Charging Air with 85W charger?

Discussion in 'MacBook Air' started by rk25123, Jan 17, 2013.

  1. macrumors regular

    Joined:
    Aug 17, 2010
    #1
    My Air's charger works only when it wants to and totally randomly, and since it's out of warranty I have to buy a new one. I read somewhere that Mac chargers auto-detect which laptop model you're connecting and regulate the Watts accordingly, so I was wondering, since they all cost the same, if it was better to get the 85W charger instead of the 45W that comes with the Air. Are there any downsides? Is it bigger?

    Thanks for the help!
     
  2. macrumors 601

    Joined:
    Aug 27, 2012
    #2

    It's bigger and heavier. I use one at home, where it's permanently plugged in but I have my standard 45w for the road.

    Psssh... U may want to clean the MagSafe with an air can. It may do magic.
     
  3. thread starter macrumors regular

    Joined:
    Aug 17, 2010
    #3
    Thanks for the tip, but unfortunately I already tried with not luck. It's strange, sometimes it works right away, sometimes it will start charging after an hour it's been plugged and sometimes won't charge at all... I even had it tested at an Apple store and it resulted OK...
    Is the 85W much bigger and heavier? On the Apple site there are no specifics...
     
  4. macrumors Westmere

    GGJstudios

    Joined:
    May 16, 2008
    #4
    There is no harm in using a more powerful MagSafe adapter.

    Intel-Based Apple notebooks: Identifying the right power adapter and power cord
    The link below should answer most, if not all, of your battery/charging questions. If you haven't already done so, I highly recommend you take the time to read it.
    They're the same size.
     
  5. thread starter macrumors regular

    Joined:
    Aug 17, 2010
    #5
    Thank you! Your answer couldn't possibly be more complete! Just one thing: are you sure they're the same size? I thought so judging from the photos on the Apple store, but I found discording statements on the web. What about the weight?
     
  6. macrumors 68030

    Joined:
    Oct 21, 2012
    #6
  7. GGJstudios, Jan 17, 2013
    Last edited: Jan 17, 2013

    macrumors Westmere

    GGJstudios

    Joined:
    May 16, 2008
    #7
    Yes, they're basically the same size and weight. If there's any small difference in weight or size, you wouldn't be able to discern it.
    Not true:

    85w Dimensions: 7.3 x 6.1 x 2.5 inches
    45w Dimensions: 7.3 x 6.1 x 2.3 inches
     
  8. thread starter macrumors regular

    Joined:
    Aug 17, 2010
    #8
    Good, so the only logical thing to do is to get the 85W!
    Thank you for the help!
     
  9. macrumors Westmere

    GGJstudios

    Joined:
    May 16, 2008
    #9
    If you only plan to use it with your MBA, it's better to get the adapter that's designed for it. While it's not harmful to use a higher wattage adapter, it's recommended to use the one that's made for your model.

     
  10. macrumors 68040

    Joined:
    Dec 17, 2009
    #10
    That's the size of the boxes....

    I can tell you that my 85 Watt for my 2011 Macbook Pro is much larger than the one for my 2011 Macbook Air. The 85 watt adapter is at least twice as large.
     
  11. macrumors Westmere

    GGJstudios

    Joined:
    May 16, 2008
    #11
    You're right, I got the box size instead of the adapter size, but I don't recall there being any noticeable size difference.

    My 85w is roughly 3⅛"x3⅛"x1⅛"
     
  12. macrumors 68030

    Joined:
    Oct 21, 2012
    #12
    Those are the box dimensions. Your magsafe adapter is not 7 inches long! :D

    The 45w is 2.5" x 2.5" x 1.25", and is 190g including the duck head.
    The 85w is 3.25" x 3.25" x 1.25" and is 300g including the duck head.

    30% bigger, 58% heavier. If you have no real reason to buy the 85 - get the 45. It's a noticeable difference (1/4 lb) and its more expensive.
     
