Please post your Battery Capacity

Discussion in 'MacBook Air' started by tigres, Nov 16, 2008.

  1. tigres macrumors 68040

    tigres

    Joined:
    Aug 31, 2007
    Location:
    Land of the Free-Waiting for Term Limits
    #1
    As the heading states, please post your battery capacity on your Gen 2 Air.

    Just received mine on Thursday...


    I have the following unfavorable results.

    Capacity: 4789 mAh
    94% Life
    Original Capacity 5090 mAh
    Battery loadcycles 11
    Age of my Mac 2 Weeks....

    Uh, am I correct in assuming that my capacity should be around 5200 mAh and that this is indeed a defective battery?

    Please share with me if I am incorrect, as web browsing after a full recycle is about 2.25 hours, without doing anything else.

    Thanks.
     
  2. iPhonePhan macrumors regular

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    Apple FanBoy Land
    #2
    How are you getting that information? I can't find original capacity in apps like iStat Pro. Lemme know and I'll share my findings since I've got a brand spankin' new MBAir :)
     
  3. tigres thread starter macrumors 68040

    tigres

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    #3
    Google coconutbattery. Works well, and gives all the info.

    Kthx
     
  4. iPhonePhan macrumors regular

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    Apple FanBoy Land
    #4
    Thanks! Here's my battery stats:

    Current Battery Capacity: 4743 mAh
    Original Battery Capacity: 5090 mAh
    93%
    Battery-Loadcycles: 6
    Age of your Mac: 2 Weeks
     
  5. tigres thread starter macrumors 68040

    tigres

    Joined:
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    #5
    How long does your battery last iPhonePhan?

    Have you tested your battery with just surfing, and 50% display brightness to see if you can accomplish the 4-5 hours Apple says. I cannot get more than 2.5.

    Am I missing something here?
     
  6. Cynicalone macrumors 68040

    Cynicalone

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    Okie land
    #6
    Here is mine. Interesting that it says my battery is 6 weeks old. I bought my Air on November 4th.
     

    Attached Files:

  7. McGilli macrumors 6502

    Joined:
    Nov 11, 2008
    #7
    Current Battery Capacity: 4872 mAh
    Original Battery Capacity: 5090 mAh
    95%
    Battery-Loadcycles: 3
    Age of your Mac: 2 Weeks
     
  8. tigres thread starter macrumors 68040

    tigres

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    #8

    Looks like we all have around the same results. Why do we not have 100% life on a brand new machine?

    WTH:eek:
     
  9. zer0tails macrumors 65816

    zer0tails

    Joined:
    Mar 23, 2008
    Location:
    Canada
    #9
    Current Battery Capacity: 4775 mAh
    Original Battery Capacity: 5090 mAh
    93%
    Battery-Loadcycles: 3
    Age of your Mac: 6 Weeks
     
  10. tigres thread starter macrumors 68040

    tigres

    Joined:
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    #10
    Why are these capacities lower by 200-400 mAh as opposed to their initial build capacity?

    Anyone care to enlighten us.
     
  11. sherthang macrumors newbie

    Joined:
    Jul 1, 2007
    #11
    Responses from apple?

    As I posted in another thread in this forum I was having terrible battery life as well with specs similar to those stated and a loss of 20% during overnight sleep. I did call apple and like others was referred to their battery savings tips. Unfortunately, no luck. I ended up returning the computer yesterday. Very unfortunate because otherwise I though it one of the best laptops I have owned from apple (screen, design, etc...you all have one, so you know the joys :) )
     
  12. Mactagonist macrumors 6502a

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    Feb 5, 2008
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    NYC - Manhattan
    #12
    My Rev A

    4748/5090 mAh capacity

    93 loadcycles

    9 months old.

    So anyone who has it that bad right out of the box should really by pissed! :)
     
  13. iPhonePhan macrumors regular

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    #13
    I have yet to do such since I use my screen at full brightness even on battery power. I've gotten about 2.5h battery life with full brightness and standard web surfing, VPN, full keyboard lights on, and some iChat web video conferencing with folks across the pond ;)

    I'm guessing if I try to be power conscious I could make it last alot longer but then again, that would defeat the purpose of my using my portable ;) I care to think that if I need power, I can simple walk over and charge it up again (albeit it would take 8 years to fully charge, j/k ;)
     
  14. ntrigue macrumors 68040

    ntrigue

    Joined:
    Jul 30, 2007
    #14
    Something's fishy...

    My Rev A

    Current Battery Capacity: 4862 mAh
    Original Battery Capacity: 5090 mAh
    95%
    Battery-Loadcycles: 66
    Age of your Mac: 6 Months

    Have you used System Profiler to verify? Could be something to do with the 10.5.5 build on Rev B.
     
  15. tigres thread starter macrumors 68040

    tigres

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    #15
    Yeah,

    System Profiler verifies the data. I am thinking my battery is crap, and I have news, if this is accurate... they can take this piece of 2500.00 right back.
     
  16. stealthman1 macrumors regular

    Joined:
    Oct 20, 2006
    Location:
    Ca
    #16
    They didn't build scientifically precise measuring instruments into your MBA?
    From the Apple website..."The battery has an internal microprocessor that provides an estimate of the amount of energy in the battery as it charges and discharges. The battery needs to be recalibrated from time to time to keep the onscreen battery time and percent display accurate." Apple routinely releases software tweaks to address battery charging issues. Hope this helps...I also noticed when I got my MBA that Bluetooth was on by default. Make sure you turn it off for better battery life.
    Calibrating your MBA battery can be found here...
    http://support.apple.com/kb/HT1490
     
  17. mmacnama macrumors newbie

    Joined:
    Jun 30, 2008
    #17
    current battery charge: 4891mAh
    maximum battery charge: 4902mAh
    99%

    current battery capacity: 4902mAh
    original battery capacity: 5090mAh
    96%

    additional info
    battery-loadcycles: 128
    age of your mac: 8 months

    reasonably happy with that.
     
  18. NC MacGuy macrumors 603

    NC MacGuy

    Joined:
    Feb 9, 2005
    Location:
    The good side of the grass.
    #18
    Gen. 2, 4880 mAh at 22 cycles. 95-96% iStat health.
     
  19. Cynicalone macrumors 68040

    Cynicalone

    Joined:
    Jul 9, 2008
    Location:
    Okie land
    #19
    I calibrate all my laptop batteries. I have been doing it for years now, and it does help if you do this once a month as Apple recommends.

    Hopefully with the next Macbook Air we'll get a user replaceable battery.
     

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