The secrets of battery runtime

Is the runtime of a portable device directly related to the size of the laptop battery? The answer should be 'yes' but in reality, the runtime is governed by other attributes than the specified capacity alone.

This paper examines the cause of unexpected downtime and short battery service life. We look at four renegades - declining capacity, increasing internal resistance, elevated self-discharge and premature voltage cut-off on discharge. We evaluate how these regenerative deficiencies affect nickel, lead and lithium-based batteries. Declining capacity The amount of charge a laptop battery can hold gradually decreases due to usage and aging. Specified to deliver 100% capacity when new, the battery should be replaced when the capacity drops to below 80% of the nominal rating. Some organizations may use different end-capacities as a minimal acceptable performance threshold.

The energy storage of a battery can be divided into three imaginary sections consisting of: available energy, the empty zone that can be refilled, and the unusable part (rock content) that increases with aging. Figure 1 illustrates these three sections.

Figure 1: Dell laptop Battery charge capacity.Three imaginary sections of a battery consisting of available energy, empty zone and rock content.

In nickel-based batteries, the so-called rock content is present in form of crystalline formation, also known as memory. Restoration is possible with a full discharge to one volt per cell. However, if no service is done for four months and longer, a full repair becomes increasingly more difficult the longer service is withheld. To prevent memory, nickel-based batteries should be deep-cycled once every one or two months. Nickel-cadmium and nickel-metal-hydride batteries are used for two-way radios, medical instruments and power tools.

Performance degradation of the lead-acid battery is caused by sulfation and grid corrosion. Sulfation is a thin layer that forms on the negative cell plate if the battery is being denied a fully saturated charge. Sulfation can, in part, be corrected with cycling and/or topping charge. The Battery grid corrosion, which occurs on the positive plate, is caused by over-charge. Lead-acid batteries are used for larger portable devices and wheeled applications.

Lithium-ion Toshiba laptop batteries lose capacity through cell oxidation, a process that occurs naturally during use and aging. The typical life span of lithium-ion is 2-3 years under normal use. Cool storage a 40% charge minimizes aging. An aged lithium-ion cannot be restored with cycling. Lithium-ion is found in cell phones and mobile computing.

Increasing internal Resistance The capacity of a battery defines the stored energy - the internal resistance governs how much energy can be delivered at any given time. While a good battery is able to provide high current on demand, the voltage of a battery with elevated resistance collapses under a heavy load. Although the battery may hold sufficient capacity, the resulting voltage drop triggers the 'low battery' indicator and the equipment stops functioning. Heating the battery will momentarily increase the output by lowering the resistance.

A battery with high internal resistance may still perform adequately on a low current appliance such as a flashlight, portable CD player or wall clock. Digital Camera battery equipment, on the other hand, draw heavy current bursts. Figure 2 simulates low and high internal resistance with a free-flowing and restricted tap.

Figure 2: Effects of internal battery resistance.A battery with low internal resistance is able to provide high current on demand. With elevated resistance, the battery voltage collapses and the equipment cuts off.

Nickel-cadmium offers very low internal resistance and delivers high current on demand. In comparison, nickel-metal-hydride starts with a slightly higher resistance and the readings increase rapidly after 300 to 400 cycles.

Lithium-ion has a slightly higher internal resistance than nickel-based batteries. The cobalt system tends to increase the internal resistance as part of aging whereas the manganese (spinel) maintains the resistance throughout Apple laptop battery life but loses capacity through chemical reaction. Cobalt and manganese are used for the positive electrodes.

High internal resistance will eventually render the battery useless. The energy may still be present but can no longer be delivered. This condition is permanent and cannot be reversed with cycling. Cool storage at a partial state-of-charged (40%) retards the aging process.

The internal resistance of Lead-acid batteries is very low. The A1175 A1185 battery responds well to short current bursts but has difficulty providing a high, sustained load. Over time, the internal resistance increases through sulfation and grid corrosion.

Elevated self-discharge

All HP laptop batteries suffer from self-discharge, of which nickel-based batteries are among the highest. The loss is asymptotical, meaning that the self-discharge is highest right after charge and then levels off. nickel-based batteries lose 10% to 15% of their capacity in the first 24 hours after charge, then 10% to 15% per month afterwards. One of the best batteries in terms of self-discharge is Lead-acid; it only self-discharges 5% per month. Unfortunately, this chemistry has the lowest energy density and is ill suited for portable applications. lithium-ion self-discharges about 5% in the first 24 hours and 1-2% afterwards. Adding the protection circuit increases the discharge by another 3% per month. The protection circuit assures that the voltage and current on each cell does not exceed a safe limit. Figure 3 illustrates a battery with high self-discharge.

Figure 3: Effects of high load impedance.Self-discharge increases with age, high cycle count and elevated temperature. Discard a battery if the self-discharge reaches 30% in 24 hours.

The self-discharge on all battery chemistries increase at higher temperatures. Typically, the rate doubles with every 10°C (18°F). A noticeable energy loss occurs if a battery is left in a hot vehicle.

Aging and usage also affect self-discharge. nickel-metal-hydride is good for 300-400 cycles, whereas nickel-cadmium may last over 1000 cycles before high self-discharge affects the performance. An older nickel-based Sony laptop battery may lose its energy during the day through self-discharge rather than actual use. Discard a battery if the self-discharge reaches 30% in 24 hours.

Nothing can be done to reverse this deficiency. Factors that accelerate self-discharge are damaged separators induced by crystalline formation, allowing the packs to cook while charging, and high cycle count, which promotes swelling in the cell. Lead and lithium-based batteries do not increase the self-discharge with use in the same manner as their nickel-based cousins do. Premature voltage cut-off Not all stored battery power can be fully utilized. Some equipment cuts off before the designated end-of-discharge voltage is reached and precious battery energy remains unused. Applications demanding high current bursts push the battery voltage to an early cut-off. This is especially visible on iBook G4 battery with elevated internal resistance. The voltage recovers when the load is removed and the battery appears normal. Discharging such a battery on a moderate load with a battery analyzer to the respective end-of-discharge threshold will sometimes produce residual capacity readings of 30% and higher, jet the battery is inoperable in the equipment. Figure 4 illustrates high cut-off voltage.

