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Frequently Asked Questions for DELL battery

November 13th, 2009

Frequently Asked Questions for DELL battery

  • Q1:For the first time the use of batteries, the first three to be recharged for 12 hours?

This is totally unnecessary. Because of the laptop have improved power management circuitry and charging management system, when the battery (such as DELL insprion 1721 battery)reached saturation, the control circuit will automatically switch to the circuit state, so long as full on-line, and not to say that the longer you charge the longer you can use.

  • Q2:In order to prevent memory effect, we should run out before battery charges ?

Each charge before the pairs of battery discharge is not necessary, but also harmful. Because it has proven: DELL insprion 1721 battery depth of discharge will be unnecessary to shorten battery life, it is recommended to use about 10% that the battery can be charged . Of course, when the battery power is still more than 30% of the time advisable not to charge, because the memory effect does exist.

  • Q3: insert the AC when the battery should win, so as to prevent the repeated charge-discharge do?

My suggestion is: No! Of course, you can take the natural discharge lithium-ion batteries to refute me, saying that the natural discharge the battery after the power supply access will appear if there is repeated charge and discharge, and reduce the battery life. And I give you the answer for several reasons:
1. Now laptops are designed to power control circuit of this feature: that when the battery reached 90% (such as most DELL models) or 95% would charge, but to achieve this through natural discharge capacity of one time for 2 weeks or a month, when the battery idle for about a month to fully charge and discharge in order to maintain the battery capacity, this time that you should be concerned about is the battery should be exercising their body rather than being idle again after the recharge.
2. Even if the battery like DELL insprion 1721 battery has “unfortunately” been re-charged, bringing the loss, which don’t cause much greater than it’s a long time not to drop the battery power.
3. Your data are so much more valuable than you laptop or even your laptop batteries that a sudden power failure will not only have damage to your laptop and can not restore the data,and it is too late to regret.

  • Q4: long-term preservation needs of the battery is fully charged do?

Read the following table is clear: (percentage of saturation at the time the relative percentage of the initial value)

Storage temperature
 40% of the charge state 100% of the charge state
0 degree 98% (one year later) 94% (one year later)
25 degrees 96% (one year later) 80% (one year later)
40 degrees 85% (one year later) 65% (one year later)
60 degrees 75% (one year later) 60% (3 months later)

Obviously, if you want long-term preservation batteries, as far as possible on the dry and low temperature environment and allow the battery remaining capacity in 40% of the best. Of course, the best to take the battery out every month to use them once, not lonly to ensure the battery (as KD476,C1295,INSPIRON 2650 Battery,DELL insprion 1721 battery etc.) a good state of preservation, but also to alienate the loss of damage to the battery power completely.

  • Q5: how to use the notebook as far as possible to extend the use of time?

1. The screen brightness to reduce. However, power-hungry LCD screen brightness can effectively be extended to reduce the use of time.
2. Open SpeedStep and PowerPlay power-saving features such as. Now the laptop processors and graphics chips have lower operating frequency and voltage to extend the use of time functions, open the appropriate option can significantly extend battery life.
3. The use of hard drives and CD-ROM of the spin-down software: such as NERO DriveSpeed, PowerBooster can reduce software such as CD-ROM, hard drive speed, etc. can also be effective in reducing notebook power consumption.
4. Make good use of standby, sleep and other functions. As a long time without a computer, allowing notebook standby or hibernate, saving electricity extended the life of the computer.

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The Latest News about Battery

November 13th, 2009

The Latest News about Battery

Today, all things are moved forward, laptop battery is no exception. As had been walking in the era of cutting-edge technologies, it is in robust steps into the future.For good tap business opportunities in the manufacturers, it became a matter of course their persistent pursuit.Electronic manufacturers should consider what truly is the heart of most of their portable devices – the Dell inspiron 1721 battery. The size, shape, weight, and function are all directly related to the battery that will power them. The battery also provides an essential backup on printed circuits and computer systems. It seems that just about every six months a new battery technology emerges using much more exotic and expensive materials. Think about what the cell phone has become as a direct result of the size and capacity of the batteries powering them. Each successive improvement makes batteries smaller, able to hold a charge longer, and able to charge faster. This article takes a look at some of the new battery technologies and how they will improve the electronics industry.

