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iBook auto-sleeps with 1 hour left on battery

Discussion in 'PowerPC Macs' started by wordmunger, Nov 9, 2005.

  1. macrumors 603


    My iBook (in Panther) has an annoying habit. It will run the battery down to about 1 hour to 45 minutes left. Then it will auto-sleep, with no warning, and nothing wakes it up until I plug it in.

    It seems like a calibration problem, but to calibrate the battery, shouldn't I do this exact thing -- run the battery until it auto sleeps? So in effect, I've been calibrating my battery when this happens.

    But if I'm calibrating, then the next time I use the computer, the battery life should be adjusted correctly, right? But it's not -- the same problem keeps recurring.

    The other battery problem I have is that sometimes I'll wake my fully-charged computer from sleep and then I'll get a warning that my battery is nearly dead. The little battery-meter will say that I've got, like 3 minutes left. Sometimes in a minute or two, the battery meter will readjust itself to 3.5 hours or something, but other times, it will auto-sleep and I'll need to wake it up again.

    Anyone had either of these problems before? Any solutions?
  2. macrumors 6502

    New Battery?

    Sometimes when I charge my iB it'll say I got around 3 hrs.

    Use it for five minutes, it drops down to 1.5 hrs.

    I think we both need to get new batteries... ;)
  3. macrumors 603


    I still get a decent 2-plus hours on my battery, which is only a year old. it just seems like the charge indicator shouldn't be so neurotic.

  4. macrumors 68000


    Tried resetting PMU?
    You should be greatful for having a time meter at all :p This pismo infinitely says "calculating remaining...". Percentage is the only way... *sobs*
  5. macrumors 601


  6. Administrator/Editor


    Staff Member

    That's a dying battery...mine used to do that...would slowly run down to ~40%, and then go to sleep with no warning. Then it would happen at ~70%. Now it happens at 92%, about five minutes after I unplug it.
  7. macrumors 6502a

    Will Cheyney

    Download this awesome app - coconutBattery.

    Upon loading it up you'll be presented with a similar window to this:

    Compare the original battery capacity to the current one. If it's low then you will need to replace the battery.
  8. macrumors 601


    excellent app but my mac was bought in April ? i doubt it is really 19 months old ?

    Attached Files:

  9. macrumors 6502a

    Will Cheyney

  10. macrumors 6502a

    Will Cheyney

    Here's my G5's card :)

    Attached Files:

  11. macrumors 603


    That's cool, but unfortunately it requires Tiger. So what should I do with my $100 -- upgrade to Tiger or get a new battery?
  12. macrumors 601


    thats cool ,
  13. macrumors 6502a

    Will Cheyney

    I highly suggest getting Tiger. You never know, it may fix your problems. If your battery is knackered you generally know about it because it doesn't last very long on a single charge (as in <1 hour).
  14. macrumors 68000


    I had this problem with a 17" PowerBook back in March of 2004. My PB would get down to 20 minutes remaining and then go to sleep and would not wake back up unless charging/charged. Apple thought it was the battery and replaced it.....that did not solve the problem. It ended up being the logic board.
  15. macrumors 6502a

    Will Cheyney

    Oh dear...
    I don't see how it can be logic board related though. I mean, if the computer keeps crashing or refuses to start up that's one thing - but working faultlessly until the battery starts to drain?

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