MacBook Pro 2011 Battery

Discussion in 'MacBook Pro' started by MatDave, Jun 16, 2011.

  1. MatDave macrumors newbie

    Joined:
    Jun 16, 2011
    Location:
    Southampton, NY
    #1
    Hi,

    I bought a 2011 MacBook Pro a few weeks ago and I watch very carefully on my battery health. And I'm really worrying those days cause the health is only up to 97% and I'm wondering if this is normal, or if my battery health should still be on 100% (according to its usage and age)
    I hope someone can help me because I am literally FREAKING OUT! :eek:
    Thanks
    Mat :apple:


    Here are my battery stats :
    Current capacity : 6691
    Design capacity : 6900 (health 96%)

    Age of your mac : 18 weeks
    Battery loadcycles : 118
     
  2. AML225 macrumors regular

    Joined:
    Apr 11, 2010
    #2
    If 118 cycles reduces your battery's health by 3% that means you should get 100/3*118=3,893.333 (call it 3,894) cycles on your battery. What are you concerned about?
     
  3. Orlandoech macrumors 68040

    Orlandoech

    Joined:
    Jun 2, 2011
    Location:
    Salt Lake City, UT
    #3
    lol nice. People are too paranoid man.
     
  4. MatDave thread starter macrumors newbie

    Joined:
    Jun 16, 2011
    Location:
    Southampton, NY
    #4
    yes but when i get to the 3,894th cycle, it means my battery health is 0%. i dont even want it to be on 80%.
    i'm just wondering if my battery is normal, or if at this point it should still be on 100% ?
     
  5. Orlandoech macrumors 68040

    Orlandoech

    Joined:
    Jun 2, 2011
    Location:
    Salt Lake City, UT
    #5
    return it then
     
  6. ratzzo macrumors 6502a

    ratzzo

    Joined:
    Apr 20, 2011
    Location:
    Madrid
    #6
    That's completely normal. While it's easier to go down from 100 to 96, going from 96 to 90 can take a VERY long time. Usually battery levels oscilate between 80-95% for most of their useful years. Keep looking at those levels and you'll see how it just gets stuck there and doesn't decrease all that much at all.

    Remember that faulty batteries are covered by Apple 1yr standard warranty.
     
  7. ratzzo macrumors 6502a

    ratzzo

    Joined:
    Apr 20, 2011
    Location:
    Madrid
    #7
    Battery health isn't linear so this math is wrong. It descends from 100 to 96ish pretty quick but usually stays at that mark for a very long time.
     
  8. MatDave thread starter macrumors newbie

    Joined:
    Jun 16, 2011
    Location:
    Southampton, NY
    #8
    thanks a lot! your answer was very useful:)
    by the way, with that 1yr warranty, can i really get a free new battery just saying my battery health went down to like 93% (if it happens) ?
     
  9. Dark Void macrumors 68030

    Dark Void

    Joined:
    Jun 1, 2011
  10. MatDave thread starter macrumors newbie

    Joined:
    Jun 16, 2011
    Location:
    Southampton, NY
    #10
    oh thanks:) my battery appreciates your answer :D haha
     
  11. ratzzo macrumors 6502a

    ratzzo

    Joined:
    Apr 20, 2011
    Location:
    Madrid
    #11
    I'm not sure on the details, but I know the battery has to be at a certain minimum % (mAh) depending on the amount of cycles and time. So basically, no, they will only replace faulty batteries. And they will check the actual battery of course, so there is no way around that ;)
     
  12. MatDave thread starter macrumors newbie

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    Jun 16, 2011
    Location:
    Southampton, NY
    #12
    Oh ok!:) well thanks a lot anyway! you really did help me! :apple:
     
  13. GGJstudios macrumors Westmere

    GGJstudios

    Joined:
    May 16, 2008
    #13
    No. Batteries are only covered by warranty or AppleCare in the case of manufacturing defects. Also, it's normal for your battery health to fluctuate up and down over time.

    This should answer most, if not all, of your battery questions:
     
  14. Wanderer509 macrumors member

    Joined:
    Oct 28, 2007
    #14
    mine just went from 100>99>98>96 in the matter of days. on my 21 cycle right now. be happy op~~~
     
  15. vistadude macrumors 65816

    Joined:
    Jan 3, 2010
    #15
    My battery is at 90% health after 19 months and 68 load cycles. Real world performance is about 5.5 - 6 hours before it dies and it was rated for 7 hours performance. So it seems the battery can last quite a long time before it needs replacement.
     
  16. ghsNick macrumors 68030

    ghsNick

    Joined:
    May 25, 2010
    #16
    Is it better if you use your MBP as your main CPU (at home) to keep it plugged in always?

    Or is it better to let it go from 100% to failure and recharge?
     
  17. GGJstudios macrumors Westmere

    GGJstudios

    Joined:
    May 16, 2008
    #17
    No, it's not good to leave it plugged in all the time and it's not necessary to completely drain and recharge. Read the Battery FAQ for details.
     
  18. Dark Void macrumors 68030

    Dark Void

    Joined:
    Jun 1, 2011
    #18
    not always, but it's alright to leave it plugged in for a good amount of time, just make sure you disconnect the charger and let it run down every so often.

    you don't really have to be so strict in charging it up to 100%, letting it run down to 0%, and then repeat. just charge it when necessary.
     
  19. Martlets93 macrumors member

    Martlets93

    Joined:
    Jun 13, 2011
  20. GGJstudios macrumors Westmere

    GGJstudios

    Joined:
    May 16, 2008
    #20
    Read the CHECKING STATUS AND HEALTH section of the Battery FAQ.
     
  21. Martlets93 macrumors member

    Martlets93

    Joined:
    Jun 13, 2011
    #21
    Awesome. How do I find the CHECKING STATUS AND HEALTH section of the Battery FAQ?
     
  22. GGJstudios macrumors Westmere

    GGJstudios

    Joined:
    May 16, 2008
    #22
    Read post #13 in this thread. Have you read the thread?
     
  23. Martlets93 macrumors member

    Martlets93

    Joined:
    Jun 13, 2011
    #23
    Thanks! Now wasn't that easy?
     
  24. MatDave thread starter macrumors newbie

    Joined:
    Jun 16, 2011
    Location:
    Southampton, NY
    #24
    19months and 68 load cycles???:eek: seems like you have your mac always plugged in! :apple:
     

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