is there a way to bring a half dead battery back to life...

[gehx]

I just got a T22 off of ebay and the battery only keeps about a 10 minute charge. I'm wondering if there's a trick I can use to bring it back to life. I understand that if a battery is dead it's dead, but I'm just wondering if there's a way to bring back some of the charge so I can use it w/o the AC adapter for longer that 5 minutes.

[Kyocera]

Search, there was a topic posted a while back, I think in this forum about removing and replacing the cells, it was quite labor intensive and probably would barely be less than getting a newer/refurbed one or something. It was an interesting procedure.

[ambientscape]

I just got a T22 off of ebay and the battery only keeps about a 10 minute charge. I'm wondering if there's a trick I can use to bring it back to life. I understand that if a battery is dead it's dead, but I'm just wondering if there's a way to bring back some of the charge so I can use it w/o the AC adapter for longer that 5 minutes.

Try reconditioning by discharging it less than 3% and charged over night without turning on the computer. You follow this link to get some useful info : www.batteryuniversity.com

[dsigma6]

Try reconditioning by discharging it less than 3% and charged over night without turning on the computer

On the contrary, my experience has shown that fully discharging while it is on, and then leaving it on to charge has proved more effective.

[ambientscape]

Try reconditioning by discharging it less than 3% and charged over night without turning on the computer

On the contrary, my experience has shown that fully discharging while it is on, and then leaving it on to charge has proved more effective.

What's the difference between leaving it on or off while charging? I just follow the battery maintenance tips given by IBM...

[WRB]

The slow discharging trick really only helps to calibrate the internal electronics of the battery so that it reports the correct numbers to windows.

Unfortunately, it will usually not 'bring back' much life to a battery. The battery's electronics will become 'out of sync' over time due to a number of factors.

If your battery is lasting only 10 minutes, I would guess that the cells inside are old and exhibiting a rapid voltage drop due to a spike in current draw. If this drop is below a certain threshold the electronics signal tol the computer that the battery is low.

Doing a 'slow discharge' (i.e. inactive windows desktop) could allow your battery to run about 40minutes, but as soon as you turn on a cpu intensive program, the rapid drop will reoccur, and you run the risk that the computer simply shuts down.

The actual capacity of modern Li-ion batteries will decline with time. Usually the half-life is ~2 years.

Resyncing the electronics with the amount of charge the battery is capable of holding will not help the physical amount of charge the battery can hold, so i say buy a new one but make sure it has NEW CELLS!

[skygodtj]

I just finished going thru the pages at the Battery University, http://www.batteryuniversity.com. Very interesting reading, and it busted some of the myths I had grown up with concerning battery chemistry. Particularly interesting is the Li-Ion page, http://www.batteryuniversity.com/parttwo-34.htm which sheds light on care of laptop batteries... I'm now re-educated on the care and feeding of my laptop power sources..

teege