Battery time remaining 2:00 hours @ 79%

Discussion in 'MacBook Pro' started by BreakGuy, Feb 13, 2012.

  1. BreakGuy macrumors 6502a

    BreakGuy

    Joined:
    Nov 23, 2009
    Location:
    NZ, South Pacific
    #1
    Just upgraded to Lion (again), and yet again the battery issue remains.

    With just WiFi on and 2 tabs in Safari open I'm only getting 2 hours of battery at 79%.

    Fix needed. I heavily rely on a decent battery life.
     
  2. ABernardoJr macrumors 6502

    Joined:
    Dec 19, 2006
    #2
    Can you check your Activity Monitor (All Processes) for the CPU and see if anything's taking up a high %?
     
  3. GGJstudios macrumors Westmere

    GGJstudios

    Joined:
    May 16, 2008
    #3
    Launch Activity Monitor and change "My Processes" at the top to "All Processes", then click on the CPU column heading once or twice, so the arrow points downward (highest values on top). Then look to see what may be consuming system resources.

    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:
     
  4. GuitarG20 macrumors 65816

    GuitarG20

    Joined:
    Jun 3, 2011
    #4
    have you reset your SMC after upgrading to Lion? That is what improved battery life significantly for me.
     
  5. BreakGuy thread starter macrumors 6502a

    BreakGuy

    Joined:
    Nov 23, 2009
    Location:
    NZ, South Pacific
    #5
    Nothing seems to be using the CPU up. The most the being used by a single process is nothing more than 1% of the CPU.

    Also like to note that screen brightness is at 50%, keyboard backlight is at 0% and bluetooth, time machine and everything else (other than WiFi) is off.
     
  6. BreakGuy thread starter macrumors 6502a

    BreakGuy

    Joined:
    Nov 23, 2009
    Location:
    NZ, South Pacific
    #6
    Yes I did. It was one of the first things I did.
     
  7. ABernardoJr macrumors 6502

    Joined:
    Dec 19, 2006
    #7
    If you go to System Profiler maybe you can check if the condition of your battery isn't "Normal" or something, or maybe Coconut Battery could help with showing the percentages of the battery capacity compared to the original capacity. It's one thing to have numbers lower than the advertised/marketed times for battery life but this does seem unusual.

    You said you upgraded to Lion and the battery problems persist, did they persist prior without Lion or do you mean they came back from when you used Lion in the past?
     
  8. throAU macrumors 601

    throAU

    Joined:
    Feb 13, 2012
    Location:
    Perth, Western Australia
    #8
    You may have something running which uses core animation. e.g.... flash, twitter client, VLC, etc.

    Now, its a bit of a pain in the butt, but currently core animation using apps forces the MBP to turn on the discrete GPU, which KILLS battery life.

    Download gfxcardstatus, and set it to use integrated graphics unless you're running something that NEEDS fast 3d.

    I've had battery estimates of 9 hrs on my 15" pro before doing general basic web stuff. However, turn the discrete GPU on, and it drops to 2.5hrs pretty quick, even if its sitting there mostly idle.

    Its a bit of a bug that apple really need to fix, but in the meantime... gfxcardstatus is your friend.





    edit:
    bah... didn't realise you had a 13" with integrated only GPU. ignore..... but in case anyone with a 15 or 17 has similar issues... see above :D
     
  9. BreakGuy, Feb 14, 2012
    Last edited: Feb 14, 2012

    BreakGuy thread starter macrumors 6502a

    BreakGuy

    Joined:
    Nov 23, 2009
    Location:
    NZ, South Pacific
    #9
    I was originally on Snow Leopard without any problems. I upgraded to Lion and noticed the battery issues that others were experiencing with it. I downgraded back to Snow Leopard and experienced a normal battery life again. This time I reupgraded to Lion and the battery issues are back.
     
  10. GGJstudios macrumors Westmere

    GGJstudios

    Joined:
    May 16, 2008
    #10
    As it says in the Battery FAQ I posted, under BATTERY LIFE FROM A CHARGE:
     
  11. thundersteele macrumors 68030

    Joined:
    Oct 19, 2011
    Location:
    Switzerland
    #11
    Either:
    - downgrade again, or
    - make a clean Lion install and check if the issue persists
     

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