Battery Life on 2009 MBP

Discussion in 'OS X Mountain Lion (10.8)' started by fins831, Jul 30, 2012.

  1. fins831 macrumors 6502a

    Joined:
    Oct 7, 2011
    #1
    ML seems to have really took a beating on my battery life. I would wager I am seeing 30 percent less use out of my laptop since upgrading, the percentages just keep dropping. On average I prob got 4-5 hours of straight use, no video before, now I am lucky if I get 3 solid hours.

    Info: MBP unibody2009 8 Gig Ram, ML upgrade, 2.26 Ghz
    650 cycles
    Tests say the battery is doing just fine
    Brightness without charger is about 45 percent
    Energy Saver options are enabled and running/functioning
    Nothing heavy running in the background - only diff from SL -> ML is icloud

    Any ideas, or anyone seeing the same issue?

    Other than this one issue I am loving ML so far.
     
  2. GGJstudios macrumors Westmere

    GGJstudios

    Joined:
    May 16, 2008
    #2
    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.

    This should answer most, if not all, of your battery/charging questions:
     
  3. fins831 thread starter macrumors 6502a

    Joined:
    Oct 7, 2011
    #3
    There are many factors that impact battery life...but one major change from last week and this week is ML.

    Just wondering if anyone else has noticed any changes. I have read that time and time again and doesn't change the issue at hand...the only variable change since last week is mountain lion.
     
  4. GGJstudios macrumors Westmere

    GGJstudios

    Joined:
    May 16, 2008
    #4
    So did you go through the list? It addresses possible solutions, even if you just upgraded to ML.
     
  5. alFR macrumors 68020

    Joined:
    Aug 10, 2006
    #5
    Spotlight isn't reindexing your system volume, is it? That would hit battery life until it's finished.
     
  6. fins831, Jul 30, 2012
    Last edited: Jul 30, 2012

    fins831 thread starter macrumors 6502a

    Joined:
    Oct 7, 2011
    #6
    Only solution I think I could try is gfx thing. Rest I have tried already.
     
  7. fins831 thread starter macrumors 6502a

    Joined:
    Oct 7, 2011
    #7
    Spotlight is finished reindexing. It did it the first day.
     
  8. GGJstudios macrumors Westmere

    GGJstudios

    Joined:
    May 16, 2008
    #8
    There's nothing there that would indicate high resource usage, either by apps or the OS. Here's a few other things that may help improve performance and reduce power demands:
     
  9. fins831 thread starter macrumors 6502a

    Joined:
    Oct 7, 2011
    #9
    Just deleted some widgets and some stuff from startup folder, did a restart and just hit 5 percent, going to run it down to 1-2 percent and give it a full charge and see if any difference. Did a few performance tweaks here and there.
     
  10. MoxFulder macrumors newbie

    Joined:
    Jul 25, 2012
    #10
    Same problem as you with same specs.
    Check my posts...nothing helped so far. It IS because of ML.
     
  11. GGJstudios macrumors Westmere

    GGJstudios

    Joined:
    May 16, 2008
    #11
    And yet many, many others have no such problems with ML. It's not the upgrade; it's something specific to your computer.
     
  12. fins831 thread starter macrumors 6502a

    Joined:
    Oct 7, 2011
    #12
    Really don't want to do a clean install, but I will if this holds up for a week or so
     
  13. Ragnar-Kon macrumors member

    Joined:
    Jul 17, 2011
    #13
    Had the same issue with a late 2008 MBP after the Lion upgrade... knocked down my battery life by ~20% or so. Ended up doing a clean install and that fixed it. No idea what it was, but I have a feeling it was an application that just wasn't compatible with Lion.

    With Mountain Lion I didn't even bother doing the upgrade... just did a clean install. No noticeable drop in battery life this time around but all three of my batteries (my laptop is pre-unibody) are so beyond dead that I'm lucky to get 30 minutes out of them anyway.

    It has always been my policy with Windows machines to do a clean install for a major software upgrade, and I've since extended that same policy to Mac machines. Solves TONS of problems. I would ask friends with later MBPs to see if they have issues but they've all done clean installs as well.
     
  14. meme1255 macrumors 6502

    Joined:
    Jul 15, 2012
    Location:
    Czech Republic
    #14
    In my case it looks like Safari 6 is a problem - it has CPU usage spikes around 80% ( Just 6 tabs of Macrumors topics with click to plugin and adblock..)
     
  15. rangen macrumors regular

    rangen

    Joined:
    Mar 8, 2011
    #15
    Clean install has added an hour to the battery life of my 2010 MacBook Pro
     
  16. sigbiz macrumors newbie

    Joined:
    Jan 8, 2012
    #16
    Better battery life

    I'm getting around 1 hr longer also when doing office type stuff on my Macbook pro early 2011. That was with simple (not clean) install.
     
  17. MoxFulder macrumors newbie

    Joined:
    Jul 25, 2012
    #17
    Clean install of ML, still the same.
    Clean install of Lion, everything back to normal. Been on the battery for 3.5 hours now, it's at 70%

    Now, who said it has nothing to do with ML? :)
     
  18. GGJstudios macrumors Westmere

    GGJstudios

    Joined:
    May 16, 2008
    #18
    It's still something to do with your particular computer and installation. If it was a problem with ML, everyone would have the same problem, which they don't.
     
  19. MoxFulder macrumors newbie

    Joined:
    Jul 25, 2012
    #19
    Yes, and interestingly the other folks with the same issues also have a 2009 MBP, at least one of them also a 13". We'll see if there's going to be a solution one day.
     

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