Macbook 8,2: Battery lasts about 1.5 hours.

Discussion in 'MacBook Pro' started by BJB Productions, Jan 1, 2012.

  1. BJB Productions macrumors 65816

    BJB Productions

    Joined:
    Nov 10, 2008
    #1
    Hi all,
    My work laptop seems to be having issues, is this normal:

    It's 22 weeks old, 14 load cycles, health is 96%.

    While using it for some light internet surfing, screen brightness low, fans running slow, no CD in or anything, my battery dies in about 1.5 hours. Would being connected as a network user have anything to do with this? Any ideas why?

    Just wondering if it's worth IS looking at it. I have not done a full calibration yet, should I try that?

    Thanks
     
  2. miles01110 macrumors Core

    miles01110

    Joined:
    Jul 24, 2006
    Location:
    The Ivory Tower (I'm not coming down)
    #2
    Calibration has nothing to do with actual battery life. It just calibrates your "percentage remaining" so your computer shuts off at 0% instead of at 20%.
     
  3. simsaladimbamba

    Joined:
    Nov 28, 2010
    Location:
    located
    #3
    ______________________________________________________
    Have a look at Activity Monitor (Applications / Utilities /) and select All Processes and sort by CPU to see what the culprit may be.

    image below uses sorting by CPU as an example
    [​IMG]
    Further reading:
    ______________________________________________________​

    ______________________________________________________
    This should answer most, if not all, of your battery questions:
    Apple Notebook Battery FAQ by GGJstudios
    ______________________________________________________
     
  4. GGJstudios macrumors Westmere

    GGJstudios

    Joined:
    May 16, 2008
    #4
    The built-in batteries in the newer Mac unibody notebooks come pre-calibrated and do not require regular calibration like the removable batteries.

    There are many factors that impact your battery life. See the BATTERY LIFE FROM A CHARGE section of the following link for details.

    This should answer most, if not all, of your battery questions:
     
  5. BJB Productions thread starter macrumors 65816

    BJB Productions

    Joined:
    Nov 10, 2008
  6. simsaladimbamba

    Joined:
    Nov 28, 2010
    Location:
    located
    #6
    Select ALL PROCESSES and sort by CPU, like in the screenshot I provided to explain how to use it.
     
  7. BJB Productions thread starter macrumors 65816

    BJB Productions

    Joined:
    Nov 10, 2008
  8. BJB Productions thread starter macrumors 65816

    BJB Productions

    Joined:
    Nov 10, 2008
    #8
    I did that, nothing more than what I posted above.
     
  9. Srirama macrumors member

    Joined:
    Dec 4, 2010
    Location:
    Chennai
    #9
    Select all processes from the drop down menu above.
     
  10. GGJstudios macrumors Westmere

    GGJstudios

    Joined:
    May 16, 2008
    #10
    Change this to "All Processes".
    Screen Shot 2012-01-01 at 10.42.52 AM.png
     
  11. TheIguana macrumors 6502a

    TheIguana

    Joined:
    Sep 26, 2004
    Location:
    Canada
    #11
    Two things I see in there:

    1) Skype is running and on your MBP it will force the use of the dedicated graphics which will reduce your battery life.
    2) Flash is running on your Mac. Flash is, always has been, and always will be a battery killer.
     
  12. GGJstudios macrumors Westmere

    GGJstudios

    Joined:
    May 16, 2008
    #12
    Both of those are addressed by the tips in the Battery FAQ I posted, using gfxCardStatus and ClickToFlash.
     

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