  • Latest Developments

Sanyo introduced the new “eneloop” battery, which is a rechargeable NiMH battery useable right off the shelf. Unlike previous rechargeable batteries, which have limited shelf life because of their rapid discharge, these batteries retain 85% of their charge even after one year. Because this pa3465u-1brs can be used for thousands of charges and is easily recycled, it is much more convenient, cost-effective, and eco-friendly than the traditional single-use batteries.

Toshiba Corporation has announced a breakthrough in lithium-ion batteries that makes long recharge times a thing of the past. The company’s new battery can recharge 80% of a battery’s energy capacity in close to one minute, approximately 60 times faster than the typical lithium-ion batteries in wide use today. The PA3356U-1BRS also has a long life cycle, losing only 1% of capacity after 1,000 cycles of discharging and recharging, and can operate at very low temperatures.

Techtronic Industries Co. Ltd. of Hong Kong developed the V28?. This 28-volt battery delivers increased power and up to twice the run time of traditional 18-volt models, yet the battery weighs slightly less. This means the introduction of new tools like the world’s first cordless band saw powerful enough for every day professional use. Containing no cadmium, the lithium ion Sony pcga bp71 has built-in fuel gauge that tells users how much run time is available. In addition, this battery is equipped with built-in Performance Optimizing Circuit to provide consistent, fade-free power throughout discharge cycle to ensure job power consistency.

Panasonic Batteries has its new Digital Xtreme Power batteries with oxyride technology, designed to last twice as long as regular alkaline batteries, according to the company. They utilize a combination of newly developed materials for the cathode (plus side): Oxy Nickel Hydroxide and new technologically developed manganese dioxide and graphite. According to Panasonic, that means the batteries will yield three times as many snapshots with a digital camera, with a shorter flash recovery time.

  • Trends

Battery Council International recently completed part of an ongoing project to determine the trends of battery development (among other things as evo n600c battery) and how manufacturers will adapt. There are a few interesting items to note from their research:

  1. The North American volume will continue to decline due to longer life batteries.
  2. Auto accessories will increase battery power needs.
  3. Government regulations and restrictions will become more stringent.Lead-acid batteries will lose share in the car industry due to increased use of Lithium and Nickel batteries
    Market demand for rechargeable batteries will increase .

Various forms of lithium batteries are emerging on the market. Although there are concerns about their flammability, many manufacturers are pushing industry standards by pre-qualifying these battery makers. The reason for this trend is simple – lithium is the lightest metal, which results in a high specific charge. For example, it takes 3.85g of lead to produce 1 amp for 1 hour while it only takes 0.26 grams of lithium to produce the same. One type of lithium Dell inspiron 1721 battery is only 2.5mm. Lithium also produces a higher voltage and therefore, a higher energy density. Lithium is also more eco-friendly than lead or cadmium. These characteristics seem to fit right in line with market trends and many electronics manufacturers have noticed.

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Electric battery development and application

October 10th, 2009

Electric vehicles as a pollution-free green cars, will become an important means of transport . Lenovo laptop battery The development of high-performance electric vehicle the world has become the focus of scientific research. Electric vehicles as the core – the merits of the performance of the battery(Thinkpad T60 battery , Thinkpad T400 battery ,Thinkpad T61 battery , Thinkpad X60S battery ), which greatly determines the nature of electric vehicle technology. Batteries currently in use are four factors that severely restricts the development of electric vehicles:

(1) with small power consumption, mileage driving charge short follow-up.dell laptop battery, A rechargeable electric vehicle is currently traveling the longest distance for about 380km;

(2) charging time long it takes to charge 4 ~ 8h, very inconvenient to use;

(3) units in charge of the quality of the equipment is too small, so that the quality of electric vehicles equipped with its own major. Thus speed up the performance and the largest increase in speed can not match with the fuel car;

(4) short life. Ordinary rechargeable batteries, discharge the number of only 300 to 400 times better performance even if the battery is charging and discharging of the number of 700 ~ 900 times, however. Annual calculation of 200 charge-discharge, Dell Latitude C600 Battery,a battery(Thinkpad T60 battery ,Thinkpad X61S battery ,Thinkpad T400 battery ) life of only 4 years, with life expectancy compared to fuel cars is too short. And, the price of battery electric vehicles that the prices of almost about 100 U.S. dollars / kwh, some as high as 350 U.S. dollars / kwh, the cost is too high, users unbearable. Therefore, it was asserted that: “First of all, the success or failure of electric vehicles depends on the battery technology.” As a power source for electric vehicles around the world have made great efforts in research on new types of batteries. Next, various types of electric vehicle battery development and application of performance and described the situation. 

