Battery Mon" to start recording on the decline curve of battery power. About 2 ~ 10 minutes after
Will generally depict the curve of the decline in consumption, when in the "Comparison Rate" and you select a power curve of the measured inclination of the most similar to the standard curve, so that batteries can be generally aware of how long it will be able to use. Click the lower left-hand corner Tips "Battery Info" button, you can view detailed information about the xps m1330 battery. Although the "Battey Mon" to provide estimates of the use of battery time, but this time in real time in accordance with the current calculation of the drop in consumption, so that testing methodology is not sufficiently rigorous, but it is simple and convenient operation, suitable for beginners to use. 2. Battery Mark "Battery Mark" is an old dell xps M1530 battery test software. "Battery Mark" Built-four engine, four engine to make use of this comprehensive test of the specific circumstances of the notebook battery. Step 1 will be fully charged battery, run "Battery Mark" (At this time there is no need to unplug the power), follow the prompts to enter your basic information. Step 2 to enter the main interface can be seen after four
Option. First click on "Run", then "Battery Mark" on the basis of testing a number of systems, if not the configuration of the notebook will not be able to run this program. If passed the test, click on "Finish" to enter the test page. Step 3 here "Battery Mark" program offers two tests: Conditioning Run and Life Test. Conditioning Run is called Graphics engine (Image engine), Processor engine (processor engine) and Disk engine (disk engine) that three engines, and in this between the three non-stop cycle of the engine switch to simulate the actual use of notebooks "torture", quickly drain battery power. Life Test and the relative number of Conditioning Run a Think engine (thinking engine), but this process is the simulation we use in the process of peace will be carried out with the testing process has become longer and longer. Normally you can not have been running the program, there will be time to think. As a result of more Think ngine, Life Test of Conditioning Run time will be extended for more than 30% ~ 40%. When you choose a good test program, press F3 to start the formal testing, and then need to first unplug the power adapter. When the battery test, after a few hours after consumption of photovoltaic capacity, the system will automatically shut down when power adapter to plug in, boot after the "Battery Mark" will be automatically run and test results are displayed. How to, the operation of these two software will not be difficult for you? Whether you want to still want to buy second-hand xps M1530 battery for their physical examination to look, choose one can be a good
Test results. Tips In general, notebook battery life of 300 ~ 500 times, so do not test the battery regularly.
2011年5月3日星期二
growing trend in notebook computers
There is a growing trend in notebook computers which could put you in harms way. Since the recent discovery of thousands of defective notebook batteries being used in many of the most popular brands, explosion and heat related injuries have been on the rise. Even though the majority of notebooks are using stable laptop battery, most systems are so powerful now that the user is still not free and clear of potential burns during routine use. Most users will agree that the term laptop may no longer apply, as the aptly named devices are showing up less and less on a users lap.
Small and inexpensive “netbooks” were some of the most popular computers in the recession, wooing consumers with their portability and prices that were often below $400.Now with the economy improving, consumers will be asked to open their wallets to new styles of computers, including some costing a bit more.
Winning at the 2010 IF design awards, this stylish, feature rich netbook encapusulates an enviable list of features deigned to provide the optimum netbook experience. Packed into an extremely slim 1” frame and weighing just 1kg, the U160 punches way above its weight as its Intel Atom N450 processor affords low consumption, low heat generation and ultra-economomical power usage while offering above 9 hours of extended laptop battery life.
While at the Dell suite at CES 2010, I took the opportunity to play with the all-new Lenovo(xps m1330 battery) Inspiron Mini 10. Despite having the same name as its predecessor, this is a substantially different design: in particular, the hinge is now set back around an inch from the rear edge, which allows future designs to integrated more ports at the back. For now, though, only the power input has moved.
ARM, Qualcomm and Google are doing their level best to derail Intel's plans to dominate the small, cheap laptop market that's currently characterised by the burgeoning netbook.Their hopes rest with the smartbook - an always-on, always-connected device that's an extension of a smartphone rather than a shrunken-down notebook. Smartbooks and netbooks share a fairly similar form factor, though.
The new year is a good time for notebook PC users to get thin, and by that we mean the actual notebooks they should be using.
A wide range of new IT products in really thin form factors came out toward the end of 2009 and are now expected to become big this year. Those that have shed a lot of weight are new notebooks from Asus, Dell and Lenovo(xps m1330 battery), but even desktop monitors are also losing their heft to sport a much slimmer profile.
