65W Power-Adapter for new PB 12"

Discussion in 'Mac Accessories' started by buddyspencer, Nov 15, 2005.

  1. buddyspencer macrumors regular

    Joined:
    Oct 4, 2005
    Location:
    Germany
    #1
    I have a 45W Power Adapter and also an 65W Power Adapter. I've read a few threads, but don't know what's right?

    Can i use the 65W Power Adapter for my new PB 12" Oct. 2005 Edition? The PB was shipped with a 45W Power Adapter.

    I've heard, that the 65W does charge the Book faster - is that right?

    will there be any problems in using the 65W Adapter for my new PB12"??

    Cheers Buddy
     
  2. grapes911 Moderator emeritus

    grapes911

    Joined:
    Jul 28, 2003
    Location:
    Citizens Bank Park
    #2
    It will work just fine. I don't think it will charge it any faster though.
     
  3. dcv macrumors G3

    Joined:
    May 24, 2005
    #3
    Yes you can use the 65W power adapter for the 12" PowerBook (that's the only one you can buy as a spare). I've also got both... I can't say I've ever bothered to observe charging times though.
     
  4. buddyspencer thread starter macrumors regular

    Joined:
    Oct 4, 2005
    Location:
    Germany
    #4
    Fine - the most important thing for me is that i can use the 65W without damaging my 12" PB
     
  5. dcv macrumors G3

    Joined:
    May 24, 2005
    #5
    I'm assuming that you have bought a new one and you're not using some sort of other 65W adapter. It should look exactly the same as the 45W white brick.

    Part number of mine is M8943B/A (though that might just be the UK model)

    [​IMG]
     
  6. buddyspencer thread starter macrumors regular

    Joined:
    Oct 4, 2005
    Location:
    Germany
    #6

    i bought a new pb 12" with the 45W Adapter. And also have a new 65W Adapter at home - got it from a friend.

    i now compared the 45W with the 65W excatly. the result:

    45W Adapter:Output (24V) and 1.875A

    65W Adapter: Output(24.5V) and 2.65A


    the two adapters have different ampacities and voltings. first i thougth the two adapters only have different watt?!

    does the different values also make no odds?
     
  7. iEdd macrumors 68000

    iEdd

    Joined:
    Aug 8, 2005
    Location:
    Australia
    #7
    Firstly it's amperage. Here's a little electronic theory for you:
    Ohms law states that volts x amps = watts. Volts ÷ resistance = amps. Resistance x amps = volts.
    Generally the voltage isn't that critical. Your powerbook could probably have anywere from 20-30volts running it. The resistance in the circuitry of the adaptor then determines the amps. Amperage times voltage is of course wattage.
    I hope that rambling on made some sense :)
     
  8. buddyspencer thread starter macrumors regular

    Joined:
    Oct 4, 2005
    Location:
    Germany
    #8
    Ok - but what about having problems in using the 65W Adapter?? Can i use it without having problems ?
     
  9. grapes911 Moderator emeritus

    grapes911

    Joined:
    Jul 28, 2003
    Location:
    Citizens Bank Park
    #9
    How many of use have to tell you that you can use it before you believe us? :confused:
     
  10. superbovine macrumors 68030

    superbovine

    Joined:
    Nov 7, 2003
    #10
    You should have gone for the one word answer the first time...

    YES!
     

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