rMBP w/ Mid 2009 Power adapter question

Discussion in 'MacBook Pro' started by jonfarr, Jul 2, 2012.

  1. jonfarr macrumors 6502a

    jonfarr

    Joined:
    Jun 29, 2012
    Location:
    Portland
    #1
    So, I have a mid 2009 MBP 13" power adapter and I got a magsafe adapter for my thunderbolt monitor. I don't remember how many watts the old charger is, but does it have enough with the magsafe adapter to charge my Retina Pro? I would rather not have to buy a new cord if possible.

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    Just found out my old one is 60w with the retinas being 85w.
     
  2. Macman756 macrumors 6502a

    Macman756

    Joined:
    Sep 24, 2008
    Location:
    Atlanta, GA
    #2
    A 13" MBP charger is 60w, retina is 85w. You need to use the 85w. Your retina came with a charger, why not use that one? The cinema display is also 85w.
     
  3. pgiguere1 macrumors 68020

    pgiguere1

    Joined:
    May 28, 2009
    Location:
    Montreal, Canada
    #3
    It will still work but charge slower. If you are doing something intensive like gaming, rendering, transcoding etc. it may not charge at all.
     
  4. jonfarr thread starter macrumors 6502a

    jonfarr

    Joined:
    Jun 29, 2012
    Location:
    Portland
    #4
    Well, I have my extra 60w charger that was for travel. So it sounds like I may need to buy a new 85w Mag2. Oh well. Thank you for the reply!

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    All it will do is charge slow? Will it affect the battery in a negative way at all?
     
  5. MagicBoy macrumors 68040

    MagicBoy

    Joined:
    May 28, 2006
    Location:
    Manchester, UK
    #5
    Yep, and Nope respectively.
     
  6. pgiguere1 macrumors 68020

    pgiguere1

    Joined:
    May 28, 2009
    Location:
    Montreal, Canada
    #6
    I can't tell you how slow exactly but even my MBA 45W charger manages to charge my 15" MBP, but it's like 3x slower. I don't know about a 60W but I assume it's not that bad.
     
  7. jonfarr thread starter macrumors 6502a

    jonfarr

    Joined:
    Jun 29, 2012
    Location:
    Portland
    #7
    Awesome, thank you!
     

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