13" MBA Battery - Full charge capacity

Discussion in 'MacBook Air' started by saintforlife, May 10, 2011.

  1. saintforlife macrumors 6502a

    Joined:
    Feb 25, 2011
    #1
    I have had my 13" 1.86/4/128 MBA for about 2 months now. The battery info is as follows:

    Charge Information:
    Charge Remaining (mAh): 6488
    Fully Charged: Yes
    Charging: No
    Full Charge Capacity (mAh): 6492
    Health Information:
    Cycle Count: 31
    Condition: Normal
    Battery Installed: Yes
    Amperage (mA): 0
    Voltage (mV): 8346

    Though I don't remember what the full charge capacity was when the computer was new, I have a feeling that it has gone down a bit. Is this much degradation normal after 2 months of intense use?

    Can you guys post your 'Full Charge Capacity' numbers here? What was it when it was new and what is it now?
     
  2. alust2013 macrumors 601

    alust2013

    Joined:
    Feb 6, 2010
    Location:
    On the fence
    #2
    My guess is that it's normal, given that system profiler tells you that it is normal condition. From those numbers, it looks like the design capacity was 6500mAh, so you're pretty close. If you download iStat pro, it will tell you what % your battery health is.
     
  3. halledise macrumors 65816

    Joined:
    May 7, 2009
    Location:
    Hamilton Island, Whitsundays, QLD Australia
    #3
    it's fine; no need to sweat it.
    my 'full charge capacity' is 6241 after 135 charges and still is classed as 'normal' by System Profiler.
    6500 or 6600 is new capacity from memory.
    Apple warranty is your friend here anyways.
     
  4. GGJstudios macrumors Westmere

    GGJstudios

    Joined:
    May 16, 2008
    #4
  5. Onimusha370 macrumors 6502a

    Joined:
    Aug 25, 2010
    #5
    the 13 inch has a capacity of 6700mah.
    i'm on about 70 cycles, and i've got 6300 remaining.
    wouldn't worry about the battery to much, it sounds normal :)
    try downloading coconut battery, its a useful app
     
  6. Whorehay macrumors 6502a

    Whorehay

    Joined:
    Feb 17, 2008
  7. Bottomsup macrumors regular

    Joined:
    May 10, 2011
    #7
    what constitutes a "cycle". If I leave it plugged in all day at my desktop how does this diminish battery life compared to discharging/recharging?

    Thanks
     
  8. GGJstudios macrumors Westmere

    GGJstudios

    Joined:
    May 16, 2008
    #8
    Read the Battery FAQ I posted. It answers your questions.
     
  9. Bottomsup macrumors regular

    Joined:
    May 10, 2011
    #9
    Thanks. Sorry I'm a newb on this forum. Can you point me to that? I didn't see a sticky and found this in the "FAQ" section, but I don't think this is what you were referring to.

    http://forums.macrumors.com/showthread.php?t=477767
     
  10. GGJstudios macrumors Westmere

    GGJstudios

    Joined:
    May 16, 2008
    #10
    Read the 4th post in this thread, 3 posts before your original post.
     
  11. Bottomsup macrumors regular

    Joined:
    May 10, 2011
    #11
    *embarrassed* thank you
     
  12. theSeb macrumors 604

    theSeb

    Joined:
    Aug 10, 2010
    Location:
    Poole, England
    #12
    I admire your patience.
     
  13. halledise macrumors 65816

    Joined:
    May 7, 2009
    Location:
    Hamilton Island, Whitsundays, QLD Australia
    #13
    yep - GGJstudios is always right ;)
     

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