Figure 4: Illustration of equipment with high cut-off voltage.Some portable devices do not utilize all available battery power and leave precious energy behind.

High internal battery resistance and the equipment itself are not the only cause of premature voltage cut-off - warm temperature also plays a role by lowering the battery voltage. Other reasons are shorted cells in a multi-cell battery pack and memory on nickel-based batteries.

The article is from http://www.batteryuniversity....

What causes laptop batteries to overheat?

In conjunction with the United States Consumer Product Safety Commission (CPSC), Dell and Apple Computer announced large recalls of laptop batteries in the summer of 2006, followed by Toshiba and Lenovo. Sony manufactured all of the recalled batteries, and in October 2006, the company announced its own large-scale recall. Under the right circumstances, these batteries could overheat, potentially causing burns, an explosion or a fire.

To understand why that happened, it's helpful to know a little bit about how batteries work. Laptop Batteries have a negatively charged terminal and a positively charged terminal. In a battery, energy from electrochemical reactions causes electrons (negatively charged particles) to collect at the battery's negatively charged pole. Charged particles are attracted to opposite charge, so if you connect a battery to a circuit, the electrons will flow from the negative pole, through the circuit and to the Inspiron 1501 battery's positively charged pole. In other words, the battery generates a moving charge, or electricity. (See How Electricity Works and How Batteries Work for more details).

The exact reaction that generates the electrons varies, depending on the type of 40Y6797 battery. In a lithium-ion battery, you'll find pressurized containers that house a coil of metal and a flammable, lithium-containing liquid. The manufacturing process creates tiny pieces of metal that float in the liquid. Manufacturers can't completely prevent these metal fragments, but good manufacturing techniques limit their size and number. The cells of a lithium-ion Pavilion DV2000 battery also contain separators that keep the anodes and cathodes, or positive and negative poles, from touching each other.

If the Acer Aspire One battery gets hot through use or recharging, the pieces of metal can move around, much like grains of rice in a pot of water. If a piece of metal gets too close to the separator, it can puncture the separator and cause a short circuit. There are a few possible scenarios for what can go wrong in the case of a short circuit:

If it creates a spark, the flammable liquid can ignite, causing a fire.
If it causes the temperature inside the battery to rise rapidly, the A1175 A1185 battery can explode due to the increased pressure.
If it causes the temperature to rise slowly, the battery can melt, and the liquid inside can leak out.
- There are several reasons why- multiple laptop battery models have been recalled in the past few years. People want small, lightweight laptops that they can use for long periods. They also want their laptops to have bright screens and lots of processing power. For these reasons, laptop batteries have to be relatively small, but they also have to hold a lot of energy and last a long time.

Making lithium-ion Inspiron 640m battery that can hold more power for a longer period requires vital components, including the separators, to be small and thin. The reduction in size makes it more likely that the batteries can fail, break, leak or short circuit.

Check out the next page for more information-, including how to determine if the recall affects your laptop.

What causes laptop batteries to overheat?

In conjunction with the United States Consumer Product Safety Commission (CPSC), Dell and Apple Computer announced large recalls of laptop batteries in the summer of 2006, followed by Toshiba and Lenovo. Sony manufactured all of the recalled batteries, and in October 2006, the company announced its own large-scale recall. Under the right circumstances, these batteries could overheat, potentially causing burns, an explosion or a fire.

To understand why that happened, it's helpful to know a little bit about how batteries work. Laptop Batteries have a negatively charged terminal and a positively charged terminal. In a battery, energy from electrochemical reactions causes electrons (negatively charged particles) to collect at the battery's negatively charged pole. Charged particles are attracted to opposite charge, so if you connect a battery to a circuit, the electrons will flow from the negative pole, through the circuit and to the Inspiron 1501 battery's positively charged pole. In other words, the battery generates a moving charge, or electricity. (See How Electricity Works and How Batteries Work for more details).

The exact reaction that generates the electrons varies, depending on the type of 40Y6797 battery. In a lithium-ion battery, you'll find pressurized containers that house a coil of metal and a flammable, lithium-containing liquid. The manufacturing process creates tiny pieces of metal that float in the liquid. Manufacturers can't completely prevent these metal fragments, but good manufacturing techniques limit their size and number. The cells of a lithium-ion Pavilion DV2000 battery also contain separators that keep the anodes and cathodes, or positive and negative poles, from touching each other.

If the Acer Aspire One battery gets hot through use or recharging, the pieces of metal can move around, much like grains of rice in a pot of water. If a piece of metal gets too close to the separator, it can puncture the separator and cause a short circuit. There are a few possible scenarios for what can go wrong in the case of a short circuit:

If it creates a spark, the flammable liquid can ignite, causing a fire.
If it causes the temperature inside the battery to rise rapidly, the A1175 A1185 battery can explode due to the increased pressure.
If it causes the temperature to rise slowly, the battery can melt, and the liquid inside can leak out.
- There are several reasons why- multiple laptop battery models have been recalled in the past few years. People want small, lightweight laptops that they can use for long periods. They also want their laptops to have bright screens and lots of processing power. For these reasons, laptop batteries have to be relatively small, but they also have to hold a lot of energy and last a long time.

Making lithium-ion Inspiron 640m battery that can hold more power for a longer period requires vital components, including the separators, to be small and thin. The reduction in size makes it more likely that the batteries can fail, break, leak or short circuit.

Check out the next page for more information-, including how to determine if the recall affects your laptop.

Lithium-ion rechargeable battery market expansion

According to the Japanese non-governmental investigative bodies Yano Economic Research Institute recently released report shows that in 2008 the global solar cell production soared by 69.5% to 6.505GW, however, because of Spain's high-power companies to buy back solar power and other new energy power generation electricity) policy, the size of , together with the U.S. financial crisis triggered by the aftermath of the global economic downturn is now spreading to the solar cell Dell KD476 market, it estimates the 2009 global solar cell production will be 8.295GW, annual growth rate of only 27.5%, far less in 2008 to nearly 70 % growth rate.

