Battery Health

Discussion in 'MacBook Pro' started by gregrose, Nov 23, 2010.

  1. gregrose macrumors 6502

    Joined:
    Jun 24, 2010
    #1
    Hey all, I have iStat & my battery health has always been at 100, but today I notice its at 98%...i have 60% battery right now, does this mean my battery health will never be at 100 again?

    13inch mbp, bought it in september...has usually always been at 100%
     
  2. spinnerlys Guest

    spinnerlys

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    Sep 7, 2008
    Location:
    forlod bygningen
    #2
  3. gregrose thread starter macrumors 6502

    Joined:
    Jun 24, 2010
    #3
    ok so basically just drain the battery till it forces sleep & just leave it to charge overnight? or should i not charge it right away after it forces sleep?
     
  4. GGJstudios macrumors Westmere

    GGJstudios

    Joined:
    May 16, 2008
    #4
    No. Read the FAQ link spinnerlys posted. It has the exact steps for proper calibration.
     
  5. qawes macrumors regular

    qawes

    Joined:
    Jun 27, 2010
    #5
    after it forces sleep leave it like that for 5 hours or more.
     
  6. gregrose thread starter macrumors 6502

    Joined:
    Jun 24, 2010
    #6
    ok so leave it in forced sleep mode for 5-6 hours, then leave it to charge for a day?
     
  7. GGJstudios macrumors Westmere

    GGJstudios

    Joined:
    May 16, 2008
    #7
    Read the steps. There's more to it than that, beginning before you drain it.
     
  8. qawes macrumors regular

    qawes

    Joined:
    Jun 27, 2010
    #8
    no, just let it charge normally to 100%, after that you can use it anyway you like.
     
  9. gregrose thread starter macrumors 6502

    Joined:
    Jun 24, 2010
    #9
    i did exactly what you guys said, its still at 98%, didnt work...great
     
  10. GGJstudios macrumors Westmere

    GGJstudios

    Joined:
    May 16, 2008
    #10
    Yes, it did work. If you calibrated properly, that means your reading is accurate, and you have 98% battery health remaining.
     
  11. gregrose thread starter macrumors 6502

    Joined:
    Jun 24, 2010
    #11
    i thought calibrating it would get it back to 100% health again, lame...its only had 40 cycles.
     
  12. GGJstudios macrumors Westmere

    GGJstudios

    Joined:
    May 16, 2008
    #12
    No, calibrating makes your reading more accurate. Nothing restores battery health. Batteries die over time. This should answer most, if not all, of your battery questions: Apple Notebook Battery FAQ
     
  13. jetblk328i macrumors 6502

    Joined:
    Apr 20, 2010
    #13
    mine fluctuate all the time, even without calibrating. my last cycle said i was at 96, now its back up to 98.
     
  14. GGJstudios macrumors Westmere

    GGJstudios

    Joined:
    May 16, 2008
    #14
    That's perfectly normal, as stated in the FAQ.
     

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