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Discussion in 'MacBook Pro' started by heero, Sep 12, 2010.

  1. heero macrumors newbie

    Joined:
    Sep 12, 2010
    #1
    I am shopping for a used 15" pro book. I cant figure out when the new magnetic power cord was introduced, or if I need a 60 or 85w supply and when that transition went into effect. Thanks. I thought all unibodys had the new connection, but apparantly not?
     
  2. mulo macrumors 68020

    mulo

    Joined:
    Aug 22, 2010
    Location:
    Behind you
    #2
    all MBP's have been using the magsafe for a long time. the 15 and 17 inch need the 85 watt
     
  3. GGJstudios macrumors Westmere

    GGJstudios

    Joined:
    May 16, 2008
    #3
    They do.
     
  4. CalBoy macrumors 604

    CalBoy

    Joined:
    May 21, 2007
    #4
    All 13" notebooks (whether macbook or mbp) are 60 watts, and all 15" macbook pros are 85.

    AFAIK all magsafe chargers will work (ie I can use my old one to charge a new mbp), but if you can try to get the new one because it'll be less likely to fray.
     
  5. EricNau Moderator emeritus

    EricNau

    Joined:
    Apr 27, 2005
    Location:
    San Francisco, CA
    #5
    That's correct. The design of the MacSafe connector has not changed; only the cord has been redesigned, and both are cross-compatible.
     
  6. MacModMachine macrumors 68020

    MacModMachine

    Joined:
    Apr 3, 2009
    Location:
    Canada
    #6
    the connector was changed , the socket was not

    the cord is thicker.
     
  7. EricNau Moderator emeritus

    EricNau

    Joined:
    Apr 27, 2005
    Location:
    San Francisco, CA
    #7
    Now we're just getting into semantics, but neither the male nor female end of the connector has been changed. The only noticeable difference is the thickness and right-angle design of the cord.
     
  8. m4rk0 macrumors member

    Joined:
    Dec 28, 2008
    #8
    i was wondering whether i could use my old 85W magsafe adapter to power an i7 15" and i found this thread. :)
    it seems i can as, other than the posts you guys wrote, specs wise they boast the same output power, ie 85W, and share the same output current:

    2009 T magsafe = 18.5V 4.6A / 16.5V 3.6A
    2011 L magsafe = 16.5 ~ 18.5 V / 4.6A max

    the only difference being that, from what stated on the adapters, the old one provides two voltages while the new one has a variable voltage: is it possible?
     
  9. m4rk0 macrumors member

    Joined:
    Dec 28, 2008
    #10
  10. DewGuy1999 macrumors 68040

    DewGuy1999

    Joined:
    Jan 25, 2009
    #11
    Sorry, that wasn't helpful. One thing that page did have was a note about not using previous generation MacBook Air power adapters with the current generation. However there wasn't a similar note for the MacBook/Pro power adapters. From the info you've given I'd say they do the same thing, but I'm not an expert.
     
  11. SavMBP15 macrumors 6502

    Joined:
    Mar 26, 2010
    #12
    Incorrect. The MBP 15-inch, 2.53GHz, Mid 2009, uses the 60W magsafe power adapter. I only know this because I own one and that is also what the apple site that is linked above shows. And FYI it uses the old connection.
     
  12. m4rk0 macrumors member

    Joined:
    Dec 28, 2008
    #13
    no need to be sorry mate! :D:)
    yeah, the only information provided is what-magsafe-shipped-with-which-model; they say new magsafe adapters are compatible backwards* but don't explicitly say the opposite, i guess it's simply to push sales for new adapters. :rolleyes:
    maybe others could chime in, just to know whether there's a variable output voltage or not, making it just a different way of writing technical specs (which i'd say isn't technically written in the correct form).

    * newer adapters should power and charge your MacBook, MacBook Pro, or MacBook Air just like the adapter that originally came with your computer.

    yep, as well as early-2009 15" mbp.
     

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