Solar cells on the terms of the types, the 2009 forecast for crystalline silicon solar cell production will grow by 20.0% to 6.715GW (the proportion of total output of solar cells 81.0%), thin-film silicon solar cell production estimate by 40.0% year to 500MW ( 6.0%), CdTe solar cell production estimate by 78.7% year to 900MW (10.8%), CIGS solar dell D5318cell production is also predicted to increase 260.0 percent year to 180MW (2.2%).

Yano said the solar cell market in 2009 despite the impact made by the sluggish economy showed growth rates narrowed, provided that such is only a temporary phenomenon, the follow-up issues with the prevention of global warming continue to simmer, solar cell market is expected to continue to expand. Yano also said that although the follow-up solar cell market is expected to continue to expand, but to enter the solar cell market as vendors continue to increase, in the past continue to successfully expand the market share of large companies will also be into a bitter struggle, in the future solar market from the old " made out of respect as the hybrid (HV) of Sony VGP-BPS9/B , as well as the best-selling electric vehicle (EV) the introduction of lithium-ion rechargeable batteries, more and more attention. expand the use of lithium-ion rechargeable batteries, the pace is accelerating, Executive Chairman of Hitachi, Ltd. Takashi Kawamura president and chief executive, said: "will be for the use of social infrastructure and industrial development of large lithium-ion power batteries." symbolic significance of which is that Hitachi will be within the year 2009 as a wholly-owned subsidiary of Hitachi. Hitachi, Ltd. in the future not only for consumer products and electric vehicles, will be facing the electric power storage and industrial equipment to carry out lithium-ion rechargeable laptop battery business.

Lithium-ion rechargeable battery, as the potential uses, the industry is hybrid and electric vehicles such as electric vehicles, high hopes. But at the moment the automotive industry for reliability and durability concerns, on the use of lithium-ion rechargeable Satellite A65 battery, be cautious, the market takes time to expand.

Under such circumstances, there has been prepared without first for the automotive and the first power-storage market for set-based lithium-ion rechargeable XPS M1210 battery production enterprises. This is the ELIIYPower. As Japan's Keio University, created the risk of the company, the company plans within the year 2009, Kawasaki City, Kanagawa Prefecture set up factories planned in 2010 with an annual output of 200,000 of the scale of production. Will strive to reach an annual output of 1.2 million. Units used cathode material for safety and durability are excellent lithium iron phosphate Aspire 3000 battery.

Despite Japan's economic slump was still in the situation, but for the establishment of production bases and to strengthen the financing of research and development progress very smoothly. Its inception in 2006, only the large and Housing Group, Dai Nippon Printing, and Sharp, and other enterprises funded, but by the end of May 2009 and before that received 7.5 billion yen of new funds for the production bases of iBook G4 battery . Among them, the international oil development Emperor Shi, Mitsuuroko, Yaskawa Electric, Hing Bank Leasing, JAFCO (JAFCO), YokohamaCapital have them the investor. Recently, in July 2009 for the purpose of strengthening research and development, from the Toyota Tsusho, Mitsumi Electric, Mitsui Sumitomo VentureCapital received about 8 billion yen investment, 10.1 billion total registered capital of ¥ 67,220,000. Most of the enterprises planning to funding renewable energy such as solar power used in power-storage uses lithium-ion rechargeable Pavilion DV2000 battery .

Lithium-ion rechargeable battery market expansion

According to the Japanese non-governmental investigative bodies Yano Economic Research Institute recently released report shows that in 2008 the global solar cell production soared by 69.5% to 6.505GW, however, because of Spain's high-power companies to buy back solar power and other new energy power generation electricity) policy, the size of , together with the U.S. financial crisis triggered by the aftermath of the global economic downturn is now spreading to the solar cell Dell KD476 market, it estimates the 2009 global solar cell production will be 8.295GW, annual growth rate of only 27.5%, far less in 2008 to nearly 70 % growth rate.

Solar cells on the terms of the types, the 2009 forecast for crystalline silicon solar cell production will grow by 20.0% to 6.715GW (the proportion of total output of solar cells 81.0%), thin-film silicon solar cell production estimate by 40.0% year to 500MW ( 6.0%), CdTe solar cell production estimate by 78.7% year to 900MW (10.8%), CIGS solar dell D5318cell production is also predicted to increase 260.0 percent year to 180MW (2.2%).

Yano said the solar cell market in 2009 despite the impact made by the sluggish economy showed growth rates narrowed, provided that such is only a temporary phenomenon, the follow-up issues with the prevention of global warming continue to simmer, solar cell market is expected to continue to expand. Yano also said that although the follow-up solar cell market is expected to continue to expand, but to enter the solar cell market as vendors continue to increase, in the past continue to successfully expand the market share of large companies will also be into a bitter struggle, in the future solar market from the old " made out of respect as the hybrid (HV) of Sony VGP-BPS9/B , as well as the best-selling electric vehicle (EV) the introduction of lithium-ion rechargeable batteries, more and more attention. expand the use of lithium-ion rechargeable batteries, the pace is accelerating, Executive Chairman of Hitachi, Ltd. Takashi Kawamura president and chief executive, said: "will be for the use of social infrastructure and industrial development of large lithium-ion power batteries." symbolic significance of which is that Hitachi will be within the year 2009 as a wholly-owned subsidiary of Hitachi. Hitachi, Ltd. in the future not only for consumer products and electric vehicles, will be facing the electric power storage and industrial equipment to carry out lithium-ion rechargeable laptop battery business.

Lithium-ion rechargeable battery, as the potential uses, the industry is hybrid and electric vehicles such as electric vehicles, high hopes. But at the moment the automotive industry for reliability and durability concerns, on the use of lithium-ion rechargeable Satellite A65 battery, be cautious, the market takes time to expand.

Under such circumstances, there has been prepared without first for the automotive and the first power-storage market for set-based lithium-ion rechargeable XPS M1210 battery production enterprises. This is the ELIIYPower. As Japan's Keio University, created the risk of the company, the company plans within the year 2009, Kawasaki City, Kanagawa Prefecture set up factories planned in 2010 with an annual output of 200,000 of the scale of production. Will strive to reach an annual output of 1.2 million. Units used cathode material for safety and durability are excellent lithium iron phosphate Aspire 3000 battery.

