Guillaume Florey wrote:
Hi all,
I have one question about the behaviour of the battery on my powerbook G4:
When the battery is full, and the electricity cable is still plug-in, does
this damage the battery ? I heard that when the battery full is, you have to
unplug the cable and wait before plug-in, till the battery empty is. I wanted
to know if I can leave the electricity cable plug-in with full battery,
without damaging my battery ?
I'm not an expert on that mather, but it should'nt be a problem because
the battery stop being recharged when it is full (it is managed directly
by the battery firmware I believe).
Many batteries can have problems if they don't have full
charge/discharge cycles, but it is not a problems with lithium-ion
batteries. If you always keep your battery full (because you keep it at
home or at your work place) Apple recommand to do the equivalent of a full
charge/discharge cycle once a month to keep the electron flowing
periodically. But you don't have to discharge it all in one time (you can
discharge it by 2/3 once and in few days by 1/3 and it still count as a
full cycle for your battery). That is not true for lead based batteries
and most others.
There is batteries that will have shorther life if they don't have full
charge/discharge cycles, but it is not your case.
Simon Valiquette
http://gulus.USherbrooke.ca
http://www.gulus.org
