Macbook and battery %

Discussion in 'MacBook Pro' started by Hicks., Oct 29, 2006.

  1. Hicks. macrumors regular

    Hicks.

    Joined:
    Sep 27, 2006
    Location:
    UK
    #1
    Hi guys,

    I have a 3 week old macbook that won't charge over 98%. Since I've had it's had 12 charging cycles and I have let it run down so it switches itself off into sleep mode 3 times.

    The battery health shows as being 100% (according to a dashboard widget) yet it wont actually show 100% charged (the ac charger is green though).

    Any ideas, is this a defect? Sorry if it sounds trivial, but these things really bug me :rolleyes:
     
  2. Kamikaze macrumors member

    Joined:
    Oct 28, 2006
    Location:
    Denver, Colorado
    #2
    I noticed mine read the same way last night. Mine is three months old and it only shows 97%.
     
  3. Eraserhead macrumors G4

    Eraserhead

    Joined:
    Nov 3, 2005
    Location:
    UK
    #3
    It is trivial, don't worry about it. So you don't notice get it to show the battery life remaining instead. ;)
     
  4. ITASOR macrumors 601

    ITASOR

    Joined:
    Mar 20, 2005
    Location:
    Oneida, NY
    #4
    Mine has 30 something charge cycles and still charges to 100%. Call Apple, it's worth a try and you may get a new battery out of it!
     
  5. benthewraith macrumors 68040

    benthewraith

    Joined:
    May 27, 2006
    Location:
    Miami, FL
    #5
    Computers tend to do this from time to time, it's no reason to get a new battery, unless it charges to like 80% then stops. If it stops at 92% or below, I'd return the battery.
     
  6. Nuks macrumors 6502a

    Joined:
    Feb 25, 2006
    #6
    Yeah mine has been at 98/99% since about 2 weeks after I got it.
     
  7. UnclePaulie macrumors regular

    Joined:
    Apr 6, 2004
    Location:
    LA, CA
    #7
    I remember reading somewhere that your battery won't charge if it's already above 95%. So to get it to get up to 100%, you have to unplug it and discharge it fully and then let it fully charge back up without interruption.
    Take a look at the instructions for battery calibration in the MacBook manual.
     
  8. benthewraith macrumors 68040

    benthewraith

    Joined:
    May 27, 2006
    Location:
    Miami, FL
    #8
    He did. He let it run all the way down till it was completely drained, and then charged it back up.

    Speaking of which, I need to do that soon.
     
  9. UnclePaulie macrumors regular

    Joined:
    Apr 6, 2004
    Location:
    LA, CA
    #9
    Oops, I missed the part where he said he did that already. :eek:
     
  10. SMacDuff macrumors 6502

    SMacDuff

    Joined:
    Oct 21, 2006
    Location:
    Stockholm, Sweden
    #10
    Go to www.coconut-flavour.com and download and install coconutbattery v2.5. It'll tell you your Original battery capacity as well as your current battery capacity among other things. Very handy. Right now, my Macbook's original capacity is 5260mAh while my current capacity is 5280mAh. My Macbook is 4 weeks old and I calibrated the battery during my first week with it so it's in good shape.
     
  11. rw1979 macrumors member

    Joined:
    Oct 26, 2006
    Location:
    Dublin, Ireland
    #11
    Sorry for barging in but I was wondering...
    I'm usually near a power socket whenever I settle down to do some work, so if I leave my MBP plugged in all the time will that cause any issues with battery life in the long run?
     
  12. SMacDuff macrumors 6502

    SMacDuff

    Joined:
    Oct 21, 2006
    Location:
    Stockholm, Sweden
    #12
    In the long run you would likely diminish the carrying capacity of your battery. You should calibrate it regardless if you have it plugged in all the time or not. You should be fine doing once a month but anyone can correct me if my time is wrong as I'm a new Macjunkie. :)
     
  13. Abstract macrumors Penryn

    Abstract

    Joined:
    Dec 27, 2002
    Location:
    Location Location Location
    #13
    Better than perfect, I'd say. :rolleyes: So I'm guessing the software isn't very accurate?
     
  14. SMacDuff macrumors 6502

    SMacDuff

    Joined:
    Oct 21, 2006
    Location:
    Stockholm, Sweden
    #14
    Haha, hard to say! I would like to think it is just my good luck to get a superbattery yet you're probably right. In any case, the battery does seem to last a long time for me.
     
  15. tobefirst macrumors 68040

    tobefirst

    Joined:
    Jan 24, 2005
    Location:
    St. Louis, MO
    #15
    The coconut battery actually doesn't do anything except display already available information in a pretty interface. It gets the information from the System Profiler. So if the software is bad, it's Apple's software that is bad.
     
  16. walleyealx macrumors member

    Joined:
    Oct 22, 2006
    #16
    personally, i believe that your macbook is particularly smart.

    it knows that 9+7 > 1 + 0 + 0

    its just picking the highest number, it cant help it!
     
  17. Hicks. thread starter macrumors regular

    Hicks.

    Joined:
    Sep 27, 2006
    Location:
    UK
    #17
    Update

    After another battery calibration I am happy to say that it now reaches 100% again :)
     
  18. mullerj4 macrumors newbie

    Joined:
    Apr 15, 2007
    #18
    problem with a 12months battery with only 24% capacity

    My macbook pro is only 12 months old, 96 battery cycles, but its capacity is now reduced to 24%.
    It shutdowns quickly without system information, and re-calibration processs does not work.
    What is the issue ?
    a wrong serial ?

    my id for battery : A1175 serial KF6172CNTY48
     

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