Battery Health significant drop within minutes?

Discussion in 'MacBook Pro' started by M. Malone, May 16, 2009.

  1. M. Malone macrumors 6502a

    M. Malone

    Joined:
    Mar 11, 2004
    #1
    Hello,

    Yesterday I had my MBP Classic with 89% battery health full charged.

    I decided to play Warcraft 3 for a bit, after 3 minutes I get the battery warning message, I was surprised that a battery that lasts 5 hours just the day before died this fast.

    So I check out iStat pro and it says my battery health is at 19%

    now my mac can't stay charged for longer than 40 minutes or so.

    how could this be explained?
     
  2. jmaquarry macrumors member

    Joined:
    Jan 14, 2009
    #2
    your mac may be out of sync with your battery?
    have you tried letting the battery COMPLETELY drain then charging to 100% before switching on...
    this may restore your battery health -
     
  3. misterredman macrumors 6502a

    misterredman

    Joined:
    Oct 3, 2007
    #3
    Right. Try calibrating your batterylike described here:

    http://support.apple.com/kb/HT1490

    Be sure to follow the pricedure exactly.

    If you still have the problem I guess you will need to take it to a store.
     
  4. maflynn Moderator

    maflynn

    Staff Member

    Joined:
    May 3, 2009
    Location:
    Boston
    #4
    As the others say you need to calibrate the battery, I believe apple recommends that you do that every 6 months. I only do it when I see symptoms that you're currently experiencing.
     
  5. M. Malone thread starter macrumors 6502a

    M. Malone

    Joined:
    Mar 11, 2004
    #5
    Sorry for the late update.

    Thank you to everyone who posted, I did exactly what you all said and it worked perfect.
     

Share This Page