Despite Japan's economic slump was still in the situation, but for the establishment of production bases and to strengthen the financing of research and development progress very smoothly. Its inception in 2006, only the large and Housing Group, Dai Nippon Printing, and Sharp, and other enterprises funded, but by the end of May 2009 and before that received 7.5 billion yen of new funds for the production bases of iBook G4 battery . Among them, the international oil development Emperor Shi, Mitsuuroko, Yaskawa Electric, Hing Bank Leasing, JAFCO (JAFCO), YokohamaCapital have them the investor. Recently, in July 2009 for the purpose of strengthening research and development, from the Toyota Tsusho, Mitsumi Electric, Mitsui Sumitomo VentureCapital received about 8 billion yen investment, 10.1 billion total registered capital of ¥ 67,220,000. Most of the enterprises planning to funding renewable energy such as solar power used in power-storage uses lithium-ion rechargeable Pavilion DV2000 battery .

The New hair battery technology

Researchers at the Universties of Miami, Tokyo and Tohoku have discovered a new form of laptop battery. Charged by the application of a very strong magnetic field, the Magnetic Tunnel Junction (MTJ) contains a set of nano-magnets - zones some 5 nanometers across in a zinc-gallium-arsenic-mang nesium matrix - which absorb energy and then release it over time. Although the effect had been predicted, the size and duration of the result was not "We had anticipated the effect, but the device produced a voltage over a hundred times too big and for tens of minutes Apple A1148 , rather than for milliseconds as we had expected," said one of the researchers. "That this was counterintuitive is what lead to our theoretical understanding of what was really going on."

The MJT is the top part of the illustration, and is roughly the same diameter as a human hair compare to Toshiba laptop battery. Beneath that is a magnified image of the central part of the device: the white spots are atoms, and the circles contain the nano-magnets that store the power. Picture: Phan Nam Hai/University of Miami

I've yet to dig out the paper in Nature to find out how far this is from being useful as a power source - as the current device is a few hundred micrometers across with IBM laptop battery, it's not going to be storing megawatts. But it's the sort of thing that could be created in vast arrays, like any semiconductor device, and if they're getting to the bottom of the underlying physics then the same effect could be used in many different configurations of Thinkpad Z60T battery. What may be much more interesting than just power storage is the fact, mentioned almost in passing in the press release, that the current delivered by the MTJ is spin-polarised; the electrons are predominately spinning in one direction.

That's hot news for spintronics, which we've covered previously and which, together with graphene, has the most exciting potential for fundamentally new computational devices. Spin logic could work much faster at much lower power than even today's finest electronics Dell laptop battery, because it doesn't rely on currents flowing and the consequent unavoidable loss.

And, as the researchers say, if this discovery leads to new insights into basic magnetic theory, there are almost no limits to how profoundly it could affect modern life with these Thinkpad R40 battery . Which is a bit over the top - just not that much.

UPS is not the standby battery

All along, UPS is the government procurement an important component of the data center as Laptop battery , whether it is off-line, on-line or a range between the two interactive UPS, its status as a power source has never wavered. However, the performance is perhaps the lack of visibility and intuitive, the data center's "unsung heroes" in government procurement which has not been full recognition of the procurement people, the power is large enough to make even more errors on the application of government procurement UPS products have lost IT equipment, due to the protective effect, while the performance and configuration of the blind application of a variety of problems still plagued the procurement people. But in fact UPS is not the simple standby Sony VGP-BPS9 VGP-BPS9A battery.

With the government data center construction projects have gradually increased, UPS will become a popular product of the government procurement. However, UPS did not able to save the status in the procurement of human hearts for Dell laptop battery, carefully look around the tender document for procurement of UPS products will find a lot of purchases of product performance parameters described in very general terms, but also a lack of UPS application environment and supporting facilities in the Introduction. This undoubtedly indicates that the current UPS products, understanding of people there are still no small misunderstanding, but also for the government IT equipment to run conceals potential problems to protect the Lifebook T4215 battery Lifebook T4210 battery.

The lack of awareness of the UPS

Although the number of data centers along with other types of construction and procurement of IT products has a lot of demand, but whenever the issue of UPS products, many of the people are going to purchase it as a spare "XPS M1210 battery" look.

Center for UPS in the government procurement procurement project, called for procurement of UPS products, power 20KVA, but the measure of IT products of the most important technical indicators, the relevant requirements only power output capacity, rated output voltage, crest factor, rated input voltage of 10 item-based performance parameters, and limited the performance parameters of the procurement people are completely unable to reflect the actual needs of UPS. Yes the ups can power our IT equipmeny when the Pavilon DV8000 battery. Journalists and a number of purchases were carried out on the UPS to communicate product performance and found a lot of procurement people UPS is also understood to remain in the Uninterruptible Power System (uninterruptible power supply system) in this literal sense.

In fact, UPS has already jumped out of a simple function of the uninterruptible power supply functions instead of Pavilon DV9000 battery , the system also shoulder the IT systems more stable and reliable electricity, reduce electricity unusual problems caused by a variety of data anomalies to protect the information system the orderly operation of the function. Can be said that UPS now not just for IT equipment to provide electricity, but also become a high-quality power protection. In government, health care, scientific research, aviation and other fields are often small changes in power supply system, or interference would be a substantial impact on information, the consequences are often disastrous, UPS as the "protection of God" also is self-evident importance.

The news Via batterytalk.

How to choose a charger

Many people when buying rechargeable batteries, a look at the capacity, or look the brand. However, to know that buying a good performance of the rechargeable laptop battery is also a great school of learning.

Batteries can be divided into two categories, one category is "one cell", and the other is "secondary battery." "One cell" As the name suggests is the use of no value once the battery, "secondary dell laptop battery" simply means that rechargeable batteries, can charge for further use.

Lithium batteries can be understood as digital products, special batteries, its shape according to the design of digital products can be arbitrarily changed, lithium batteries almost no memory effect, and use a long time. However, lithium batteries (Sony PCGA-BP71 Sony PCGA-BP1N) are expensive, and between the different specifications of the lithium batteries can not be generic.

