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

    Oct 16, 2008
    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

    Aug 11, 2009
    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

    Oct 16, 2008
    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


    Oct 9, 2005
    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


    Jan 26, 2008
    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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