Many different types of batteries, lead acid batteries due to the resistance of small, voltage stability, combined with simple structure, low cost, so in the car that are widely used. The main drawback of lead-acid batteries are low energy, so the weight of large and often charge a shorter life. 

Principle and structure

Lead-acid batteries is the use of leaching in sulfuric acid solution of the two stereotype (plate),aspire 3000 battery , aspire 3030 battery, sub-plate positive plate, negative plate, when the access between the two plates is caused by a chemical reaction DC. Rechargeable batteries, discharge process is very dependent on the material and on-board activity of sulfuric acid electrolyte to achieve the chemical reaction.Cathode active material is on the board of pbO2, was dark brown; negative plate active material is a sponge-like pure lead (pb), was a gray green. H2SO4 aqueous solution as electrolyte. Battery charge and discharge in the process of chemical reaction is reversible.

Normally the battery is discharged by a chemical reaction into electrical energy; when to discharge after the battery(GD761 , KD476) has finished charging, input power, the electrical energy into chemical energy to store. Its charge, the discharge was as follows:

Rechargeable battery in the discharge process, its internal active substance combination and decomposition is in contradiction campaign. Omitted from the middle of a chemical reaction, this process can be expressed as:

The structure of lead-acid batteries by 4 components: (1)-resistant rubber with hard plastic or pressed into the shell of the battery; (2) plate (cathode plate for pbO2, negative electrode plate for lead); (3) is inserted , between the anode plate of wood or plastic partition; (4) by the pure mixture of sulfuric acid and distilled water solution. 

performance lead-acid batteries and its application

The only economical and practical than the energy of lead-acid batteries(Thinkpad T60 battery) for the 35 ~ 40wh/kg, much petrol is much lower than can 11kwh/kg. According to the trial in Japan that lead-acid batteries in the same system for more than 70,60,50,48,38 wh / kg, the life cycle of the corresponding times for 100,200,500,1000 and 2000. U.S. Ⅲ-type “impact” brand electric cars used lead-acid batteries, which can be set at more than 35wh/kg, is taken into account the battery life. Such as is bound to increase than to shorten the life cycle. But “the impact of” quality of car battery 480kg, a charge continued driving in the city 112km (85% depth of discharge). Traveling on the highway could be 144km. Is 480kg make the ordinary gasoline car fuel (fuel consumption 0.07kg/km) traveling 6800km, is “impact” of the car continued traveling 47 times the mileage. As early as 1989, France began the trial of light electric vehicles, of which 15 and PSA Peugeot Citroen C15 models, such as used lead-acid batteries, electric vehicle was developed to use nickel-cadmium battery; the United States vans Ford Ranger lead acid batteries,lenovo laptop Battery, a rechargeable continued driving distance 80 ~ 130km, 1998 was started by the nickel-metal hydride battery is replaced; GM EV1 car of the use of lead-acid batteries, a charge driving distance 112km, but since up to 533kg. German island of Ruegen trial of electric vehicles believe that the lead-acid batteries for electric vehicles in the future the prospect of no use. At that time, the battery is driving the use of Ni-Cd battery (23), sodium nickel chloride batteries (23), sodium sulfur batteries (12), only lead-acid batteries for electric vehicles in the two trials as a contrast. The prevailing question is: by using less than the capacity of lead-acid batteries, a mileage charge be difficult to meet practical requirements.故欲development of electric vehicles to replace the fuel cars,Lenovo C100 battery , Lenovo C200 battery , the key technology is the need to develop high-performance, high efficiency, a new type of battery. 

zinc – air battery

Zinc – Air battery energy up to 150 ~ 400wh/kg. Positive plate set by the metal mesh electrical appliances, such as active layer composed of thin air electrode; anode plate is a pure zinc, potassium hydroxide aqueous solution as electrolyte. Discharge, the cathode plate for the reaction: O2 +2 H2O +4 e → 4OH-, zinc plate for the oxidation process: Zn +2 OH-→ ZnO + H2O +2 e; charging reverse the process carried out in accordance with the above-mentioned. The overall response of the battery(Thinkpad T40 battery,Thinkpad R50 battery)

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Dell business laptop gets wireless battery

October 6th, 2009

Dell introduced the Latitude Z business laptop, which includes a new wireless charging technology that could eventually find its way into other Dell systems, the company said on Tuesday.

