Battery depletion on brand new MBA

Discussion in 'MacBook Air' started by benblanchard, Aug 26, 2012.

  1. benblanchard, Aug 26, 2012
    Last edited: Aug 27, 2012

    benblanchard macrumors newbie

    Joined:
    Aug 26, 2012
    #1
    I have a brand new MBA 2012 running Mountain Lion.

    I have recently installed the 10.8.1 update that claims to solve battery issues.

    Sometime the battery seems to deplete incredibly quickly, whereas others it seems to be about right.

    I recently charged the MBA up fully. When I turned on, the battery indicator showed 100% with 8:53 remaining.
    The battery then depleted to 85% under light use from Chrome and the Twitter app. At 85% it showed 3:07 hours remaining.

    [​IMG]


    Now obviously something is up, so I checked activity monitor but there's nothing using a high % of my CPU.

    [​IMG]


    So does anyone have any idea what's up with my battery?!

    Would appreciate some help.

    Thanks,

    Ben
     
  2. simsaladimbamba

    Joined:
    Nov 28, 2010
    Location:
    located
    #2
    For images wider than 800 pixel, please use the TIMG tags instead of the IMG tags by just adding a T in front of the [IMG] and closing [/IMG] tag, like [img] and [/img] to prevent horizontal scrolling.
    You can use the [​IMG] to edit your images and add the Ts.

    Also know, that the battery time is dependent on current CPU use and screen brightness.
    ______________________________________________________
    This should answer most, if not all, of your battery questions:
    Apple Notebook Battery FAQ by GGJstudios
    The F.A.Q. includes the following topics:
    • BATTERY INFORMATION
    • BATTERY LIFE FROM A CHARGE
    • AC POWER
    • CALIBRATION
    • BATTERY LIFESPAN
    • CHECKING STATUS AND HEALTH
    • CHARGING
    • WHAT IS A CYCLE?
    • BATTERIES ARE NOT COVERED
    • BULGING OR SWELLING BATTERY


    ______________________________________________________

     
  3. dcorban macrumors 6502a

    dcorban

    Joined:
    Oct 29, 2007
    #3
    My first thought is Chrome = Adobe Flash = battery drain.

    It would definitely explain your 85% but only 3 hours remaining paradox.
     
  4. benblanchard thread starter macrumors newbie

    Joined:
    Aug 26, 2012
    #4
    I enabled the ClickToPlay feature in chrome so flash doesn't run until I click on the object wanting to run flash. I've also installed an AdBlock extension.

    It's just a little confusing!
     
  5. Wowzera macrumors 6502a

    Joined:
    Oct 14, 2008
    Location:
    Brazil
    #5
    I have a macbook air mid2012 without flash installed and running mountain lion 10.8.1 and still have a battery life a lot worst than Lion.

    Mine shows now 4:50 at 100% and running only Microsoft Word and Safari. Mail in the background. Notification Center disabled.
     
  6. Roman2K~ macrumors 6502a

    Joined:
    Mar 11, 2011
    #6
    You need to list "All processes", not just "My processes". All = user + system. If you see "mds" and "mdworker", those are Spotlight indexing your disk (temporary).
     
  7. chacolo macrumors member

    Joined:
    Jul 10, 2012
    #7
    This does not look so bad. What was your brightness ?
     
  8. benblanchard thread starter macrumors newbie

    Joined:
    Aug 26, 2012
    #8
    Brightness is set to 4.

    ----------


    [​IMG]
     
  9. dominicdiep macrumors member

    Joined:
    Jun 11, 2012
    #9
    Yup. Battery is definitely worse for me on ML. At most I get around 4.5 hours.
     
  10. Statelymwhite macrumors regular

    Joined:
    Apr 1, 2011
    #10
    I was feeling the same way until I realized Bluetooth was on unnecessarily. I also tend to keep my brightness on the high side, though perhaps I should change that when running on battery.
     
  11. benblanchard thread starter macrumors newbie

    Joined:
    Aug 26, 2012
    #11
    This is my first Mac Portable so I wouldn't know how battery life differs with ML, but I was a little bit surprised at how low it got.

    ----------

    I turned Bluetooth off almost as soon as I first turned on the machine, so it can't have had an effect really.
     
  12. Biscotti macrumors regular

    Joined:
    Jun 25, 2008
    #12
    I got around 6:30 - 7 hours on Lion. I could go pretty much all day w/o charging… and now I'm getting around 5 hours of battery life IF I am lucky. Screen set to 4-5, and safari and word and excel use and mail.

    This is just ridiculous. My battery health is also at 92% after 10 months and 153 cycles…

    This is a problem. Just TEEEWWAAABBBLLEEEE.
     

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