Terrible Battery Life on Macbook Pro GM

Discussion in 'OS X Mountain Lion (10.8)' started by ethan028, Jul 16, 2012.

  1. macrumors 6502a

    ethan028

    Joined:
    Apr 4, 2009
    Location:
    San Francisco, CA
    #1
    I have an early 2011 Macbook Pro and it just has insanely terrible battery life on Mountain Lion GM. Is this normal?
     
  2. 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. thread starter macrumors 6502a

    ethan028

    Joined:
    Apr 4, 2009
    Location:
    San Francisco, CA
    #3
    Yes, i've read and tried all of these. Still getting terrible battery life like an hour with low screen brightness no cpu hogging processes and only wifi on safari.
     
  4. macrumors Westmere

    GGJstudios

    Joined:
    May 16, 2008
    #4
    1. Launch Activity Monitor
    2. Change "My Processes" at the top to "All Processes"
    3. Click on the CPU column heading once or twice, so the arrow points downward (highest values on top).
    4. Click on the System Memory tab at the bottom.
    5. Take a screen shot of the whole Activity Monitor window, then scroll down to see the rest of the list, take another screen shot
    6. Post your screenshots.
     
  5. thread starter macrumors 6502a

    ethan028

    Joined:
    Apr 4, 2009
    Location:
    San Francisco, CA
  6. macrumors Westmere

    GGJstudios

    Joined:
    May 16, 2008
    #6
    It looks like you may have just restarted your Mac. There's nothing there that would indicate high power consumption. Do you have anything plugged into your Mac?
     
  7. thread starter macrumors 6502a

    ethan028

    Joined:
    Apr 4, 2009
    Location:
    San Francisco, CA
    #7
    Nope, currently in class and it's draining very fast.
     
  8. macrumors Westmere

    GGJstudios

    Joined:
    May 16, 2008
    #8
    How fast? iStat Pro will show you current battery stats. Also, are you going by the time remaining indicator on the Menu Bar, or by actual time until it shuts off?
     
  9. thread starter macrumors 6502a

    ethan028

    Joined:
    Apr 4, 2009
    Location:
    San Francisco, CA
    #9
    Time remaining when I click the battery Icon.
     
  10. macrumors Westmere

    GGJstudios

    Joined:
    May 16, 2008
    #10
    As the 2nd bullet point in the link I referred you to states:
     
  11. thread starter macrumors 6502a

    ethan028

    Joined:
    Apr 4, 2009
    Location:
    San Francisco, CA
    #11
    Any more tips for more battery?
     
  12. macrumors Westmere

    GGJstudios

    Joined:
    May 16, 2008
    #12
    Did you read the Battery FAQ? It has all you need to know.
     
  13. thread starter macrumors 6502a

    ethan028

    Joined:
    Apr 4, 2009
    Location:
    San Francisco, CA
    #13
    Yes.
     
  14. macrumors 6502a

    Joined:
    Jul 3, 2012
  15. macrumors newbie

    Joined:
    Mar 31, 2011
    Location:
    Northern Virginia
    #15
    I'm with Ethan. This morning, my battery life went from 98% to 15% in 75 minutes. The MBP was in screen saver mode part of the time, with nothing more demanding than Chrome running. No videos, no hard drive access, nothing of that sort.

    I am accustomed to getting ~4-5 hours easy - running the MBP with the GM of Mountain Lion is definitely draining my battery much faster than in the past (Snow Leopard).
     
  16. macrumors 6502a

    Senseotech

    Joined:
    Nov 23, 2009
    Location:
    Wilkesboro, NC
    #16
    I recall seeing somewhere that in 10.8, Chrome was causing the discrete GPU to kick in, meaning as soon as Chrome was opened and until it was totally quit, the machine was running off the GPU instead of the integrated chip, which would kill battery life.
     
  17. macrumors regular

    Joined:
    Jun 20, 2009
    #17
    I don't use Chrome, and I am experiencing reduced battery life on MBAir since 10.7.4 Combo Update. I have a separate HD on my Mac Pro exclusively running 10.8 but decided not to update the MBAir.
     
  18. macrumors 6502

    Joined:
    Sep 4, 2011
    Location:
    Salt Lake City, Utah
    #18
    Something must be wrong. Mine is the same if not better.
     
  19. macrumors newbie

    Joined:
    Jul 22, 2012
    #19
    Terrible Battery Life because of Mail?!?

    Since I upgraded to ML, the battery life on my MBP early 2011, is very poor (2hrs only). I located a problem with Mac Mail (Eg. to load the battery without mail open takes 1:35...if mail is running, it says 5:05)...can anybody confirm or is faceing the same? Anybody an idea how to improve? :eek:
     
  20. macrumors regular

    Joined:
    Jul 19, 2012
    #20
    Not sure if this will help but try this: cultm.ac/PLnAyf
     
  21. macrumors newbie

    Joined:
    Jul 22, 2012
    #21
    thanks, Nathan,...but it didn't help :confused:...this is what the activity looks like with mail open
     

    Attached Files:

  22. macrumors newbie

    Joined:
    Oct 9, 2010
    #22
    seems like you have a problem with mail then...
     
  23. macrumors newbie

    Joined:
    Jul 22, 2012
    #23
    anybody an idea, what I could do? How could I eg. re-install mail programm or ML GM? Actually it's only available in the Mac App store and I dont find a "re-install-button"...or some thing similar
     
  24. macrumors 6502a

    Joined:
    Feb 26, 2011
    Location:
    Las Vegas, NV
    #24
    Mail should not be using that much CPU.
     
  25. macrumors newbie

    Joined:
    Jul 22, 2012
    #25
    Thx – but how can one change that???
     

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