The Latitude Z can be placed on a special stand that generates an electromagnetic field to recharge laptop batteries wirelessly. The technology, which Dell calls inductive charging, takes the same amount of time to recharge laptop batteries as an AC adapter, said Steve Belt, vice president of business client engineering at Dell.

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“There’s a coil in the bottom of the notebook and then there’s a matching coil in the stand. You set them next to each other and it generates a current that flows and charges the battery,” Belt said.

This is the first time Dell has included wireless recharging in its laptops. The recharging stand must be purchased separately, however, as an optional extra. The technology could help reduce the dependency on power adapters traditionally used to recharge laptops.Dell xps m1330 battery,xps m1210 battery.

Dell is also adding new hardware that will allow the laptop to boot quickly while giving it “always-on” capabilities similar to those in a smartphone. The laptop includes an Arm processor — a type of chip more often found in smartphones — to boot a laptop quickly for fast access to commonly used Web applications like e-mail and a Web browser. The processor is included alongside an Intel processor, which is used to run the Windows OS.

The laptop is a vehicle to demonstrate some of the latest mobility features Dell could ultimately put in more of its business laptops, Belt said. Inclusion of some of those features in further laptops will depend on how the market responds to the technologies, Belt said.

Wireless charging is already being used in some consumer electronics like mobile phones. For example, Palm sells a kit to recharge its Palm Pre smartphone using inductive charging,inspiron 1705 battery,gd761. also known as inductive coupling. Similar technology is being used to recharge electronic toothbrushes and even power tools.

The quick-boot environment, called Latitude On, boots the laptop in a few seconds, after which users have access to applications include e-mail, contacts, calendar and the Web. Based on a lightweight version of Linux, the environment reduces the need to fully boot into Windows to run certain applications.

Dell adopted the Arm chip for the quick-boot environment as it morphs the laptop into a smartphone-like device, Belt said.

“Because it doesn’t run Intel and it doesn’t run [Windows], it get gobs of battery life,vgp-bps2c,vgp-bps5a battery. It’s like taking a big battery and strapping it to my Blackberry.” Belt said. The quick-boot battery life could range from 12 hours up to two days if the laptop is often in sleep mode, Belt said.

The laptop can also connect to an optional wireless dock via ultrawideband technology, allowing users to move around the room with the laptop without being tethered by wires. The dock, in turn, connects to peripherals using wires. It has a DVI (digital visual interface) port to connect to a monitor, and USB ports to connect to peripherals like keyboards, printers and mice.

The Latitude Z has a 16-inch screen, weighs 4.5 pounds (2 kilograms) and measures one inch at its thinnest point. It runs on Intel’s Core 2 Duo low-voltage dual-core chips at speeds of 1.4GHz to 1.6GHz. The laptop supports up to 4GB of RAM and 512GB of storage through two solid-state drives. Dell offers multiple wireless options including Wi-Fi 802.11 a/g/n and mobile broadband connectivity through 3G or WiMax networks.

The laptop starts at $1,999 and is available in the U.S., Canada, and certain countries in Europe and Asia, Dell said.

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Laptop battery life benchmarks are out of juice

September 21st, 2009

It’s also long been one of the least useful, critics charge, due to the industry’s deceptive use of the dominant standard, the MobileMark benchmark created by the Business Applications Performance Corp. (BAPCo), an industry consortium whose members include Intel Corp., Dell Inc., Hewlett-Packard Co., Advanced Micro Devices Inc. and others.

“Everyone in the industry knows this benchmark is wildly optimistic and that the actual laptop battery life you’ll get is often less than half what MobileMark suggests,” wrote analyst Rob Enderle last month. “This is because MobileMark measures battery life much like you might measure gas mileage if you started the car, put it in neutral, and coasted down a long hill.”