In the rechargeable Toshiba PA3451U-1BRS batteries are printed on the surface of a similar mark, indicating this product is what type of battery. NI-MH says that nickel-metal hydride batteries, is actually very simple, NI is the chemical letters Nickel, NH, said hydrogen. By the same token NI-Cd is expressed as a nickel-cadmium batteries.

Battery rated capacity refers to a certain discharge conditions, the Sony VGP-BPS9 battery discharge to the release of electricity cut-off voltage. No. 7 currently on the market capacity of the battery 400mAh-900 mAh mostly between the 5 batteries from 1000 mAh-2500 mAh range. Of course, in a sense, the capacity is of course the bigger the better, because of large capacity means longer battery life.

It is also noteworthy that, among the different capacities of batteries do not mix. For example, three 2300 mAh of the Dell inspiron 1526 battery batteries 1300 mAh battery, which emit an effective current of only 1300 mAh, from the physics can be very simple to understand this point.

The rechargeable Inspiron 640m battery are generally marked on the standard charge time and quick charge time, charging the speed with charger related.

Slow charge generally use constant current charging mode, and the battery is full and automatically converted to trickle charge state. Has the advantage of slow charge circuit design is simple and easy to implement, prices are also lower; As a result of low current constant current charging, effectively reducing the pavilion ZV6000 battery charging process in the heat, to extend the battery life is very good. Drawback is the charging time is too long, especially in the case of large quantity of batteries a bit powerless.

Fast charge is generally using a large pulse current charging Pavilion DV2000 battery , but because of high current battery charging process will generate polarized responses, leading to the rapid increase in battery temperature, full power on after resume a likely explosion and combustion, so fast charge also uses a special chip to control the charging process of Dell Inspiron e1505 Battery, automatically stop charging once filled so that the whole process of charging has become safe and efficient.

In the end is a standard charger or optional fast charger that can be purchased according to the needs of users. Here to remind consumers to purchase brand-name products charger must be, and if I get quick charger fot yoyr Dell Inspiron 6000 Battery,, be sure to understand whether the automatic power-off function.

The article Via batteryblog

How to choose a charger

Many people when buying rechargeable batteries, a look at the capacity, or look the brand. However, to know that buying a good performance of the rechargeable laptop battery is also a great school of learning.

Batteries can be divided into two categories, one category is "one cell", and the other is "secondary battery." "One cell" As the name suggests is the use of no value once the battery, "secondary dell laptop battery" simply means that rechargeable batteries, can charge for further use.

Lithium batteries can be understood as digital products, special batteries, its shape according to the design of digital products can be arbitrarily changed, lithium batteries almost no memory effect, and use a long time. However, lithium batteries (Sony PCGA-BP71 Sony PCGA-BP1N) are expensive, and between the different specifications of the lithium batteries can not be generic.

In the rechargeable Toshiba PA3451U-1BRS batteries are printed on the surface of a similar mark, indicating this product is what type of battery. NI-MH says that nickel-metal hydride batteries, is actually very simple, NI is the chemical letters Nickel, NH, said hydrogen. By the same token NI-Cd is expressed as a nickel-cadmium batteries.

Battery rated capacity refers to a certain discharge conditions, the Sony VGP-BPS9 battery discharge to the release of electricity cut-off voltage. No. 7 currently on the market capacity of the battery 400mAh-900 mAh mostly between the 5 batteries from 1000 mAh-2500 mAh range. Of course, in a sense, the capacity is of course the bigger the better, because of large capacity means longer battery life.

It is also noteworthy that, among the different capacities of batteries do not mix. For example, three 2300 mAh of the Dell inspiron 1526 battery batteries 1300 mAh battery, which emit an effective current of only 1300 mAh, from the physics can be very simple to understand this point.

The rechargeable Inspiron 640m battery are generally marked on the standard charge time and quick charge time, charging the speed with charger related.

Slow charge generally use constant current charging mode, and the battery is full and automatically converted to trickle charge state. Has the advantage of slow charge circuit design is simple and easy to implement, prices are also lower; As a result of low current constant current charging, effectively reducing the pavilion ZV6000 battery charging process in the heat, to extend the battery life is very good. Drawback is the charging time is too long, especially in the case of large quantity of batteries a bit powerless.

Fast charge is generally using a large pulse current charging Pavilion DV2000 battery , but because of high current battery charging process will generate polarized responses, leading to the rapid increase in battery temperature, full power on after resume a likely explosion and combustion, so fast charge also uses a special chip to control the charging process of Dell Inspiron e1505 Battery, automatically stop charging once filled so that the whole process of charging has become safe and efficient.

In the end is a standard charger or optional fast charger that can be purchased according to the needs of users. Here to remind consumers to purchase brand-name products charger must be, and if I get quick charger fot yoyr Dell Inspiron 6000 Battery,, be sure to understand whether the automatic power-off function.

The article Via batteryblog

Lenovo Battery Recall Faq

Q1. Which ThinkPad notebook PC models are affected by the recall?
Customers who bought a ThinkPad or optional or replacement battery between February 2005 and September 2006 may have a Sony laptop battery subject to the recall.

Q2. How can I find out if my battery is being recalled?
Go to www.lenovo.com/batteryprogram to determine if your Thinkpad t60 battery Thinkpad r60 battery is affected by the recall. If you prefer to call a Service Center, a worldwide phone list is also available at www.lenovo.com/batteryprogram.

Q3. If my battery is recalled, how much will the replacement cost?
Lenovo is replacing the recalled batteries free of charge. If you return your recalled laptop battery, your replacement battery will have a one-year warranty.

Q4. Do I have to return my defective battery?
Yes. Lenovo will send a prepaid shipping container to facilitate the return. To ensure customer safety, it is very important that all recalled battery packs be returned.

Q5. If my battery is recalled, how long will I have to wait for it?
Early in the process when demand is heaviest, it could take 3 to 4 weeks to receive a new 40Y6797 battery.

Q6. If my battery has been recalled, may I continue using my system while I'm waiting for my replacement battery? If your battery has been recalled, to continue using your ThinkPad notebook PC safely:
Turn off the system
Remove the Thinkpad X60 battery
Power your system with an AC adapter.
Directions for removing the battery are available at www.lenovo.com/batteryprogram.

