macbook battery cuts dead no warning

Discussion in 'MacBook' started by dudeofblokes, Sep 3, 2008.

  1. dudeofblokes macrumors regular

    Joined:
    Nov 3, 2007
    Location:
    carrickfergus, northern ireland, united kingdom
    #1
    hi i have a first generation black macbook but recently the battery when low doesnt give a warning its low, im just working along and boom its off.

    when i see about 20 mins of use left i lower the screen brightness and the time goes up to about 35 mins but will cut dead within a few minutes.

    is there any known fix for this as its unreliable like this.

    software is fully updated leopard
     
  2. TEG macrumors 604

    TEG

    Joined:
    Jan 21, 2002
    Location:
    Langley, Washington
    #2
    Sounds like the battery is not accurately reporting its capacity, as the OS will only alert you when the battery reports that it is at 10%. Resetting the PMU and refreshing the battery may fix this, but likely you have a bad cell, and they only way to fix it would be to replace the battery.

    TEG
     

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