iBook battery stays at 99% -why?

john_satc

macrumors 6502
Original poster
Feb 14, 2005
398
0
B'ham Uk
Each time i charge up my iBooks battery, the percantage indicator says it is at 99%, it never reaches 100% - why?
 

0098386

Suspended
Jan 18, 2005
21,576
2,908
maybe im one of the unlucky ones. my PB's battery drops down to 95% sometimes, and thats when its plugged in for days at a time! a quick battery calibration and its back to 100% mind.
 

SoTW[Kensai]

macrumors newbie
Mar 26, 2005
1
0
Mine also sometimes stops at %99 (sometimes can even be %97) , but I've seen %100. But now here comes the real interesting part :eek: ; If the battery level falls below the %70-%65s it immediately shows zero, and goes to sleep (the charge is depleted). I plug the cable and it starts charging form %0, it goes about %20s and then immediately jumps to %90s and charges fully at %99-%100. But this generally is because of the misshown percentage. I click to show the time remaing when it is fully charged and it says 7 hours remaining but it actually goes about 2 hours. I launced X resourse Graph and looked at the current level, which now shows 8200mAH (it also shows zero remaining when remaing curent falls below 6500mAH), considering that I've seen values about 3000-3500mAH top when in normal circuimstances.
The repairs and system updates doesn't made any difference. But I didn't try callibration, if I remember correctly it is only under OS9, isn't it?
 

IJ Reilly

macrumors P6
Jul 16, 2002
17,892
1,477
Palookaville
Don't worry about it, so long as it charges above around 95% indicated full charge. If it won't charge above 95% (after calibration), you might have a bad battery. Apple replaced mine under warranty for this reason.
 
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