The Li-Ion battery in my laptop has been getting a bit long in the tooth. Rated at a 4.4 AH capacity new, /proc/acpi/battery/BAT0/info told me that it was only holding 1.8 AH now that it was a few years old. (This is normal for Li-Ion batteries, which degrade over time, even without multiple charge-discharge cycles.)

A brand new IBM (or Lenovo now) battery costs over a hundred dollars, but by shopping around I was able to find a “compatible” thinkpad t60 battery for as low as $50. It was only rated at 4.4AH, but that is relatively close to the 2nd generation 4.8AH batteries that IBM/Lenovo sell for twice as much. I started to wonder if it might be cheaper to buy OEM li-ion cells and simply replace the cells (keeping the case, and charge/discharge electronics). The first step would be to determine what type of Li-Ion cells I’d need to buy, so I decided to open up my old battery.

As you can see, the standard Dell xps m1330 battery has six cells, in three parallel groups of 2. Cells are nominally 3.6volts, so this adds up to 3 x 3.6 or 10.8 volts. In the photo I have removed the shrink wrapped packaging from one cell to view the markings. Note the relatively complicated PCB along the back side of the cells that handles charging and discharging. If you zoom into the photo, you can see that the controller PCB is connected to each end of every pair of cells (orange and black wires to the far ends, silver metal tab connections to the middle two). This allows the controller to charge each parallel pair of cells at a different rate. The controller PCB is also connected to a thermocouple that is resting between the two middle cells. This gives the controller a temperature reading on the cells during charging and discharging. If the PCB detects that the temperature is too high, it can lower the charging rate, or shut down the power draw (and laptop). Also note the heat fuse (small white block in series with the power line between the two leftmost cells) that is designed to open the circuit if the charge/discharge controller for some reason fails to maintain a safe temperature. All of these safeguards are designed to keep your xps m1330 battery from igniting, and will be very important to maintain in any “re-manufactured” batteries.

I actually determined what type of li-ion cells were used by measuring them and then looking for li-ion cells of a similar size. They are about 2.5″ high by 11/16″ diameter, or very close to the 64.9mm x 18.3m diameter size of a 18650 style cell that I found on www.batteryspace.com.

My inspiron e1505 battery is rated at 4.4AH, or 4400mAH. As it has three sets of parallel cells, each set of two cells must have a 4400mAH capacity (because they are in series, you add the voltage, not the amperage), so each cell must have a 2200mAH capacity.

From a mAH per dollar standpoint, 2000mAH cells are the best value, but I decided that since the total cost difference was only six dollars, I could afford purchasing the 2200mAH cells. These are slightly lower than the 2400 mAH capacity of the newcells that Ibm/Lenovo now use, and I’ll end up with a 4.4AH battery,sony vgp-bps2c , (just like the original part number, before IBM/Lenovo upgraded it to 4.8AH).

Just the cells cost $34.20, but I chose to purchase them with solder tabs attached (an extra $1.50) because I figure the people at batteryspace.com are better than me at attaching tabs, plus having extra tabs to work with (those that come on the cells, plus those I salvage from the original cells) will make my life easier. (Besides, the $7 of shipping is the largest extra expense….if the 2600mAH cells weren’t almost twice as expensive as the 2200mAH cells I’d have gotten them just get a 5.2AH capacity battery, dell gd761 , kd476!) The total cost was $43.42. A week later my batteries arrived. (Thanks UPS!)

Important safety note!

You should never replace li-ion cells with cells that have a lower capacity rating, or charge/discharge rate rating. The electronics in dell inspiron b120 battery are programmed to prevent the cells from overheating and catching fire, and do a very good job as long as the replacement cells in the battery are of equal or higher rating than the original cells.

Lasting Your sony VGP-BPS2C  VGP-BPS2A Laptop Battery Life?

Correct recharging procedure for your laptop. Only use the power cord that came with your laptop or an authorized replacement battery.

Use your laptop’s power management features. The system will run at lower processor speeds when enabling power management features and it will go into “sleep” mode faster when inactive.

Correct maintenance for your VGP-BPS2C Battery when not in use. Don’t leave it in direct sunlight, areas where it will be exposed to extreme temperatures such as car trunks.

Buy sony VGP-BPS2C Battery with internal processors such as Li-Ion batteries.

If you don’t use your laptop for a period of time, you must fully discharge then recharge the sony battery.

Non Li-Ion batteries must be fully discharged and then recharged every 2-3 weeks.

