Questions about the in-built battery

Discussion in 'MacBook Pro' started by dead goon, Jul 17, 2009.

  1. dead goon macrumors member

    Joined:
    Jun 24, 2009
    Location:
    Melbourne, Australia
    #1
    Hi all
    Just bought a MBP 2.66ghz, at the moment its charging and I was wonder what the best way to care of the battery is.

    Some say if you leave the power plugged in all the time it drains the life of the battery, so when you use it away from the mains it dies within 30 minutes or so.

    What have others done? Especially for the first time. I plan to leave it on charge now until the light goes from 'amber' to 'green' (hard to tell with my colourblind eyes) and then once OS X is set up, i will unplug it and drain it all the way down.
     
  2. ViciousShadow21 macrumors 68020

    ViciousShadow21

    Joined:
    Mar 11, 2009
    Location:
    To your left or right
    #2
    you dont have to calibrate it the first time just once every couple of months. as far as care, it's just like a removable battery. every couple of days drain it to 35-40% and bring it back.
     
  3. upinflames900 macrumors 6502a

    upinflames900

    Joined:
    May 20, 2009
    #3
    Check apple.com for more information on battery usage. You shouldn't leave it plugged in all the time though. Drain the battery at least once a month.
     
  4. NewMacbookPlz macrumors 68040

    NewMacbookPlz

    Joined:
    Sep 28, 2008
    #4
    http://www.apple.com/batteries/notebooks.html

    You can tell when it's charged by the lights on the side as well instead of the MagSafe adapter. When all the lights are lit or don't blink up when you press the button, it's charged up.
     
  5. DewGuy1999 macrumors 68040

    DewGuy1999

    Joined:
    Jan 25, 2009
    #5
    :apple: Apple - Batteries - Notebooks
     
  6. MacMur macrumors regular

    Joined:
    Feb 24, 2008
    Location:
    California
    #6
    By the way. I just got my 13" Pro a couple of days ago. Last night I used it, on battery, for about 3 hours, surfing the web but pretty much nothing else at the same time. I had the screen set at about 50%. I shut it down and forgot what the battery gauge said. Today I fired it up and was on the web for about an hour, my battery gauge said 6 hours. Boy do I hope that it keeps working like this. My 13" uni Macbook would only give me between 3 and 4 hours with the same settings. Pumped but cautious.:cool:

    Update: I used it an additional 3 hours this afternoon for a total of 4 hours today and it still says 5:00 left. I know there will be another shoe that will fall but in the meantime I remain very excited
     
  7. dead goon thread starter macrumors member

    Joined:
    Jun 24, 2009
    Location:
    Melbourne, Australia
    #7
    Thanks for the link above.

    So what about someone who uses it mainly at home, how do I go about using it with or without the power connected.

    Say if I go to work, and leave the laptop at home I would probably keep it unplugged, then plug it in when I use it? or just use it unplugged until it's empty, charge and use it at the same time?

    My old XP laptop was always plugged in, and thats how I used it all the time.

    Damn, I never thought batteries could be such an issue.
     
  8. upinflames900 macrumors 6502a

    upinflames900

    Joined:
    May 20, 2009
    #8
    You probably want to drain the battery some times so leave it unplugged until it is empty unless you need to charge it for something. At least empty it once a month.
     
  9. m85476585 macrumors 65816

    Joined:
    Feb 26, 2008
    #9
    I think my first battery died from being plugged in too much, and because it was made by Sony. In my opinion, you should use the laptop on battery power at least once a week, discharging it to around 50% or lower. Draining it all the way down is not necessary except maybe every month or two to calibrate it.
     
  10. macjiro macrumors member

    Joined:
    Apr 14, 2008
    #10
    I am looking at a 17" MBP with built-in battery.
    It says it will charge up to 1000 times. I know this has been
    asked before...so the battery will die out near 1000 usage.
    Is this covered by AppleCare? Is there a replacement option or
    do they force you to buy a new machine?
     
  11. AppleNewton macrumors 68000

    AppleNewton

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    Apr 3, 2007
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    #11
    That just means by the 1000th cycle the battery will not hold a 100% charge, so it will drop below that.
    So it may stop fully charging at 95% or 92% etc etc
    Sort of what theyre getting at

    You can get a new battery for $179 after warranty
    it depends as long as its not over cycled and there is noticeable or significant performance decrease they may cover it under warranty.
     
  12. m85476585 macrumors 65816

    Joined:
    Feb 26, 2008
    #12
    The battery should keep 80% of its capacity by 1000 cycles. Once you cross 1000 cycles, it is no longer covered by Apple Care. It will probably still work after 1000 cycles, but it just won't last as long. If it goes below 80% capacity before 1000 cycles, AppleCare should replace it. You can check the capacity with a program like Coconut Battery (capacity is listed as "health").
     
  13. macjiro macrumors member

    Joined:
    Apr 14, 2008
    #13
    Thanks! Is this a hard battery to replace since its 'built-in'?
    I haven't looked at it yet.
     
  14. AppleNewton macrumors 68000

    AppleNewton

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    #14
    Nope...and Apple does it for you when you purchase it.

    but there are disassembled photos on iFixit.com under Tear Down
     
  15. dead goon thread starter macrumors member

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    Jun 24, 2009
    Location:
    Melbourne, Australia
    #15
    how low do you have to go for it to be counted as a cycle when you recharge?

    I've done 2 cycles so far, drained down to 0% the first time and 28% the next. I think I will leave it plugged in when I use for a while. And unplug it when I go to bed.
     
  16. MacModMachine macrumors 68020

    MacModMachine

    Joined:
    Apr 3, 2009
    Location:
    Canada
    #16
    it does not work like that, once you have used 100% of the battery the cycle is counted like...

    say you use 40% and then recharge it to 100%

    then use it again for 60% on battery...that is 1 cycle count.

    the batteries used in the macbooks use apples own technology to manage the battery cells individually thus more even charging and usage of the cells inside.
     
  17. miles01110 macrumors Core

    miles01110

    Joined:
    Jul 24, 2006
    Location:
    The Ivory Tower (I'm not coming down)
    #18
    No... it means by the 1000th cycle you shouldn't expect more than 80% of the original capacity to remain.
     

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