  13. macrumors 6502a

    marioman38

    Joined:
    Aug 8, 2006
    Location:
    Seattle.Wa
    #13
    My brother has a 15" 2011 MBP, and his charger is MUCH bigger and heavier than my 2011 MBA
     
  14. macrumors 601

    Joined:
    Aug 27, 2012
    #14
    "Size" is so subjective. :). But there ain't no way am lugging an 85w with me when I knows the smaller plug exists.

    But back to ur REAL prob. I would pursue that connector throughly. Not making good contact am thinking.
     
  15. macrumors 6502a

    ybz90

    Joined:
    Jul 10, 2009
    #15
    They're very different in weight, and somewhat in size, but neither are what I'd consider even remotely heavy. In fact, the 85W is more like normal, and the 45W borders on absurdly small.

    ----------

    Percentage-wise it seems big, but in absolute terms, it's a fairly small difference. Both are pretty tiny adapters. But I agree, don't get the 85W if you don't need to, even if on the basis of price alone.
     
  16. macrumors 601

    Joined:
    Aug 27, 2012
    #16
    The ridiculous one is the iPhone's. Is so small at first glance u wonder if they didn't make a mistake.
     
  17. macrumors regular

    Joined:
    Apr 23, 2010
    #17
    We have 13-MBP, 15-MBP, and 13-MBAs at our house. The chargers for the MBAs are easily discernible from the MBP15 -- somewhat smaller in the former case. Not a real big deal, but the MBA chargers could easily slip into a padded sleeve next to the MBA, while the larger one may not be as food of a travelling companion.

    They work well, though. So much so that my daughter took the "wrong" one with her to school. As she said, it charges the Air much faster.
     
  18. hfg
    macrumors 68030

    hfg

    Joined:
    Dec 1, 2006
    Location:
    Cedar Rapids, IA. USA
    #18
  19. macrumors 68030

    Joined:
    Feb 13, 2012
    Location:
    Perth, Western Australia
    #19
    No they aren't.

    I've had both 85w and the smaller 45w MBA 11" charger in the house and they are most certainly NOT the same size. They're similar size, but compare side by side, and they just aren't.


    The 85w charger will work fine however and it will charge your machine quicker. It is safe though as the charger will regulate it's output to prevent damaging your battery.
     
  20. macrumors regular

    Joined:
    Jan 10, 2009
    #20
    I work at a local computer repair shop. We got a free 85W Mag Safe and I have been using it for over a Year. Have not had any problems. I even asked apple just to be on the safe side and make sure not warranty would be void or anything. They said the charger will automatically change to the lower Watts when I connect the air. I use a 2011 MacBook Air.
     
  21. thread starter macrumors regular

    Joined:
    Aug 17, 2010
    #21
    Thank you all for the infos/suggestions!
    I'll try again to clean the connector, but I haven't got much hope...
    I thing I'll go for the 45W (79€/105$, urgh!), less compatible but much nicer for traveling!
     
  22. hfg
    macrumors 68030

    hfg

    Joined:
    Dec 1, 2006
    Location:
    Cedar Rapids, IA. USA
    #22
    Be sure to clean both sides (cable and computer) of the power connector :D
     
  23. macrumors 6502

    Joined:
    Nov 27, 2011
    Location:
    Long Island/North Jersey
    #23
    http://www.amazon.com/gp/aw/d/B001VAAJ5E/ref=mp_s_a_1?qid=1358530134&sr=8-1&pi=SL75
     
  24. thread starter macrumors regular

    Joined:
    Aug 17, 2010
    #24
    That would be a great deal, but unfortunately they won't ship to Italy!
     
  25. macrumors 6502a

    Joined:
    Mar 21, 2010
    #25
    I've got several MBP/MBA models that I use at work, so I just leave a 85W magsafe 1 version permanently plugged into my workspace and use a magsafe 2 adapter for my air. It's great having the flexibility that that adapter provides.

    I've also got the same one plugged into a bedside stand at home. No need to worry about which macbook I have, they all work with the adapter.
     

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