Why can't I use my ACD with my Macbook running off battery?

Discussion in 'Mac Accessories' started by InfiniteLoopy, Dec 16, 2010.

  1. InfiniteLoopy macrumors 6502

    Joined:
    Dec 14, 2010
    #1
    Hi all,

    As soon as I unplug my MacBook's magsafe, the ACD switches off.
    I'm worried that as the battery isn't being used, it may get damaged as I only use the MacBook in this way.

    Does anyone know why I can't use the ACD like this?

    Thanks,
     
  2. simsaladimbamba

    Joined:
    Nov 28, 2010
    Location:
    located
    #2
    It seems, one can't use an external display while running on batter power.
     
  3. InfiniteLoopy thread starter macrumors 6502

    Joined:
    Dec 14, 2010
    #3
    Ah OK. That's strange. Is there a technical reason for it?
    I notice that my battery drops down to 97% and recharges. Does it risk anything if it's never used in another way?
     
  4. GGJstudios macrumors Westmere

    GGJstudios

    Joined:
    May 16, 2008
    #4
    Batteries won't always recharge from 97%. They usually have to drop lower before they recharge.
    This should answer most, if not all, of your battery questions: Apple Notebook Battery FAQ
     
  5. InfiniteLoopy thread starter macrumors 6502

    Joined:
    Dec 14, 2010
    #5
    Thanks.

    Is there a way I can still use the ACD but let the battery be used, as advised in your instructions?
     
  6. GGJstudios macrumors Westmere

    GGJstudios

    Joined:
    May 16, 2008
    #6
    Why don't you want to plug in your Mac while using the ACD?
     
  7. plinden macrumors 68040

    plinden

    Joined:
    Apr 8, 2004
    #7
    I'm currently running a 15" i7 MBP (April 2010) on battery power driving an external monitor (Samsung 24"). Perhaps it depends on the model - I had an earlier MBP that wouldn't.

    I occasionally run the battery down while working to recalibrate it which is why I'm doing it unplugged now.
     
  8. GGJstudios macrumors Westmere

    GGJstudios

    Joined:
    May 16, 2008
    #8
    Are you in clamshell mode, or do you have the MBP lid open?
     
  9. panoz7 macrumors 6502a

    panoz7

    Joined:
    Nov 21, 2005
    Location:
    Raleigh, NC
    #9
    In my experience you can run an external monitor using battery power if the screen is open. If the screen is closed (clamshell mode) then you must be plugged in. No idea why it's like that.
     
  10. simsaladimbamba

    Joined:
    Nov 28, 2010
    Location:
    located
    #10
    Yeah, I remember now. One can't use CLAMSHELL MODE while on battery power, which strange, as powering one display should be less battery consuming than powering two displays.
     
  11. InfiniteLoopy thread starter macrumors 6502

    Joined:
    Dec 14, 2010
    #11
    I didn't want to always plug it in as I thought that wasn't good for the battery (I never really use the Mac other than at my desk, with the ACD).

    Yes, it seems to work with the lid open; seemingly, it's clamshell mode which requires the power ... strange ...
     
  12. GGJstudios macrumors Westmere

    GGJstudios

    Joined:
    May 16, 2008
    #12
    It's OK to run with it plugged in a lot of of the time. Just unplug and run on battery for a few hours every few days, and you'll be fine. Read the FAQ link I posted in post #4 for more details on proper care for your battery.
     
  13. InfiniteLoopy thread starter macrumors 6502

    Joined:
    Dec 14, 2010
    #13
    OK thanks for the advice.
    I'll just open the lid and unplug it to let the battery be used every so often.
     

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