Using another Magsafe on MacBook Air

Discussion in 'MacBook Air' started by ryanhawiya, Nov 30, 2008.

  1. ryanhawiya macrumors member


    Aug 1, 2008
    Don't get me wrong, I love my new MacBook Air. The only thing I cannot stand is the charging time. On the go, sometimes I only have a couple hours to get this charged and that's not going to happen.

    So my question is, could I use a regular MacBook 65W charger with this? I know it will not fit well, but I could have it at the edge of a table or something.

    I just don't want it to fry the thing or something horrific. :confused:
  2. NickEm009 macrumors newbie

    Feb 14, 2007
    Macintosh Portable
    You can do it but because of the massive difference of electricity you can only do it for like 10 minutes at a time. I once forgot my MagSafe charger at home for my 15" MBP and the teacher at school had a 17" MBP and I used his for for short bursts of time and it worked and i still have my laptop:)
  3. Cynicalone macrumors 68040


    Jul 9, 2008
    Okie land
    I don't know if that is a good idea. You know how hot it get's when you charge it. I would be worried about the heat that would generate.
  4. ryanhawiya thread starter macrumors member


    Aug 1, 2008
    Ehh, I am not taking my chances. Ha.

    I'm done on my decision. Yeah, even with the 45w that it has, it still gets a little hot. I will just let it take its time than let $2500 burn to ashes.
  5. NC MacGuy macrumors 603

    NC MacGuy

    Feb 9, 2005
    The good side of the grass.
    I've used my MBP charger for months on my first Air without issue. Used a MB too, no problem. Thing still works like a champ.

    Can't work the other way though. The MBP scoffs at the puny output of the Air's magsafe.
  6. hobbbz macrumors 6502a


    Mar 8, 2005
    Higher wattage adapters have no problem with low wattage batteries. The batteries only 'pull' what they need, the power isn't 'pushed' from the power adapter.

    If you try it the other way though, low watt adapter with a high watt battery, the battery will try to pull too many watts and overheat the adapter. Possibly destroying it.

    Oh and to answer your question, the watts don't affect the charge time, it's the amperage.
  7. ryanhawiya thread starter macrumors member


    Aug 1, 2008
  8. stevemoore macrumors newbie

    Nov 3, 2008
    it's all good

    You can mix and match Apple laptops and magsafe adaptors.
    The power supplies are regulated so I don't believe safety is an issue - I think all switched mode power supplies limit their minimum current output too.

    I have charged my MBA with MacBook Pro and MacBook power supplies in the office, and charged new MacBook with MBA power supply.

    Very few people died.

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