[Thinkpad] Battery Use

[Uwe Walter]

On Fr, 2004-03-05 at 14:13, Colgrove, George wrote:
> requirements from IBM, to "recondition" a battery, I would use the battery
> all the way to "empty".

Bad for Li-Ions.


> 3.	Charge down the battery once a month as IBM suggests to recondition
> the battery.

As rarely as possible. Once a month should be all right, mostly needed
to calibrate the internal "battery fuel gauge".


> 4.	Let the battery cool.

And keep it cool. Temperature is your enemy.


> If there is something I'm missing, please discuss.

Yup, one important thing:

Only load the battery fully, if you plan to use it (allright, this is
sometimes not possible).

At other times, load it to 40% and store it away from the laptop.
See figure one of the first link below, it is really scary (20% vs. 4%
capacity loss in one year).


We've had the following links many times on the list:
http://www.batteryuniversity.com/parttwo-34.htm
http://www.buchmann.ca/Chap10-page6.asp


Greetings, UW(e)