Charger for MB/MBP

Discussion in 'MacBook Pro' started by TimJim, Jul 6, 2007.

  1. TimJim macrumors 6502a

    Joined:
    May 15, 2007
    #1
    with the chargers for the MBP, they are bigger, and the MB chargers are smaller. I was wondering could you use a MBP charger for the MB or would it damage it or charge it faster. Also could you use a MB charger for a MBP, would it just charge slower? Anyone know?
     
  2. kolax macrumors G3

    Joined:
    Mar 20, 2007
    #2
    MBP charger is a higher wattage rating so could damage the MB's battery.

    I wouldn't recommend it.
     
  3. heySparky macrumors regular

    heySparky

    Joined:
    Mar 8, 2007
    Location:
    Oregon
    #3
    That is ridiculous. Just because the MBP charger can supply slightly more wattage, it doesn't mean that it will damage the battery in the MB. The MBP charger can be used safely with either the MBP or the MB.

    Using a MB charger with a MBP will work, but the battery will charge more slowly while the MBP is in use.
     
  4. dusanv macrumors 6502

    Joined:
    Mar 1, 2006
    #4
    MBP charger on MB is OK but I wouldn't do it the other way around.
     
  5. killerrobot macrumors 68020

    killerrobot

    Joined:
    Jun 7, 2007
    Location:
    127.0.0.1
    #5
    My friend's MB charger went bust and was waiting for a new one and she borrowed my MBP charger. It worked fine for her.

    I think going the other way around would never give enough juice to fully charge the battery but I don't think it would harm anything.
     
  6. arcobb macrumors regular

    Joined:
    Feb 3, 2005
    Location:
    Colorado
    #6
    If you take your MB into an Apple store for a visit with a genius ... they'll plug a MB into a MBP charger ... so I'm guessing its quite ok. Cheers!
     
  7. kolax macrumors G3

    Joined:
    Mar 20, 2007
    #7
    I said "could" not "will". Using the word "could" leaves it open to discussion for other people to comment - so quote me right please.

    I'm not an electrical expert and I'm open to take other points on board. So could you explain to me why using a higher wattage power source wouldn't damage something that requires 20 watts less?
     
  8. killerrobot macrumors 68020

    killerrobot

    Joined:
    Jun 7, 2007
    Location:
    127.0.0.1
    #8
    I'm butting in I know, but just because it's rated at a higher wattage doesn't mean it's always running at full wattage. It's just rated up to that amount. So if you only need 20 less, that's all it will pull. But if you needed 20 more over its rate, you'd never get it because it couldn't pull more.

    Not an expert either but I think that's how it works.
     
  9. kolax macrumors G3

    Joined:
    Mar 20, 2007
    #9
    Ah makes sense now, thanks.

    An explanation was all I needed ;)
     
  10. jsw Moderator emeritus

    jsw

    Joined:
    Mar 16, 2004
    Location:
    Andover, MA
    #10
    To confirm: I explicitly asked this question of 2 geniuses, and the MBP charger can be used on both. They didn't recommend the MB charger for the MBP, but I think it's just because it can't charge it fully while it's being used. I don't think it'd hurt it, and works fine if the MBP is asleep and/or not drawing too much power.
     
  11. heySparky macrumors regular

    heySparky

    Joined:
    Mar 8, 2007
    Location:
    Oregon
    #11
    I apologize. I don't mean for my comment to be reflection on you personally.

    Watts is a rating of how much power a charger can supply. How much power a charger actually supplies will depend on what the load is. That means that the charger will only supply as much power as the battery and/or the notebook will draw. Both chargers supply the same voltage to the battery, but the higher wattage charger can supply the power at a slightly higher rate. A MBP uses electricity at a slightly higher rate than the MB, so it needs a slightly more powerful charger.

    I'm sure that explanation isn't very clear, but I'm just an electrician, not a journalist. :)
     

Share This Page