Strange Battery Behavior

Discussion in 'MacBook Pro' started by ethandt, Jan 6, 2011.

  1. ethandt macrumors member

    Jul 26, 2009
    I have an early 2009 MPB, 2.4 15. The other day I unplugged by MB, fully charged, and within 20 minutes the battery went dead. I checked my iStat and Coconut and both told that my battery health had dropped from 94% down to 22%. So plugged it back in, let it fully charge, unplugged and let it discharge fully etc. and then my battery health went to 1% and the Apple Battery icon up top said to service the battery. So, completely dead. I haven't had time to deal with it so have just kept it plugged in and now, 4 days later my battery health is back up to 93%?

    Any ideas?
  2. GGJstudios macrumors Westmere


    May 16, 2008
    Have you properly calibrated your battery? (It's more than just draining and recharging it).

    This should answer most, if not all, of your battery questions: Apple Notebook Battery FAQ

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