laptop battery

Admit it. Come out of denial. You know your laptop that was supercool 2 years ago now gets 15 minutes of VGP-BPS2A battery life. It sucks and we all share the same problem eventually. Laptop batteries (and many others) will start to lose their total charging capacity after awhile. It’s slow so we usually don’t notice it until years later. But when it happens, you can’t help but go insane. Laptop batteries usually cost a fortune (my 12-inch powerbook VGP-BPS2B battery is like $130). This is why you should take the road less traveled and rebuild your battery.

So what do you have to do? Well it’s not too complicated, you just have to basically replace the individual cells inside of the latitude d620 battery casing. Ever have an R/C car and you had to buy those $20 battery packs at Radio Shack for them? Well if you take a close look, it’s usually just 6 batteries saran-wrapped together with a proprietary plug. Same goes for these laptop batteries.

Now before we go any further, let me issue a warning. Although most of us think we’re invincible, we’re not. This is something that could lead to harm if you don’t follow everything directly. If you’re new to hacking apart electronics and what not, don’t proceed. Have a specialist help you. We’re not responsible for anything that may happen, mkay? Kay.

Allright so let’s get started. Take your fork out of the electrical socket for a moment and check it.
Remove your vgp-bps2 battery from your laptop. Try to get it drained all the way if you can. Look at the label on your battery. Somewhere near the warning where it says ‘Don’t do this, don’t do that’blah blah blah’ you should see a model number for the battery pack. Probably something along the lines of ‘Lithium Ion Battery Pack No.’ Pry off the cover of your vgp-bpl5a battery pack like so.

….which will reveal something like below.

Individual cells.

If you have a powerbook like me, it’ll look like this:

So. Now we’ve got a bunch of cells. Cute. Find the part number for them. As you can see in the pic above the powerbook pavilion dv6000 battery, the number is printed directly on the wrapping. In this case it’s CGP345010. Ok great. What’s that mean? Google it and see. Ahhh! It’s made by Panasonic. Wonderful. Now we have to go get replacements. If there’s 6 cells, you’ll obviously need 6 new ones. Try this website for ordering them.

Get out your xacto knife, wire cutters, etc. for this. You’ll need to carefully remove all the cells. Each battery pack is different so we can’t say how it’ll work out for you. Just be careful and don’t throw away the old ones.

Take out all the l contacts etc. until you have yourself a blank thinkpad t42 battery tray.

Chances are your battery cells will come with wires on there for connecting it to something. No. We don’t want these. We need this to lay in the tray! Remove your black and red wires but keep any others left. It’s usually to keep them from short-circuiting. Next, take any coating and tops off your old batteries and move them carefully onto the new ones. After you’re done, you should have naked old batteries, and new thinkpad x31 battery that look like the old ones.

Next, you need to get contact going. Obviously using l. You can either solder them together properly with a l strip on the front, or just try positioning the l correctly inside the case with the cells. I did the 2nd method and it worked for me after some tinkering around.

Almost there. Put everything back together like it was and make sure you check out your finished product with a multimeter to make sure there’s a current. If all is well, throw it all back together and then into your laptop. Charge it up completely without using it and voila. You my friend, are set.

Much thanks to electronics lab, and reader [surfer] for the tips and pics! In my opinion, the PowerBook laptop battery is much easier, but don’t let that stop you! Just take care!

For more information on laptop battery please refer to www.sunvalleyus.com.Our Laptop Batteries are specifically designed for your laptop models.
click the hot HP laptop battery part no. below:
PCGA-BP1N, PCGA-BP71, PCGA-BP2NX, PCGA-BP4V, PA3107U-1BAS, PA2487UR, PA2487U

Some rechargeable batteries can be restored through external means, such as applying a full discharge. There are, however, many defects that cannot be corrected. These include high internal resistance, elevated self-discharge, electrical short, dry-out, plate corrosion and general chemical breakdown.

The performance loss of a battery occurs naturally as part of usage and aging some is hastened by lack of maintenance, harsh field conditions and poor charging practices. This paper examines the cause of non-correctable battery problems and explores ways to minimize these breakdowns.High Self-discharge
All batteries are affected by self-discharge. This is not a defect per se, although improper use enhances the condition. Self-discharge is asymptotical the highest loss occurs right after charge, and then tapers off.

The percentage of self-discharge can be measured with a battery analyzer but the procedure takes several hours. Elevated internal battery resistance often reflects in higher internal battery resistance, a parameter that can be measured with an impedance meter or the OhmTest program of the Cadex battery analyzers.

Cell matching
Even with modern manufacturing techniques, the cell capacities cannot be accurately predicted, especially with nickel-based cells. As part of manufacturing, each cell is measured and segregated into categories according to their inherent capacity levels. The high capacity ‘A’ cells are commonly sold for special applications at premium prices the mid-range ‘B’ cells are used for commercial and industrial applications and the low-end ‘C’ cells are sold at bargain prices. Cycling will not significantly improve the capacity of the low-end cells. When purchasing rechargeable batteries at a reduced price, the buyer should be prepared to accept lower capacity levels.

lithium-based cells are by nature closely matched when they come off the manufacturing line. Tight tolerances are important because all cells in a pack must reach the full-charge and end-of-discharge voltage thresholds at a unified time. A built-in protection circuit safeguards against cells that do not follow a normal voltage pattern.

Shorted Cells
Manufacturers are often unable to explain why some cells develop high electrical leakage or an electrical short while still relatively new. The suspected culprit is foreign particles that contaminate the cells during manufacturing. Another possible cause is rough spots on the plates that damage the separator. Better manufacturing processes have reduced the ‘infant mortality’ rate significantly.

Applying momentary high-current bursts in an attempt to repair shorted cells offers limited success. The short may temporarily evaporate but the damage to the separator material remains. The repaired cell often exhibits a high self-discharge and the short frequently returns. Replacing a shorted cell in an aging pack is not recommended unless the new cell is matched with the others in terms of voltage and capacity.

Loss of Electrolyte
Although sealed, the cells may lose some electrolyte during their life, especially if venting occurs due to excessive pressure during careless charging. Once venting has occurred, the spring-loaded vent seal on nickel-based cells may never properly close again, resulting in a build-up of white powder around the seal opening. The loss of electrolyte will eventually lower the battery capacity.

If correctly charged, lithium-ion cell should never generate gases and cause venting. But in spite of what is said, the lithium-based cells can build up internal pressure under certain conditions. Some cells include an electrical switch that disconnects the current flow if the cell pressure reaches a critical level. Other cells rupture a membrane to release the gases in a controlled way. lithium-ion-polymer in a pouch cell sometime grows to the shape of a small balloon because these cells do not include venting. Ballooning cell are known to damage the housing of the portable device.

For more information on laptop battery please refer to sunvalleyus.Our Laptop Batteries are specifically designed for your laptop models.
click the hot HP laptop battery part no. below:
PCGA-BP1N, PCGA-BP71, PCGA-BP2NX, PCGA-BP4V, PA3107U-1BAS, PA2487UR, PA2487U