Battery Capacity

Discussion in 'MacBook' started by pacmania1982, Nov 10, 2015.

  1. pacmania1982, Nov 10, 2015
    Last edited: Nov 10, 2015

    pacmania1982 macrumors 6502a

    pacmania1982

    Joined:
    Nov 19, 2006
    Location:
    Birmingham, UK
    #1
    Quick question guys, I thought I'd just check the battery capacity of my MacBook that I bought in June.

    I'm using the latest version of Coconut Battery (3.2.1) and I'm slightly alarmed that the capacity has gone down by 12% since I bought it.

    Should I be concerned? I tend to run it on battery, then use it while its charging, then take it off charge when it gets to 100%, then rinse and repeat. I don't let the battery get down to 0%, usually 2-3% when I get a notification that the battery is running low.

    To me, I seem to have lost a lot of capacity in the few months I've had the machine. I'm also not sure why the capacity shows as 8500mAh's the last time I ran it, and now shows almost half that capacity??!

    Is there anything I could be doing differently or I could do to try to improve my battery?

    Thanks

    pac

    Screen Shot 2015-11-10 at 20.04.10.png Screen Shot 2015-11-10 at 20.04.20.png
     
  2. lite426 macrumors regular

    Joined:
    May 24, 2013
    #2
    To lose over a 1/10th of battery life in 5 months is crazy. Mine is at 94% after 2 months. This is unacceptable and false advertising by Apple. They should quote their battery figures for the MacBook with 1/10th cut off.
     
  3. Queen6 macrumors 603

    Queen6

    Joined:
    Dec 11, 2008
    Location:
    Enjoying Better Things
    #3
    There are already multiple threads on the same subject. You will very likely find more information, comparisons and value there, as opposed to starting a new thread on the same subject.

    To name but a few
    http://forums.macrumors.com/threads/months-used-number-of-cycles-mah-reading-rmb-2015.1903482/
    http://forums.macrumors.com/threads...es-on-rmb-here-are-the-battery-stats.1926473/
    http://forums.macrumors.com/threads/macbook-12-battery-health-at-84.1931922/

    Would be good if one of the Mod`s merge all these threads concerning 12" rMB battery capacity...

    Q-6
     
  4. palmwangja macrumors regular

    palmwangja

    Joined:
    Apr 12, 2015
  5. art6969 macrumors newbie

    Joined:
    Nov 16, 2015
  6. Queen6 macrumors 603

    Queen6

    Joined:
    Dec 11, 2008
    Location:
    Enjoying Better Things
    #6
    Note to those with rapidly diminishing battery capacity; Have your rMB checked by Apple as the Genius can run extended diagnostics. Some members of the forum have found that there was issue with the Logic Board (resistors), subsequently Apple replaced both the battery & Logic Board under warranty.

    At very least you should ensure the issue is documented in Apple`s system, those in the EU and UK have strong consumer protection use it to your advantage...

    Q-6
     
  7. theSeb macrumors 604

    theSeb

    Joined:
    Aug 10, 2010
    Location:
    Poole, England
    #7
    How did you own the Macbook in 2014? What am I missing here?
     
  8. pacmania1982 thread starter macrumors 6502a

    pacmania1982

    Joined:
    Nov 19, 2006
    Location:
    Birmingham, UK
    #8
    If you are refering to my screenshot, you can ignore the 2014 numbers. These were from my Retina MacBook Pro that I had before. I've since removed these entries from Coconut Battery history. It must have been copied over when I migrated over.
     
  9. theSeb macrumors 604

    theSeb

    Joined:
    Aug 10, 2010
    Location:
    Poole, England
    #9
    Ahh ok. I got it.
     
  10. ragnu macrumors member

    Joined:
    Mar 15, 2015
    #10
    If it's any reassurance to you, I was down to 88%, with about 40 loadcycles according to Coconut Battery, a couple of weeks ago. Now I'm up to 96,6% with 49 loadcycles! Go figure. So I'm going to stop worrying.
     
  11. mackie8 macrumors 6502

    Joined:
    Nov 6, 2014
    #11
    mine is only 2 load cycles but capacity is 99.8% ...
    degrade very fast ...... my air 11 was 14 load cycles but still at 100%....
     
  12. kingofwale macrumors 6502a

    kingofwale

    Joined:
    Apr 24, 2010
    #12
    82% after 219 cycles. so close to a replacement now
     
  13. tim1000 macrumors newbie

    Joined:
    Sep 16, 2014
    #13
    mine has been around 89% steady, should i be concerned?
     

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