Netbooks are these little, tiny underpowered PCs that are becoming more popular among a small segment of the computing world, including high-school students who often have them forced upon them by unsuspecting school boards.
From a projector that can turn any flat surface into a touchscreen to a mind-boggling iPhone-controlled mini-helicopter, the devices on show ranged from the useful to the downright ridiculous.
After your loved ones have shelled out, in some cases, hundreds of dollars to deliver the gift of GPS units, cell phones and MP3 players, you'll want to keep them in tip-top shape. But grimy touch screens, cell phones dropped in water and fast-draining laptop batteries can ruin your fun.
The Consumer Electronics Show (CES) in Las Vegas serves many purposes for PC manufacturers and software makers. OEMs can display their traditional workhorses, Lenovo(xps m1330 battery)’s ThinkPad line, for example, to show updates such as more powerful processors. These same companies can also show off some of their exotic creations, such as the Kohjinsha DZ Series laptop and its two 10.1-inch screens that slide out into one giant widescreen. Whatever the case, CES proves that there’s a PC for just about anybody’s needs. The following are some of the most interesting PCs found during first day of the event.
Every month we let you know which Laptop computers we see with the highest user ratings and most sales around – this month the top three contenders for laptop computers aren’t the typical front runners like Lenovo(xps m1330 battery) or Apple – no, in fact, this month the top three positions go to Asus, HP and Toshiba!
Small and inexpensive “netbooks” were some of the most popular computers in the recession, wooing consumers with their portability and prices that were often below $400.Now with the economy improving, consumers will be asked to open their wallets to new styles of computers, including some costing a bit more.
Winning at the 2010 IF design awards, this stylish, feature rich netbook encapusulates an enviable list of features deigned to provide the optimum netbook experience. Packed into an extremely slim 1” frame and weighing just 1kg, the U160 punches way above its weight as its Intel Atom N450 processor affords low consumption, low heat generation and ultra-economomical power usage while offering above 9 hours of extended laptop battery life.
While at the Dell suite at CES 2010, I took the opportunity to play with the all-new Lenovo(xps m1330 battery) Inspiron Mini 10. Despite having the same name as its predecessor, this is a substantially different design: in particular, the hinge is now set back around an inch from the rear edge, which allows future designs to integrated more ports at the back. For now, though, only the power input has moved.
ARM, Qualcomm and Google are doing their level best to derail Intel's plans to dominate the small, cheap laptop market that's currently characterised by the burgeoning netbook.Their hopes rest with the smartbook - an always-on, always-connected device that's an extension of a smartphone rather than a shrunken-down notebook. Smartbooks and netbooks share a fairly similar form factor, though.
The new year is a good time for notebook PC users to get thin, and by that we mean the actual notebooks they should be using.
A wide range of new IT products in really thin form factors came out toward the end of 2009 and are now expected to become big this year. Those that have shed a lot of weight are new notebooks from Asus, Dell and Lenovo(xps m1330 battery), but even desktop monitors are also losing their heft to sport a much slimmer profile.
Netbooks are these little, tiny underpowered PCs that are becoming more popular among a small segment of the computing world, including high-school students who often have them forced upon them by unsuspecting school boards.
From a projector that can turn any flat surface into a touchscreen to a mind-boggling iPhone-controlled mini-helicopter, the devices on show ranged from the useful to the downright ridiculous.
After your loved ones have shelled out, in some cases, hundreds of dollars to deliver the gift of GPS units, cell phones and MP3 players, you'll want to keep them in tip-top shape. But grimy touch screens, cell phones dropped in water and fast-draining laptop batteries can ruin your fun.
The Consumer Electronics Show (CES) in Las Vegas serves many purposes for PC manufacturers and software makers. OEMs can display their traditional workhorses, Lenovo(xps m1330 battery)’s ThinkPad line, for example, to show updates such as more powerful processors. These same companies can also show off some of their exotic creations, such as the Kohjinsha DZ Series laptop and its two 10.1-inch screens that slide out into one giant widescreen. Whatever the case, CES proves that there’s a PC for just about anybody’s needs. The following are some of the most interesting PCs found during first day of the event.
Every month we let you know which Laptop computers we see with the highest user ratings and most sales around – this month the top three contenders for laptop computers aren’t the typical front runners like Lenovo(xps m1330 battery) or Apple – no, in fact, this month the top three positions go to Asus, HP and Toshiba!
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