iBook battery stays at 99% -why?

Discussion in 'Macintosh Computers' started by john_satc, Mar 26, 2005.

  1. john_satc macrumors 6502

    Joined:
    Feb 14, 2005
    Location:
    B'ham Uk
    #1
    Each time i charge up my iBooks battery, the percantage indicator says it is at 99%, it never reaches 100% - why?
     
  2. leekohler macrumors G5

    leekohler

    Joined:
    Dec 22, 2004
    Location:
    Chicago, Illinois
    #2
    Hmm...don't know. Mine always charges to 100%, but mostly when it's plugged in.
     
  3. Applespider macrumors G4

    Applespider

    Joined:
    Jan 20, 2004
    Location:
    looking through rose-tinted spectacles...
    #3
    You could try recalibrating the battery but I wouldn't worry too much. My Powerbook sometimes shows 100% but regularly hovers around 98-99%.
     
  4. Dagless macrumors Core

    Dagless

    Joined:
    Jan 18, 2005
    Location:
    Fighting to stay in the EU
    #4
    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.
     
  5. SoTW[Kensai] macrumors newbie

    Joined:
    Mar 26, 2005
    #5
    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?
     
  6. eXan macrumors 601

    eXan

    Joined:
    Jan 10, 2005
    Location:
    Russia
    #6
    When I had and old G3 300 MHz iBook, the battery also charged only to 99%

    :confused:
     
  7. john_satc thread starter macrumors 6502

    Joined:
    Feb 14, 2005
    Location:
    B'ham Uk
  8. IJ Reilly macrumors P6

    IJ Reilly

    Joined:
    Jul 16, 2002
    Location:
    Palookaville
    #9
    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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