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Battery Life Issues

148 Views 3 Replies Latest reply: Nov 15, 2012 12:47 PM by Wayne Contello RSS
computergeek97 Calculating status...
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Nov 14, 2012 11:29 PM

Hello, I have a Late 2011 13" MacBook Pro [2.4GHz, 6GBs RAM, 500GBs HDD], I have had it now for about nine months. Just last week I was averaging about 5-6 hours of battery life running Chrome and Evernote. Within about a day, running the same applications my battery only lasts for about 2 hours. I am a student and use my laptop to take notes, so any battery life with less than 4 hours isn't possible. I took it in to my local Apple store, the "Genius" told me to reinstall Mountain Lion, so I did [archive and reinstall] and the same problem still occur.

MacBook Pro (13-inch Late 2011), OS X Mountain Lion (10.8.1)
  • sig Level 8 Level 8 (35,770 points)
    Currently Being Moderated
    Nov 15, 2012 12:44 AM (in response to computergeek97)

    Launch System Information from the Utilities folder. Select Power from the left side column. Copy and paste the info from the right side, Battery Information" into your reply post.

  • Wayne Contello Level 6 Level 6 (12,790 points)
    Currently Being Moderated
    Nov 15, 2012 12:47 PM (in response to computergeek97)

    Using the information from your previous post:


      Full Charge Capacity (mAh):          4971

      Health Information:

      Cycle Count:          191

      Condition:          Normal

      Battery Installed:          Yes

      Amperage (mA):          -1387



    the estimated time to empty from a full charge is: FCC / average current


    4971 / 1387 = 3.58 hours


    this is not as good as 4 hours but not as bad as 2


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