Battery Life on Mountain Lion?

Discussion in 'MacBook Pro' started by Afbar1114, Jul 29, 2012.

  1. Afbar1114 macrumors 6502a

    Jun 18, 2012
    my battery life on my MBP late 2011 went down after installing mountain lion. anyone else having this issue? i charged it to 100% it said 5 hours or so used to say 8-9 hours. it was at 88% and said 4 hours.
  2. Gregintosh macrumors 68000

    Jan 29, 2008
    The "estimate" changes frequently. For example, you stop doing anything and you close your programs and it may say 9 hours. You run a quick video and it will say 2 hours. It just changes all the time.

    The best way to measure how much battery you really got is to actually measure with a clock and see how much percent you lose after X amount of hours of usage. That's the most accurate way.
  3. wiznet macrumors regular

    May 30, 2012
    Mine's still close to nine hours. Mind you, my brightness is about 3/4..

    What are your settings like?

    And as said above, the estimate changes quite frequently.
  4. Afbar1114 thread starter macrumors 6502a

    Jun 18, 2012
  5. fins831 macrumors 6502a

    Oct 7, 2011
    2009 MBP averaged 6-7 hours and now getting 3-5 depending on video watching.

    I def think there is a drain with this version, i've seen a battery drop of like 30 percent. Was just 28 percent, and did some browsing at half brightness, and 10 min later I am at 17 percent. I think I tweeted 3 times, wrote 1 email, and read 2 just seems to have iPhone like battery drain...
  6. GGJstudios macrumors Westmere


    May 16, 2008
    There are many factors that impact your battery life. See the BATTERY LIFE FROM A CHARGE section of the following link for details, including tips on how to maximize your battery life. From that section:
    This should answer most, if not all, of your battery/charging questions:
  7. Afbar1114 thread starter macrumors 6502a

    Jun 18, 2012
    Called apple. The rep said it's a known issue
  8. macrumors newbie

    Jun 23, 2010

    hope they fix this soon, its driving me nuts
  9. Newbie MacUser macrumors member

    Jun 22, 2012
    I ain't upgrading to ML until they get that battery life issue fixed...
  10. jbzcar macrumors regular

    May 11, 2012
    Mine went up on my late 2008 after upgrading to ML.
  11. Afbar1114 thread starter macrumors 6502a

    Jun 18, 2012
    so right now i have 37% battery life losing about 1% every 3minutes. and it says i i have an hour left. this is not good. i might go back to lion if this doesnt get fixed

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