[ltp] bomb batteries

Laurent Gilson linux-thinkpad@linux-thinkpad.org
Sat, 23 Sep 2006 12:00:15 +0200


Hello,

>> Given the amount of cars on the roads, and the number of traffic deaths,
>> does it mean that you should not cross the streets anymore?
>
> But when I cross the road (specially when I drive :-) ) I am conscious
> that maybe I will die. When I leave the computer plugged and I go to
> supermarket I am not conscious that maybe will explode and I will fire
> the house :-) . I would like to know the probabilities, if it happends
> often, etc.

These things happen if you mistreat any LiIon battery for a long time. It
happens faster for Sonys, but it will happen for other brands as well.

Basic rules:
- do not use the battery while itīs hot (>45°C).
- do not charge it with more amp/watt then the original powersupply was
rated. Charging very quickly is very bad (the "1C rule").
- do not discharge it too fast (read: do not overclock and run everything
at 100% load (CPU/GPU, Display brightness) and use USB Power connector at
same time. USB Power connector is the plug above/under the normal USB found
on some models) (a variation of the "1C rule").

1C rule: a LiIon with X Ah capacity should never ever have to  
produce/receive
more then X Amp. If you want to play save make it 0.5C: X Ah capacity =>  
0.5*X Amp

cu