SONY VGP-BPS2 VGP-BPS2A Battery Specification:

We choose manufacturers who invest a large amount of capital in the R&D and quality enhancement, which ensures the best quality and performance of battery. Most of our batteries are tested manually again after tested by electronic devices,so the defect rate is very low. As for the raw materials, we never sacrifice quality for lower price; we always choose the highest quality when take advantage of lower costs. We value quality as the life of our company: save your huge opportunity costs of using other products, save your delivery costs of returning the defects, save your transaction fee of refunds.

I received your battery yesterday from UPS and noted that the open circuit voltage was 11.2 volts. This is important becauseit tells me that this particular battery is probably “good” but just 100% electrically discharged.

A “good” fully charged battery has an open circuit voltage Hp Pavilion dv2000 battery of about 12.65 to 12.70 volts depending on the manufacture’s design and the intended application.

If a known “good” battery has an open circuit voltage of 11.80 V or lower it is considered to be 100% discharged or like a car’s gas tank, completely empty. A voltage reading of about 10.0 volts would lead me to think the battery has one defective cell and is no longer fit for service and needs to be replaced.

It is not easy to load test a battery that has less than 12.0 V to determine it serviceability so it is necessary to attempt to recharge it. A complicating factor is that unless the battery has at least 11.8 volts the charger will not “see” a complete electrical circuit and will not start to charge the battery no matter the length Pavilion dv2000 battery of time it is hooked up to the battery.

Either the discharged battery has to be jumped with a battery that has a voltage of at least 12.4 volts or higher or a special charger must be used. Even then it might take quite a few minutes for the discharged battery to even start to accept a charge. Then of course it will take a number of hours for the battery to reach 12.6 volts and be considered fully charged.

Now at this point the now fully recharged battery can be tested but, as a further precaution it is best to let this Hp Pavilion dv6000 battery return to a normal room temperature as a “hot” battery will test at a higher capacity and could appear good when in fact it is finished its service life.

So after recharging your battery yesterday afternoon I let it cool down overnight and upon coming to work this morning proceeded to test it. The results were exactly as I suspect when we first talked a few weeks ago and I tried to explain what I thought the problem really was.

I believe that your charger or the charger connections are not working properly. So when you finally receive the new batteryI believe that you are again going to have another “dead” battery situation. In this case, I suggest that you first replace your charger before attempt to charge the new battery.

Bottom line is, in an attempt to assuage a good customer and in order to provide the most sensitive Hp dv6000 battery customer service I did not assert my opinion when we first talked and had you check out the charger.

All in all I need your business and your good will to continue to be successful and hopefully we will hear from you again and quite possibly many of your friends and contacts.

With global economies gripped by recession fears two leading Japanese electronics companies are seeking a merger to combat the decline in demand for consumer electronics. Panasonic and Sanyo, both based in Osaka, are in preliminary talks to have Sanyo join Panasonic as a subsidiary Hp pavilion zv5000 battery and will disclose the details of the proposed merger in December.

The merger would create a consumer electronics giant with combined annual sales of $111.5 billion. Panasonic, the world’s largest makers of plasma televisions, would benefit in several areas with the acquisition of Sanyo with rechargeable laptop batteries and solar cell technology being of greatest importance.

Currently Sanyo is the world’s largest maker of rechargeable batteries that are primarily used to power cell phones and laptop computers. Sanyo also has advanced research and development in the increasingly popular field of solar cell technology. With many companies looking at reusable energy sources to deal with rising fuel costs and finite oil reserves Sanyo presents Panasonic with the opportunity to enter the solar market and compete with other consumer Hp F4809A,electronic manufacturers in South Korea and China.

Sanyo is the world’s 7th largest manufacturer of solar cells with a 4.4% global market share. With a larger capital investment from Panasonic analysts say Sanyo could become the leader in solar cell technology. Sanyo also maintains a 40% global market share of lithium-ion batteries and combined with Panasonic the two would control nearly half the world market.

Panasonic is also interested in Sanyo’s lithium-ion batteries for automobiles that could be used with Panasonic’s leading fuel cell technology in the pursuit of eco-friendly car engines. Car manufacturing is another industry in dire economic straits and the combined technology of Panasonic and Sanyo could be a key factor in winning the the race to produce clean, environmentally safe automobiles.

Both companies say the recent downturn in the consumer electronics industry as a result of a worsening global recession has forced Hp F4809A battery each to consider new options for staying competitive.