The latest MobileMark 2007 report measures laptop battery life(presario r3000 battery,346970-001) under three scenarios: reading a document, watching a DVD movie, and doing a “representative” mix of productivity tasks, such as reading and composing documents, editing photos and encoding Flash videos (see page 13 of white paper).

But rather than using an average time based on all three measures, BAPCo designates its third scenario as the way most people use their laptop.

There are several problems with this, according to critics. First, doubters such as AMD say that the productivity test assumes that the notebook is idle 90% or more of the time.

Second, MobileMark’s “productivity” scenario assumes that users, when active, are using only software such as Adobe Photoshop or Microsoft Office. They don’t test usage of music or video applications such as iTunes or Windows Media Player, games or Web browsing. The test also assumes that Wi-Fi is turned off.

That seems particularly unjustified today, since netbooks are touted as on-the-go, Web-centric devices, or high-definition video-capable machines.

Finally, MobileMark 2007 allows PC vendors to set their laptop screen brightness at the lowest possible setting, provided it is no lower than 60 nits (a nit is a measure of brightness. The problem, again pointed out by AMD, is that 60 nits is quite dim, being only about one-fifth of most notebook PCs’ maximum screen brightness.

According to an informal reader poll at Neowin.net, a Windows community site, fewer than 15% of respondents run their notebooks that dim.

BAPCo defended its MobileMark benchmarks. “The content of BAPCo benchmarks are vigorously debated and cooperatively developed by BAPCo members according to a long and rigorous process,” the company said in an e-mailed statement. “As is the case with all BAPCo benchmarks, MobileMark 2007 was approved by BAPCo according to a democratic voting process similar to ones used by most industry work groups.”

Despite the criticism, many vendors are willing to tout the sony vgp-bps9 battery life from the Productivity test as their overall MobileMark score. See these offers from Hewlett-Packard Co., Lenovo Group Ltd., and Dell Inc.

Only Acer Inc. (download PDF here) identified its MobileMark time as a productivity score. Asus Inc., Apple Inc. and Toshiba Corp. didn’t mention MobileMark on their Web sites.

In late June, a class-action lawsuit was filed in U.S. District Court in San Jose, targeting Intel Corp. for, according to the San Jose Mercury News, “essentially rigging those tests to inflate the vgp-bps2c battery life of laptops powered by its chips.”

Intel denied the claims, and noted that the same law firm, Girard Gibbs of San Francisco, unsuccessfully filed a separate class-action lawsuit against Intel several years earlier, according to the Mercury News.

Intel also disputes the claim that the public is being misled. “Anyone who criticizes consumers’ intelligence when shopping for laptops is underestimating the consumers,” an Intel spokesman told the Mercury News.

Carol Hess-Nickels, director of marketing for business notebooks at HP, took the same line. “I’d say we are pretty pleased with the benchmarks used today,” she said in an interview last month several days before the lawsuit was filed. “I’ve not personally gotten complaints.”

HP claims business netbooks such as the Mini 2140 and the Mini 5101 can run up to eight hours, or a full business day, on an optional, extended battery.

Lenovo, which has claimed as long as 7.5 hours of powerbook g4 battery life for its laptops on extended batteries, acknowledges there is a problem, however.

“We don’t really like the fact that something is supposed to get four hours and users routinely say, ‘We divide that number by two and that’s what we get,’” said Lenovo segment marketing manager David Critchley in an interview, also several days before the lawsuit’s filing.

Dell appears to agree with Lenovo. “Customers expect the advertised inspiron e1505 battery life to reflect the way they really use the product,” Ketan Pandya, head of AMD-based products at Dell, told Newsweek last month.

As a counterbalance, some magazine reviewers go overboard to turn off all of a laptop’s power-saving features, Critchley said, which is equally inaccurate. “We put a lot of time and effort into our power manager,” he said. “You’ll see some significant gains from the way we handle sub-components.”

AMD, which complained that MobileMark essentially discriminates against its chipsets because they are more graphically powerful than Intel’s, is all for reforming MobileMark.

In a blog entitled “There has to be a better way,” AMD suggests turning the widely used performance benchmark, 3DMark06, into “an active battery life test” that it argues would be a more accurate measure of average dell gd761,kd476 battery life.

Lenovo, although game, is more cautious. “If Dell, HP and Apple all said, ‘Yea, verily,’ Lenovo would be right there with them,” Critchley said.

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