Q7. Is it safe to use a third-party battery in my system?
The safety of so-called "gray market" batteries is unknown, and we've had incidents involving these types of batteries. We encourage customers to use only Thinkpad X60S battery from either Lenovo, or authorized resellers, in our products.

Q8. Is it safe to use a ThinkPad on a plane?
We will leave the issue of airline safety to the airlines. If your battery is affected by our recall, whether you are on an airplane or not, Lenovo recommends you remove the 40Y7003 battery and power your ThinkPad notebook with an AC adapter.

Q9. Are these the same batteries recalled by Dell and Apple?
No. Battery packs, which are commonly referred to as "Lenovo 40Y7001 batteries," are composed of battery cells, and while we do use some of the same cells as our competitors, the technology behind the design and manufacture of the larger battery pack is unique to our systems.

How to use and conservation of GPS built-in lithium battery

1. Do not deliberately GPS built-in lithium Laptop battery that will put clean in the charge, when the system prompted a time of low power can be charged, should be put before the injury for the lithium battery is not small.

2. To use the random charging accessories for charging, do not use third-party charger.

3. Most of the built-in lithium-car GPS, so do not be demolished or converted the laptop battery without permission.

4, as far as possible to avoid the body exposed to extremely high or extremely low temperature environment, but also to avoid the erosion of the liquid.

In fact, Car GPS built-in lithium Pavilion DV2000 battery is not your imagination so fragile, so long as a little heart, the conservation and reasonable, built-in lithium battery life can be maintained at three years and change bad habits, we can give built-in lithium battery with the greatest protection, let give full play to their power as a car navigation system to provide a stable life to protect.

At present, the market most of the mainstream car GPS with built-in lithium battery power supply. Lithium-ion Toshiba PA3107U-1BRS PA3451U-1BRShas a discharge stability, small size and other features relative to conventional nickel-metal hydride and nickel cadmium batteries for the obvious advantages. Many portable electronics market, digital products are used in lithium-ion battery power supply.

But lithium-ion Toshiba PA3399U-2BRS battery is not perfect, the use of lithium more stringent environmental requirements, and the high cost of batteries and the discharge current is its relatively small defects can not be ignored. Then, as the use of large lithium-ion batteries: automotive GPS products, the use of lithium batteries that power supply should be careful when there. In daily for VGP-BPS2C battery conservation, and many casual habits could have built-in lithium-vehicle navigation systems cause fatal injuries. So we specialize in power from a vehicle built-in lithium use and conservation aspects of the daily summary of some experiences to share.

Many users use the GPS when the car, regardless of the body are used to power the adequacy of the charging of plug in vehicles to use, such use would cause harm lithium batteries in serious even built-in lithium PA3465U-1BRS PA3465U-1BRS battery can not be used. Plug in Car Charger for GPS because the car after the power supply will be carried out on the built-in lithium rechargeable, if the user habitually used GPS navigation, you are doing each time you use the equivalent of charging and discharging, thereby affecting the battery life. Which affect the capacity of lithium Toshiba PA3384U-1BRS life and a major factor is the need for a battery charge and discharge times, which is why many users feel less and less power-car GPS durable reason.

The right to use is: should wait to run out of electricity, or GPS navigation instrument in itself to give low power to remind the car after the connection charge for charging to use. If your car GPS Car Charger to use the long-term connection, it is best to conduct a full-month charge and discharge, which is run out of Toshiba PA3399U-1BRS power to conduct a full volume of charge, so that the greatest degree of protection can extend the life of lithium batteries.

The user has just purchased for GPS products, its appearance in general only 50% of capacity or less. When you first use the Apple laptop battery in I need to put power to make, and then charging an external battery charger, and charge for the first time the best more than 15 hours, the second and the third meeting such as the battery runs out after use, the charging time is best but also more than 12 hours, but it should be noted that charge no more than 24 hours, otherwise the battery will produce a surplus of energy resulting in the internal decomposition of the electrolyte inside the battery voltage increase caused by natural or explosions.

In addition, for long-term non-use of the GPS, the Li-ion Sony PCGA-BP2NX PCGA-BP71 will automatically discharge the next best to the battery is full before use after use, so as to avoid over-discharge the battery caused damage. The use of GPS in the process, try to avoid exposure to the body or in a humid environment, the use of harsh external environment would cause instability in Li-ion battery discharge.

The article Via battery blog

Lithium battery explosion reason and prevention

According to the U.S. well-known science writer Marshall Brain series of articles in the lithium batteries introduction, the vast majority of lithium battery explosion caused by a short circuit, and the specific reasons, including charging overvoltage / over-current use of aging.

Lithium laptop battery manufacturing process, because the manufacturing process itself flawed, it is easy to be insulated in this between the two poles, leaving metal dust, copper foil, aluminum foil pieces. The angle is expected in the battery than the fever (more common in long-term use or charging), the like boiling water in a grain of rice, as in the electrolyte to make random thermal motion. If you happen to have the Canon BP-511 battery positive and negative particles or debris near the middle of the diaphragm level, it could create a divide perforation, triggering micro-short circuit. As the batteries are flammable organic electrolytes, micro-short-circuit may cause an explosion, burning and other accidents, generally have the following three cases:

1. Sparks ignited the electrolyte, and thus bring disaster to come into contact with plastic body and flammable, resulting in fire;

2. Was experiencing an increase of temperature caused by the battery, the discount laptop battery inside the space is small, perhaps because of increased pressure to explode;

3. Batteries slower rise in temperature, the battery case to melt gradually, so that corrosive electrolyte leakage.

Lithium Dell Inspiron e1505 Battery safety problems can not stop now, because then the advanced manufacturing technology, will inevitably lead to planting the seeds in the electrolyte "missile." Should be noted that the formal sector of lithium battery production and sales have strict norms of acceptable quality lithium batteries, the number and size of debris have been controlled within a small, very low risk of perforation of diaphragm; batteries outside the Shell also used flame-retardant material, is not prone to fire.

