unused ibook battery fix?

Discussion in 'PowerPC Macs' started by brendan007, Apr 1, 2006.

  1. macrumors newbie

    Joined:
    Mar 18, 2006
    #1
    I found out that an iBook battery i recently aquired wasnt used for a bit and now it wont charge properly or even hold a charge when it will (only when the computer is on). anybody know how to fix this? there is a problem with the microprocessor in the battery due to nonusage. anybody know how to fix this? anything is great
     
  2. macrumors 65816

    CoMpX

    Joined:
    Jun 29, 2005
    Location:
    New Jersey
    #2
    If the battery has just been left to sit for long enough with no activity then it can be permanently dead. It is not an issue with the microprocessor, the electrons simply wont hold a charge anymore.
     
  3. thread starter macrumors newbie

    Joined:
    Mar 18, 2006
    #3
    no it holds a charge. it held almost a 2 hour charge but it wont charge when its off. it will only chargbe when its on and spuratically. is there something i can do to reset it
     
  4. macrumors 65816

    CoMpX

    Joined:
    Jun 29, 2005
    Location:
    New Jersey
    #4
    Have you tried calibrating it? First, charge the battery up to 100%. Then, leave the computer running or watch a DVD or something to drain the battery down all the way. When the charge runs down to zero the iBook will go to sleep. Allow it to sleep for about 4 hours, then plug it in. Wake it up once it's plugged in, and turn it off. Then let it charge all the way to 100% again.

    This is called calibrating the battery, and it should solve your problem.
     
  5. macrumors 601

    mjstew33

    Joined:
    May 29, 2005
    Location:
    Illinois
    #5
    How could he do that if it won't charge the battery when it's off?

    TO OP: What iBook is it? What have you tried?
     
  6. thread starter macrumors newbie

    Joined:
    Mar 18, 2006
    #6
    um i tried calibrating it but it would only go to 35% by doing it when it was plugged in
     
  7. thread starter macrumors newbie

    Joined:
    Mar 18, 2006
    #7
    oh its an ibook g3 and ive tried reseting the pmu and calibrating but again it wont go past 35%
     
  8. macrumors 65816

    CoMpX

    Joined:
    Jun 29, 2005
    Location:
    New Jersey
  9. thread starter macrumors newbie

    Joined:
    Mar 18, 2006
  10. macrumors 601

    mjstew33

    Joined:
    May 29, 2005
    Location:
    Illinois
    #10
    Have other batteries worked successfully in charging? When was the last time it worked OK?
     
  11. macrumors 6502a

    asherman13

    Joined:
    Jul 31, 2005
    Location:
    SF Bay Area, CA
    #11
    The calibration technique listed above doesn't seem to me like it's the correct one; some batteries are calibrated differently. The previously mentioned procedure looks like that for the MacBook Pro or 15" PowerBook G4.

    From Apple's Knowledge Base article on notebook battery calibration:

    I don't see why you can't reboot the iBook once you plug in the adapter; the adaptor should be able to power the computer through the reboot and then start charging the battery. You do, however, need to wait until the battery is fully charged before unplugging the power adaptor after the calibration.
     

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