Leave the battery with the power adapter?

Discussion in 'MacBook Pro' started by gusious, Sep 1, 2008.

  1. gusious macrumors 65816

    gusious

    Joined:
    Dec 2, 2007
    Location:
    Greece
    #1
    Is it ok to leave the power on on a MBP when you also have it plugged with the adapter?I mean even when the battery is fully charged.

    I have heard that this thing may lower the battery's health.
     
  2. GGJstudios macrumors Westmere

    GGJstudios

    Joined:
    May 16, 2008
    #2
    No, it doesn't hurt the battery at all to leave it plugged in, even when fully charged.
     
  3. monkey86 macrumors 6502

    monkey86

    Joined:
    Aug 5, 2008
    Location:
    London
    #3
    actually you are incorrect.

    leaving the power adapter plugged in will steadily decrease the battery life over time.

    the correct and documented way to maximise your battery life (in any rechargeable) is to fully charge then run the battery down completely then charge again - i have 4.5 hours on an original battery in my PB 12" using this method!

    [​IMG]
     
  4. GGJstudios macrumors Westmere

    GGJstudios

    Joined:
    May 16, 2008
    #4
    You need to get your facts straight before challenging people. It does NOT hurt a battery or decrease its life to operate with the A/C plugged in, even after the battery is fully charged. I did NOT say to leave it plugged in for months like that! As long as the battery is calibrated every month or so, there is no decrease in battery life.
     
  5. gusious thread starter macrumors 65816

    gusious

    Joined:
    Dec 2, 2007
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    Greece
    #5
    Yeah but letting it dry out means that you loose all the thing you've done with your PB right?Also when you charge it, is your PB on and working?Or do you shut it down?
     
  6. monkey86 macrumors 6502

    monkey86

    Joined:
    Aug 5, 2008
    Location:
    London
    #6
    google it my friend :)

    i dont let it completely dry out, i plug it in when the pb prompts to recharge.
     
  7. GGJstudios macrumors Westmere

    GGJstudios

    Joined:
    May 16, 2008
    #7
    From http://www.apple.com/batteries/notebooks.html
    After a battery is fully charged, it will not continue to overcharge if left plugged in. It stops charging when full. I don't think the OP was referring to leaving it plugged in 24/7 all year long.
     
  8. mattyb240 macrumors 6502a

    Joined:
    May 11, 2008
    #8

    Correct my sister has just started at the apple store as a mac speacilist, the geniuses say when it is fully charged it no longer operates on battery power and runs directly off the mains so it no longer tries to over charge the battery.
     
  9. Jonathan_W macrumors member

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    Jan 13, 2008
    Location:
    Newcastle, UK
  10. gusious thread starter macrumors 65816

    gusious

    Joined:
    Dec 2, 2007
    Location:
    Greece
    #10
  11. mattyb240 macrumors 6502a

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    May 11, 2008
    #11
  12. Jonathan_W macrumors member

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    Jan 13, 2008
    Location:
    Newcastle, UK
    #12
    My post wasn't aimed at your post, it was for the original post :p
     
  13. GGJstudios macrumors Westmere

    GGJstudios

    Joined:
    May 16, 2008
    #13
    The OP wasn't talking about running on A/C with the battery out. They were asking about leaving it plugged in with the battery IN.
     
  14. Jonathan_W macrumors member

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    Jan 13, 2008
    Location:
    Newcastle, UK
    #14
    Oops, my mistake :p

    At least the OP learnt a new fact today :p
     

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