The Dell laptop battery recall was announced on 15 August 2006. Dell recalled 4.1 million of its notebook laptop batteries in response to concerns that the batteries were overheating and catching on fire.But don’t worried , you can buy hgih quality battery, such as: dell inspiron 6400 battery,inspiron e1505 battery,inspiron 1501 battery .

The Dell-branded lithium ion laptop batteries were manufactured by Sony and were used in Latitude, Inspiron and Dell Precision models manufactured between April 2004 and 18 July 2006. The recall represented nearly 20% of the 22 million Dell notebooks sold during that time period.

Just prior to the Dell laptop battery recall, the computer manufacturer confirmed it was investigating an incident where one of its laptops burst into flames at a conference in Japan. Videos and pictures of laptops exploding into flames were posted on the web.

Although the risk of the Sony-manufactured batteries bursting into flames was small,Dell gd761 ,dell kd476 ,dell td347 are better laptop battery, it could occur when microscopic metal particles in the cells would short circuit and fail to power off, resulting in the battery overheating and potentially bursting into flames.

The laptop batteries were seen as a fire risk. If a laptop had caught on fire on a flight it could have been particularly serious.

The recall was also damaging to businesses whose employees are dependent on laptop computers to do their jobs.

The Sony-manufactured lithium ion batteries were used by many notebook computer manufacturers, such as Apple, Dell, Lenova, Fujitsu and Toshiba, who were all forced to recall laptops.

Although Dell had to recall the largest number of computers, Sony had to recall almost 10 million laptop batteries and had to bear the brunt of the cost. Sony’s profits nosedived towards the last quarter of last year and it was forced to set aside £200m to deal with the recall, which will impact future profits.

Earlier this year, a class action lawsuit was launched against Dell by Thad Griffin, an Ontario resident on behalf of Dell battery users. The lawsuit claims that Dell should have reacted more quickly to the problem and stopped selling the machines earlier. It also alleges that the Inspirons have a design defect making them susceptible to overheating that can cause extra wear and tear to the motherboard.

As is customary in recent years, HP has launched a special edition designed by one of their laptops. This is the new HP Pavilion dv4-1199 Mysterious Waves, which has a blue casing and covered by curved lines, rather attractive black casing of the original model, introduced last year along with the HP Pavilion dv5 and dv7(with high quality pavilion dv5 battery and pavilion dv7 battery).

14.1 inch display (1280 x 800 pixels) and 2.35 kg, is one of those teams that, in terms of portability, fall halfway between the classic 15-inch laptop models and microlights from 12 or 13 inches (such as HP dv2 and dv3 presented at the 2009 CES). With dimensions 334 x 240 x 34 mm (40 mm at its thickest part), carries in its interior one of the new Centrino 2 processors, including an Intel Core 2 Duo P8400 at 2.26 GHz,9 cells li-ion pavilion dv4 battery .

Except the new outer casing, whose finish was inspired by the waves of a rough sea (hence the nickname “Mysterious Waves”), the rest of its design is virtually identical to the original HP dv4, with an interior in which the predominant shades of gray. Continuing with their equipment, this special edition comes with 320 GB hard drive (SATA at 5400 rpm) and 4 GB of RAM (still the standard DDR2 800 MHz).

Take a reader Blu-ray, which of course also serves to read and record DVDs. Moving graphics and videos, has an Nvidia GeForce 9200M GS card, well equipped with 512 MB memory exclusively. At the sound, integrated Altec Lansing speakers signed, as is customary in the Pavilion family, longer hp dv4 battery life .If you prefer a larger screen, can use its HDMI output to the TV lounge Slim, or VGA output for computer monitors.

Continuing with the connections, we find the usual Ethernet port, a memory card reader 5 in 1 (SD, MMC, MS, MS Pro and xD), three USB ports, an ExpressCard slot, one eSATA port, two audio outputs for headphones and speakers and a microphone input (although it has a microphone, convenient way to take advantage of the webcam frame of video programs in VoIP such as Skype).

To work without wires, connections are Wi-Fi and Bluetooth. In addition to these two guests who could not miss, is also an infrared port, the HP dv4-1199 Mysterious Waves carries a remote control. It comes with a hp laptop battery of six cells, and the battery can fit for presario cq40 battery , presario cq50 battery ,cq 60 battery … although HP has not provided guidance on data the usual hours of autonomy they can achieve.

Its price is 1,200 euros. Above what the average user typically invest in a portable (and more current times), although it presents a fairly complete equipment.