The explosion-proof lithium battery of measures

Lithium Dell Inspiron 6000 Battery safety problems, the battery manufacturer, of course well aware, then what they used explosion-proof measures? Li-ion batteries for notebook computers, for example, its working principle is: Lithium batteries near full charge and discharge almost drained when the voltage drop, the control circuit detects this situation, notify the protection circuit cut off power supply to prevent overcharge or excessive discharge, so as not to shorten battery life.

The current notebook lithium batteries possess a more complete multi-level protection mechanism, even in the power charger, notebook computers unusual circumstances, the Dell Inspiron 1300 battery laptop can also be converted to automatic protection status, is generally not an explosion. But once the control circuit and protection circuit of the ability to work reduced hours, the battery on the verge of "dangerous" the. Mobile phones and other electronic products, lithium battery charge and discharge protection mechanisms, similar to this.

Do not need it "at arm's length"

In recent years, lithium-ion electronic products explosions often found newspapers, aroused a lot of consumer panic, some people for their own mobile phones, MP3 charging often "at arm's length"; also because of fear, simply a long-term will be cast aside Dell laptop battery, cause scrap. However, survey results, the majority of lithium battery explosions are the result of the user pay attention to safety tips, such as unauthorized modification, use of non-matching charger, the A1175 A1079 battery placed in extreme environments such as making.

Should be pointed out that the lithium Dell inspiron 9400 battery technology as a kind of after 30 years of study, has successfully commercialized the mature technology, its safety is guaranteed. Regular brands of lithium batteries at the factory will have been numerous Road test procedure after they are sold as well as information feedback mechanism in order to recall the product in question in time.

United States Transportation Security Administration (TSA) is given following the recommendations of the safe use of lithium batteries:

1. Using the original charger: Li-ion battery charging time is the high period of bombing. Than the original VGP-BPS5 VGP-BPS2C battery charger is compatible with the battery charger to ensure better security.

2. Use of a reliable battery: try to buy original Sony laptop battery, not to save money to buy "second-hand goods", such batteries may be through maintenance, and reliable than original batteries.

3. Do not place the Latitude D620 battery extreme environments: high temperature, collisions, etc. are all important causes of battery explosion, as far as possible so that the battery is in a stable environment, away from the high-temperature areas.

4. Do not attempt to modify: the phone is a sophisticated communications equipment, in the design, manufacturers will have on its security, strictly textual research. After modification, the battery may be at not taking into account the environment before, an increase of security risks.

Via Batterytalk.info

Accumulator is no longer pollute the environment

Kinds of new acid-free batteries - lead-oxide laptop batteries through the national authority before testing, all targets were met or exceeded the national standard. This means that 150-year-old battery technology was a revolutionary breakthrough, making the traditional lead-acid batteries polluting industries into a zero-pollution environment-friendly industries possible.

Lead-oxygen battery is the invention of two brothers - West Cong Zhang, Zhang Sai-wen, who under the leadership of Shaanxi and the Green Energy Technology Co., Ltd. After more than six years of research, finally reaction mechanism of electrolyte in the Dell laptop battery research breakthrough and the preparation of a compound salts out of aqueous solution of diluted sulfuric acid aqueous solution instead of the traditional.

Was responsible for this testing is the Ministry of Industry and Information Technology Institute of Chemical Physics Power Product Quality Supervision and Inspection Center, was recognized as authoritative testing organizations within the industry.

According to reports, the submission of the three kinds of laptop batteries are the product under the conditions of industrial production (non-laboratory products). They are the cars to start batteries, electric bicycles and electric vehicles power battery special battery, application fields and market prospect is very broad.

According to experts, currently used batteries generally can be divided into a dry (normal batteries), secondary HP laptop battery (rechargeable batteries, mainly used in mobile phones, computers), lead-acid batteries (mainly used in automobile, electric vehicles) the three class. With regard to the battery pollution, the masses are most concerned about reports the most ordinary Apple laptop battery. In fact, the production process is now common dry batteries without adding cadmium, lead, arsenic and other substances are no longer become a serious source of pollution. On the contrary, a large number of car battery, lead-acid batteries used in electric vehicles because they contain lead and sulfuric acid, but rather rubbish dump, one of the most dangerous items.

It is understood that corrosion of lead-acid battery lead after the spill of heavy metals and acids will not only seriously polluted soil and water, air and the environment, ecological balance can also cause damage, but also trigger the body metabolism, reproductive and neurological aspects of the disease the Dell Inspiron e1505 Batterybattery , the body of lead Once the excessive levels, it will lead to mental decline, but also easy to induce malignant tumors of children, and even lead to death.

Compared with the traditional lead-acid Toshiba PA3399U-2BRS batteries, lead batteries of oxygen greatly reduced pollution of the environment. Of Environmental Science and Engineering, Nankai University, Dean Zhou Xing, said lead-acid batteries of the solid, gaseous pollution can be eliminated, but can not avoid the water-soluble heavy metal ions of lead pollution. Lead-oxygen IBM laptop battery although the production process and lead-acid battery production process the same, but thanks to a salt water solution instead of sulfuric acid and lead ion concentration is very low, almost no emissions, greatly reducing the risk of lead contamination.

In addition, the lead-oxygen Latitude D620 battery for the replacement of sulfuric acid complex salts and additives can make use of iron and steel enterprises discharge waste from a coal-based chemical synthesis to obtain a simple to solve a number of steel companies can not handle the cost of treatment may need to spend a lot of pollution emissions.

Chang brothers have been lead-oxygen Dell Inspiron 1300 battery in three Chinese national patent. The Ministry of Industry and Information Technology Electronic Science and Technology Information Institute points (Science and Technology Novelty Search) shows that the world there is no similar technology.

Zhou Xing believes that the world faces an energy and environmental crisis, the advent of lead-oxygen battery of great significance and far-reaching.

The article Via batteryblog

Get GBP 5.00 Credit Free Now for your laptop battery

Last Friday I have seen some good news for notebook users in the Google, I searched free battery and see a online shop http://www.laptops-battery.co... now offer a coupon for their battery here.

In response our thanks to the customers who given support to our company as always, hereby, we organized a big promotion activity to reward each of our valuable customer.

Below is the activity introduction for your review:

1. If you have a Blog, and you update it from time to time, no matter what’s your blog subject, only except for containing adult content.

