94% battery after 8 months?

Discussion in 'MacBook Air' started by atMac, Jul 21, 2012.

  1. atMac macrumors 6502

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  2. MacDawg macrumors P6

    MacDawg

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  3. atMac thread starter macrumors 6502

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    #3
    Wow, so few cycles, are you plugged in all the time?
     
  4. MacDawg macrumors P6

    MacDawg

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    #4
    Yep, I stay plugged in most of the time with my Thunderbolt display at home and my ACD at work
     
  5. thadoggfather Suspended

    thadoggfather

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    Oct 1, 2007
    #5
    66 cycles for me, almost 8 months old as well (mid 2011 base 13") with 92% health according to iStat widget.

    Completely discharging and recharging should help but I haven't done that in a good while.
     
  6. Chipg macrumors regular

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    Aug 17, 2010
    #6
    96 cycles, 11 months with 93% left but I just did the coconut battery update and it jump up 1% higher after to 94%...

    I have a feeling the battery is going to die off fast.

    78% of all statistics are made up or are false. :)
     
  7. bwhinnen macrumors 6502

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    Apr 15, 2010
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    San Diego
    #7
    I must be lucky then.

    Screen Shot 2012-07-22 at 9.03.27 PM.png

    I generally either run it on battery for a few hours at a time or it is on the charger. It is left on battery overnight when it sleeps, rarely on charge.
     
  8. The-Pro macrumors 65816

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    Germany
    #8
    completely normal. It fluctuates greatly. In a week it can be back up at 98 or something. Nothing to worry about. Only if it severely drops and is under 80% and stays there is there reason to worry.
     
  9. NeonBible macrumors member

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    Jun 26, 2012
    #9
    Wow, how is that possible? I got like 97 % battery health after the first week. But is it bad for the battery to let it stay on charge constantly when using an external monitor? Cause I never let it stay on charge if I don't have to, because of the fear to mess up the battery.
     
  10. Xikum macrumors 6502

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    Oct 19, 2011
    #10
    The battery calculator is not 100% accurate; it can fluctuate. Its just an approximation.
     
  11. atMac thread starter macrumors 6502

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    Jun 20, 2011
    #11
    Sonds like you use my battery the same way that I do, I was lower than you just 2-3 months after purchase.
     
  12. andyriot macrumors member

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    Jul 1, 2010
    #12
    I have a mid 2010 MBP and about a week ago it had 95% capacity.... after using a (wrong) 60W charger a few times... it has now dropped considerably to 87% capacity. FML!!
     
  13. wordoflife macrumors 604

    wordoflife

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    Jul 6, 2009
    #13
    Yeah it's normal. It will go up and down every now and then.
    So far on my laptop:

    [​IMG]

    That being said, I don't think I've ever calibrated my laptop.
     
  14. MacDawg macrumors P6

    MacDawg

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    #14
    I should discharge my battery more often I suppose
     
  15. gnasher729 macrumors P6

    gnasher729

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    Nov 25, 2005
    #15
    One discharge per month seems to be recommended. Calibration is not really necessary at all, it doesn't improve battery life, it just makes the percentage display more accurate.
     
  16. MacDawg macrumors P6

    MacDawg

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    #16
    I don't even do that much actually
     
  17. atMac thread starter macrumors 6502

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    #17
    Ive fully discharged and then recharged it as it used to be[still is?] recommended on Apple.com. about 3 times since I have owned it. Not noticed much of a change.
     
  18. miles01110 macrumors Core

    miles01110

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    #18
    Because your battery is fine?
     
  19. GGJstudios macrumors Westmere

    GGJstudios

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    May 16, 2008
    #19
    The built-in batteries in the newer Mac unibody notebooks come pre-calibrated and do not require regular calibration like the removable batteries in older Apple notebooks.

    It is perfectly normal if your battery health (maximum capacity) is more or less than 100%, even when brand new, or if it fluctuates up or down over time. For further details, read the CHECKING STATUS AND HEALTH section of the following link.

    This should answer most, if not all, of your battery/charging questions:
     
  20. andyriot macrumors member

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    Jul 1, 2010
    #20
    since I posted that message my capacity is somehow back up to 92%!

    it had been down in the 85% region for a few days and I was afraid it wasn't going to come back. I got a new 85W charger and have been using it for a day or two now. Seems like its coming back to full health almost.... strange.
     
  21. n1tut macrumors regular

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    Nov 20, 2010
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    Glen of Newmill, Keith, Scotland
    #21
    Apple replaced the battery on my 2010 11" FOC a couple of weeks ago.

    It was down to 70% after 474 cycles in 18 months, so a fair bit below their expectation of 80% at 1,000 cycles.

    tut
     
  22. Nioxic macrumors regular

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    Aug 13, 2011
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    Denmark
    #22
    mine shows 95%
    11 months old
    loadcycles: 62

    i barely use my laptop though... :)

    bought it for school, but I'm done now! :D
     
  23. J&JPolangin macrumors 68030

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    Jul 5, 2008
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    Thule GL @ the TOW
    #23
    My whitebook with a removable battery is at 41 months old with 154 cycles and 95% health = I calibrate it once a month...

    I also was considering a Sandy Bridge 13" air but noticed that even the 13" didn't seem to get that much better battery life than my whitebook so I think I've decided to return it considering the battery in the MBA is ~+1500 mAmp hrs better a battery and I still get 5+ hours on my whitebook unplugged with light wireless/wired use of email and open office...
     
  24. andyriot macrumors member

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    Jul 1, 2010
    #24
    Just a random update here. My battery is back to 87% health even after using the new 85W charger now. Ugh! It fluctuates some but seems to be settling down around there.
     
  25. Dangerous Theory macrumors 68000

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    Jul 28, 2011
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    UK
    #25
    Damn, 154 cycles in 41 months! Is that because you rarely use it, or it's mostly on AC
     

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