MacBook Air Initial Charge

Discussion in 'MacBook Air' started by alansmallen, Oct 18, 2009.

  1. alansmallen macrumors 6502a

    Joined:
    Jun 25, 2007
    #1
    Hey guys. I got a MacBook Air yesterday and immediately put it to charge. It came with 0 percent battery and took about 6 hours to charge. I then used it to about half capacity and am charging it now. It's also saying it's gonna take 7 or so hours. Is this normal?
     
  2. Gadgetman99 macrumors regular

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    Sep 1, 2009
    #2
    I woud say it is. The MBA charger is only 45 watt, so it takes quite awhile to charge. Once you have discharged and charged it a few times, it will develop it's normal battery life.
     
  3. alansmallen thread starter macrumors 6502a

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    #3
    And another question, can I use my MacBook Pro charger on the Air?
     
  4. Gadgetman99 macrumors regular

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    Sep 1, 2009
    #4
    Some do, and some say it makes the battery "swell". Seems kinda strange to me, but I guess anything is possible. I don't think I would because the voltage is significantly different (2-3 volts I believe?).
     
  5. alansmallen thread starter macrumors 6502a

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    Jun 25, 2007
    #5
    But I once heard that the 85w MBP charger "downscales" itself. Didn't know if that was true or not
     
  6. ayeying macrumors 601

    ayeying

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    Location:
    Yay Area, CA
    #6
    The system will only charge as fast as it can. Do a SMC reset and charge it.
     
  7. alansmallen thread starter macrumors 6502a

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    Jun 25, 2007
    #7
    Just did that. No luck.

    40 percent battery and it says 3:02 for charging.
     
  8. Gadgetman99 macrumors regular

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    Sep 1, 2009
    #8
    I believe the downscaling you are speaking of is the wattage.
     
  9. alansmallen thread starter macrumors 6502a

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    Jun 25, 2007
    #9
    Yep. I'm just really worried about the fact that my MBA takes 6 hours to fully charge.
     
  10. ayeying macrumors 601

    ayeying

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    #10
    Have you tried timing it instead of using the OSX read? It can be somewhat inaccurate sometimes.
     
  11. alansmallen thread starter macrumors 6502a

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    #11
    Yep. Last charge took just over 6 hours and this one is on turn to take about the same.
     
  12. ayeying macrumors 601

    ayeying

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    #12
    What Rev is your air? The only thing I can think of is that my old Rev A had this type of charge for the first 100 or so cycles, then it got faster on charging. I noticed the same effect on my current Rev C that I bought 4 months ago, I'm at 311 cycles and I recharge within 2 hours from 0 to 100% now when it usually took about 3-4 hours before.
     
  13. tsubikiddo macrumors regular

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    Mar 15, 2008
    Location:
    Melbourne, AUS
    #13
    wooo... that's a little bit lengthy
    I remember that my initial charge took about the same time,
    though I was too excited to wait till the machine is fully charged and start using (i.e. playing) around with it

    from the next charge onward till now, it's mostly 1hr to 80%, and another 1-2hrs for the final 20%.

    have you called the apple hotline or bring it in and talk to the Genius ?
     
  14. alansmallen thread starter macrumors 6502a

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    Jun 25, 2007
    #14
    It's a rev b
    I'm playing with it at the same time also. Hpefully that's the issue
     
  15. tsubikiddo macrumors regular

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    Mar 15, 2008
    Location:
    Melbourne, AUS
    #15
    IF I were you, I would never hold myself back from bringing the MBA back into the Apple Store and have a few chit-chats with the Genuis
    after all, you jsut got it yesterday, this is the golden prime time to get everything right and all the minor glitches and issues out of the window before more bugs kick in and your consumer protection power starts fading away

    just my 2cents,
    you paid the full price,
    you deserve nothing less than the full performance and user experience
    (whoops, that includes the fixing and warranty part as well:p)
     
  16. alansmallen thread starter macrumors 6502a

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    Jun 25, 2007
    #16
    A) I bought it used but sealed so I can't return it
    B) It's still covered under warranty

    I'm going into the Apple store tomorrow to pick up a repair so I'll ask.
     
  17. Scottsdale macrumors 601

    Scottsdale

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    Sep 19, 2008
    Location:
    U.S.A.
    #17
    A brand new MBA takes some time to charge. Within a few weeks, it goes down to around three hours or so. I would advise you NOT to use an MBP charger. It could make the battery swell. In addition, it does NOT charge any faster from my own experiments of charging an MBA.

    Enjoy your new MBA.
     
  18. alansmallen thread starter macrumors 6502a

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    Jun 25, 2007
    #18
    Some? 6 hours seems like a lot. I've never had a brand new computer take THAT long.
     
  19. ayeying macrumors 601

    ayeying

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    #19
    Here's a screenshot of my battery charging, starting at 16% and time remaining reported by the OS. I think your 6 Hours could be a little long compared to mine... If I were you, I'd try charging/recharging a few times, after maybe like the 15-20 cycles it still doesn't improve, then I'd head over to Apple.
     

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  20. fluffyx macrumors 6502

    Joined:
    Oct 25, 2007
    #20
    MacBook Airs take FOREVER to charge. You're not alone.

    And it is 100% fine to use a MacBook or MacBook Pro adapter to charge a MacBook Air. It will NOT cause any damage.
     

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