6 Replies Latest reply: Mar 30, 2012 1:06 PM by AFOps
AFOps Level 1 Level 1 (0 points)

My computer has 85% battery but won't stay on without an adapter plugged in.  When plugged in, it says it has 84% battery and stays at that percentage.  It then reads that it will take 20 hours to charge.  Please if anyone knows anything I can do be much appreciated.

MacBook (13-inch Mid 2009), Mac OS X (10.6.8)
  • frederic1943 Level 6 Level 6 (9,980 points)

    Go to the Apple in the upper left corner and select About This Mac, then click on More Info, then select Power from the left hand column of the System Profiler. Copy and paste the Battery Information back here.

  • Cattus Thraex Level 4 Level 4 (1,715 points)

    Provided that the battery is indeed good, you may have a bad contact somewhere which, in practise, means you cannot use your mac otherwise than plugged in.

    REmove you battery and test it in another, similar mac. If it works there, the problem is inside your mac. If it dos not work either, the problem is with your battery. Put another reportedly good battery in your mac, if it works, it is all clear.

  • AFOps Level 1 Level 1 (0 points)

    The battery is brand new only a couple months old.  It is fully charged and just did it again....  Here is the information...

    Battery Power:

      System Sleep Timer (Minutes):          15

      Disk Sleep Timer (Minutes):          10

      Display Sleep Timer (Minutes):          15

      Wake On AC Change:          No

      Wake On Clamshell Open:          Yes

      Display Sleep Uses Dim:          Yes

      Reduce Brightness:          Yes

  • AFOps Level 1 Level 1 (0 points)

    Battery Power:

      System Sleep Timer (Minutes):          15

      Disk Sleep Timer (Minutes):          10

      Display Sleep Timer (Minutes):          15

      Wake On AC Change:          No

      Wake On Clamshell Open:          Yes

      Display Sleep Uses Dim:          Yes

      Reduce Brightness:          Yes


  • Cattus Thraex Level 4 Level 4 (1,715 points)

    Download coconut Battery and tell us what is displayed. Go for it in macupdate.com

  • AFOps Level 1 Level 1 (0 points)

    I have now been having to leave the charger on to use the computer even though it is fully charged.  If I take it off the charger it automatically shutsdown on me.  This is the info that coconut battery gave me:

    Current Charge 4795 mAh

    Maximum Charge 4838 mAh (99%)

    Current Capacity 4838 mAh

    Design Capacity 5020 mAh (96%)

    Mac Model: MacBook5,2

    Age: 34 months

    Battery loadcycles 138

    Battery temp 30.4 C

    Battery Power usage 0 watt

    Thanks again for the help.  Don't know but I havent updated in software in a couple of months dont know if that has to deal with anything.