iBook battery care q's

opik

macrumors member
Original poster
Oct 25, 2005
99
0
Cupertino, CA
I have a couple of questions..in order to maximize battery life and performance of my iBook G4...

1) Should I never charge the battery till it's completely drained?
2) If I use the laptop at home a lot, is it safe to keep the battery in fully charged while plugged to the wall?
 

iBookG4user

macrumors 604
Jun 27, 2006
6,596
2
Seattle, WA
1) Should I never charge the battery till it's completely drained?
It's good to use it until it is completely drained about once a month, this is called calibrating. Although normally you should use it until it's to about 20% left.

2) If I use the laptop at home a lot, is it safe to keep the battery in fully charged while plugged to the wall?
Yes, I do this all the time and I haven't seen any ill effects from it.
 

mkrishnan

Moderator emeritus
Jan 9, 2004
29,777
12
Grand Rapids, MI, USA
Yes, I do this all the time and I haven't seen any ill effects from it.
Yeah, Apple's designs are all made so that the battery is allowed to naturally discharge (it's not being used, just the fact that batteries slowly lose charge over time due to leak currents) until it reaches <95%, and the system won't attempt to recharge it until then. Then the system recharges it to 100%. So it's set up to not abuse the battery while you're on outlet power. I did this all the time with both my original battery, and now with the replacement from the recall, which I've used for about 40 cycles, and currently use about weekly for most of a cycle while traveling to a clinic in Jacksonville for the day. About once a month, as iBookG4User said, I actually let it finish draining all the way to zero and then recharge it; otherwise, I just plug it back in when I get home. :)
 

otis123

macrumors 6502a
May 4, 2006
555
0
I'm a little dissapointed with my ibook G4's battery I got It a year ago and its health is at 79% so It degraded faster than I thought
 

mkrishnan

Moderator emeritus
Jan 9, 2004
29,777
12
Grand Rapids, MI, USA
I'm a little dissapointed with my ibook G4's battery I got It a year ago and its health is at 79% so It degraded faster than I thought
How many cycles does it have? The amount you use it is a much bigger determinant than anything else. If you've used it 80-100 times, that's going to be about right.... you might try recalibrating it, though, if you haven't done that recently.
 

otis123

macrumors 6502a
May 4, 2006
555
0
How many cycles does it have? The amount you use it is a much bigger determinant than anything else. If you've used it 80-100 times, that's going to be about right.... you might try recalibrating it, though, if you haven't done that recently.
I don't know the cycles (I'm on my iPhone) but I calabrated last week