Battery suddenly dies when it says it still has ~20 minutes, even after calibration

Discussion in 'MacBook' started by devburke, Sep 1, 2009.

  1. devburke Guest

    Joined:
    Oct 16, 2008
    #1
    I’ve calibrated my battery and everything, but it always suddenly drops out well before it says it will, often before I even get a low battery warning. Here’s what System Profiler says:

    Should I contact AppleCare? Will I get a new battery? I’m still under my plan, cuz this is a mid-2007 MacBook and I bought the three year AppleCare plan.
     
  2. run-kmc macrumors member

    Joined:
    Aug 11, 2009
    #2
    Capacity is 5083 mAh. That shows you were at 467 mAh. Less than 10%.

    I'd keep a closer eye on percentage, not time left. That's just an estimate.
     
  3. devburke thread starter Guest

    Joined:
    Oct 16, 2008
    #3
    Well yeah, that's cuz I posted this right after plugging in after it suddenly died. It shouldn't even be that close to 10%. Looking at the percent would be just as misleading as the time left, since the whole thing seems to be off about how much battery power is left. I don't even get the low battery warnings any more, so I don't get safe sleep either, I have to cold boot.
     
  4. xraydoc macrumors demi-god

    xraydoc

    Joined:
    Oct 9, 2005
    Location:
    192.168.1.1
    #4
    My daugter's original white Core Duo MacBook is doing the same thing. I've tried resetting the PMU/SMU (whichever this machine has), PRAM and repeated battery calibrations.

    I think I'll just have to cough up for a new battery.
     
  5. Thiol macrumors 6502a

    Thiol

    Joined:
    Jan 26, 2008
    #5
    Try talking to Applecare. It just sounds like an old battery, not a broken one, but maybe they'll exchange it. Who knows...
     

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