2. As long as you place order on our website and write a pertinent review of your shopping experience in our store on your blog, including service attitude, goods quality or price advantage, leave a link of the product you purchased with title (the detail product description of your order item), let me take a example on how to write the link and title, Link: http://www.laptops-battery.co..., Title: ”Sony VGP-BPS2 Battery” or “VGP-BPS2”.

3. The GBP 3.00 refund is based on this blog review article won’t be deleted randomly without anticipated notification.

4. Furthermore, Blog with PR 4 or above will get a chance of GBP 5 refunding.

5. When you have done above process, please email us at info(alt)discount-laptop- battery.co.uk.

Remarks: This activity is available till Dec 25th, 2009.

The Free Credit 5£ most for their Newest laptop battery below :

Acer : BTP-44A3 BTP-42C1 BTP-52EW BTP-59A1 BTP-60A1 BTP-63D1 BTP-73E1 Aspire 1400 battery Aspire 3050 battery Aspire 5000 battery Aspire 5560 battery TavelMate 240 battery TavelMate 380 battery TavelMate 2000 battery TavelMate 3300 battery

Apple : Ibook G4 battery Ibook G4 12 battery Ibook G4 14 battery Apple A1148

Dell : 1G222 1X793 Inspiron 1420 battery Inspiron 2600 battery Inspiron 1521 battery Inspiron 1721 battery Inspiron E1405 battery Latitude D420 battery Latitude D430 battery Latitude D510 battery Latitude D810 battery Latitude D830 battery GK479 EK890 GW240 RN873 PC764 TC030

HP : PB994A PB992A HSTNN-LB31, Pavilion DV2000 battery, Pavilion DV6000 battery, PB995A, PB991A, EVO N400c battery, EVO N410c battery, EVO N410 battery, Evo N600C, Evo N610C battery, Evo N620C battery, Pavilion DV4 battery, Pavilion DV4T battery, Pavilion DV5 battery, pavilion DV5T battery, Presario CQ40 battery CQ45 battery CQ50 battery CQ60 battery CQ70 battery

IBM : Thinkpad R50E battery Thinkpad R50P battery Thinkpad R51 battery Thinkpad R52 battery Thinkpad R60E battery Thinkpad R60I battery Thinkpad R61E battery Thinkpad T43 battery Thinkpad T43P battery 40y6795 40y6797 40y6799 40y6999 40y7001 40y7003 92p1005 92p1011 92p1082 92p1101 92p1102 08k8193 08k8194 08k8195 08k8196 08k8197 08k8198 08k8199

Toshiba : Satellite a100 Satellite a200 Satellite a300 Satellite l200 Satellite l300 pa3176u-1brs pa3191u-1brs pa3191u-1brs pa3191u-3brs pa3284u-1brs pa3285u-2brs pa3285u-3brs pa3356u-1brs pa3356u-2brs pa3356u-3brs pa3395u-1brs pa3421u-1brs pa3420u-1brs pa3450u-1brs pa3506u-1brs pa3475u-1brs pa3476u-1brs pa3534u-1brs pa3535u-1brs pa3682u-1brs pa3536u-1brs pa3537u-1brs pa3479u-1brs pa3480u-1brs

The news via BatteryTalk.

10 **Better** cheap and easy upgrades for your old PC

In response to a submission on digg.com entitled “10 cheap and easy upgrades for your old PC”, user gaqua posted a “better” list in the comments that I found funny enough to want to give it its own post on my meaningless blog.

Here’s a better list.

1 - Clean up your shit, dad. I’m tired of coming over and finding a new toolbar on IE or Firefox every time. I’m tired of thirty icons in the systray, half of which have some bizarre relevance to programs that are no longer installed. Go to add/remove programs, and remove anything you don’t use in your Apple Powerbook G4 battery.

2 - Defrag that shit. 74% fragmented. SERIOUSLY? How is that even possible? I’m scheduling this for every Wednesday night at 10pm dad. I know it’s going to freak you out when it starts doing this all on its own but just leave it alone and let it do its magic.

3 - 512MB of RAM? Do you know how cheap RAM of VGP-BPS2C is? PC2700 DDR1? Oh my God…I think I might throw up. For $50 I can get you to 2GB of RAM. $50.

4 - I’m installing Ad-Aware and Spybot Search & Destroy - your system has over 200 known spyware problems. I’m fixing them. I’m making this Inspiron 6000 Battery bulletproof. Don’t fuck with it anymore. I’m installing AVG anti-virus. It’s going to ask you to update it - UPDATE IT WHEN IT ASKS.

5 - Holy shit I can’t believe this - you’re running XP without even SP1 installed. I’m installing SP3 for D5318 Sony NP-BG1, Dad. It’s a lot more secure. Jesus christ this is like the dark ages of computing.

6 - Oh fucking shit - 3 hours to download? What the fuck - you’re still on that 512k DSL? Mom is paying for Cable! She’s paying for Cable internet, Dad. I’m going to unplug this wire from the DSL modem and plug it into the cable modem of A1175 A1079. Yeah. No it’s very easy. And I’m calling AT&T and canceling DSL. There, I just saved you $50 a month. And yeah, the internet is faster.

7 - Oh look 360tyj.com, you have a cutesy animated desktop background. Yeah, your celeron 1.6 GHz probably doesn’t like that, especially with the 16MB integrated graphics. I’m going to turn that off. I know, I know. But it’s best for everyone.

HOLY SHIT YOUR COMPUTER IS FASTER NOW DAD. Please, tell everyone in the family that you “don’t know what he did but the computer is so much better, you should call him and have him come take a look, I’m sure he’d be happy to Latitude D600 battery!”

There’s nothing I love more than that, dad. I love fixing Uncle Butch’s disgusting laptop with the inexplicably stained keys and I love playing around with the disgusting beige eMachine that Aunt Patsy uses to send all those cool inspirational email forwards with pictures of kittens or penguins or koalas or pandas.

No, I understand. As the oldest and most computer knowledgeable of Latitude D620 battery , it’s my responsibility. Just like Uncle Mason would help us all out if we got into legal trouble right? Well, if he weren’t disbarred for fraud, I mean.