My mbp is always powered, best battery maintenance?

Discussion in 'MacBook Pro' started by shaktimage, Apr 26, 2011.

  1. shaktimage macrumors member

    Joined:
    Apr 18, 2009
    #1
    Hi, i just bought a new 15" mbp after my 2008 model died (motherboard) I use it 90% of the time with external cinema display 23"(no power plug for mbp) external keyboard, mouse etc,... So because of the external display i have to keep the laptop powered all the time. I have been told it kills the battery. So what to do? Disconnect the laptop and discharge the battery completely once a month? Thank you for your advises!
     
  2. mulo macrumors 68020

    mulo

    Joined:
    Aug 22, 2010
    Location:
    Behind you
    #2
    nah, so long as you keep exercising the battery, ie. draining and charging it often, you will be fine.
     
  3. Treeman574 macrumors regular

    Joined:
    Feb 5, 2011
    Location:
    QLD, Australia
    #3
    It's fine as long as you let it run off the battery once every 2-4 days. With an external monitor plugged in, the battery won't last long anyway.
     
  4. Skika macrumors 68030

    Joined:
    Mar 11, 2009
    #4
  5. CMelton macrumors regular

    CMelton

    Joined:
    Dec 8, 2008
    Location:
    London, UK
    #5
    Maybe he means that it uses extra power to drive a higher resolution external display? Not sure if it does but that is what I took him to mean.
     
  6. mape2k macrumors regular

    Joined:
    Apr 18, 2011
    Location:
    Germany
    #6
    The external display forces the ATI graphic to be enabled all the time, thus draining the battery faster.
     
  7. simsaladimbamba

    Joined:
    Nov 28, 2010
    Location:
    located
    #7
    And then there is this:
     
  8. legreve macrumors regular

    legreve

    Joined:
    Nov 22, 2010
    Location:
    Denmark
    #8
    Once a month wont cut it...

    My girlfriend has a one and half year old laptop that is addicted to the power cable simply because she kept it in all the time to begin with... yes, it will burn down the battery. And this goes for all items. I have an iPod mini that doesn't work anymore because I left it charging too log (yeah... at that time I didnt bother taking it with me, just sat there.)

    So bite the dust and stick to recharging once it's down quite a bit.
     
  9. rmitchell248 macrumors 6502

    Joined:
    Mar 30, 2010
    Location:
    Liebsthal, Germany
    #9
    the responses trying to find out why he has it plugged in are funny. If he is using a display and has the computer closed then he has to run it off the wall plug. It will not operate closed with an external display unless plugged in.
     
  10. himesh macrumors regular

    Joined:
    Dec 7, 2010
    Location:
    Birmingham, England
    #10
    Doesn't the new MBP's automatically switch to the external power source when the battery is fully charged? So not overcharging the battery, well at least mine says it does...
     
  11. GGJstudios macrumors Westmere

    GGJstudios

    Joined:
    May 16, 2008
    #11
    All Mac portables... not just new ones and not just MBPs... stop charging the battery when it's full.
     
  12. steadysignal macrumors 6502a

    steadysignal

    Joined:
    Dec 21, 2010
    #12
    so you can leave it plugged in all the time without issue?
     
  13. ECUpirate44 macrumors 603

    ECUpirate44

    Joined:
    Mar 22, 2010
    Location:
    NC
    #13
    It will degrade the battery health over time. Read the FAQ.
     
  14. GGJstudios macrumors Westmere

    GGJstudios

    Joined:
    May 16, 2008
    #14
    No.
    If you read the Battery FAQ that simsaladimbamba posted in post #7, it really will answer most, if not all, of your battery-related questions:
     
  15. BuckyN8 macrumors newbie

    Joined:
    Mar 23, 2011
  16. tezro macrumors regular

    tezro

    Joined:
    Sep 7, 2007
    #16
    I got my MBP since june 2009 and it's on power most of the time.
    When I travel it's not, obviously, so I drain the battery watching series.

    According to coconut my battery is still at 100% with 132 cycles.
     
  17. adnoh macrumors 6502a

    adnoh

    Joined:
    Nov 14, 2010
  18. shaktimage thread starter macrumors member

    Joined:
    Apr 18, 2009
    #18
    Just got back online... Thanks for all answers. So to reply to the question: why do i always keep the charger connected when i use the computer? Simply because with a external cinema display 23" it will just not work unless the power adapter is plugged. I live part time in India where power failure is very usual, and i had to plug the laptop through the inverter/UPS so juice will be provided during the power failure.
    So no i cannot unplug my computer, this new baby will be connected to power almost all the time. Now i wonder if draining the battery completely one a month (or once a week?) will prevent it from dying too fast
     
  19. shaktimage thread starter macrumors member

    Joined:
    Apr 18, 2009
    #19
    ok, just read Apple notebook FAQ. All is there Thanks so much!
     

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