Strange Battery Behavior

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

  1. ethandt macrumors member

    Joined:
    Jul 26, 2009
    #1
    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

    GGJstudios

    Joined:
    May 16, 2008
    #3
    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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