Battery Life Stuck at 95%....why?

Discussion in 'MacBook Pro' started by shuweiyu16, Jun 8, 2007.

  1. shuweiyu16 macrumors member

    Joined:
    Mar 21, 2007
    #1
    I am wondering why my battery life is stuck at 95%....keep in mind my power cord is attached 99% of the time.
    Any input is appreciated.
     
  2. Nermal Moderator

    Nermal

    Staff Member

    Joined:
    Dec 7, 2002
    Location:
    New Zealand
    #2
    Every 3 months you should calibrate your battery. Charge it until the light goes green, unplug it, then use the system until it goes to sleep. Wait until it shuts right off (takes a few hours so I recommend timing it for when you're in bed) then plug it back in and charge it up to full in one go.

    Doing that will keep the battery "healthy" and make it retain more charge.
     
  3. mad jew Moderator emeritus

    mad jew

    Joined:
    Apr 3, 2004
    Location:
    Adelaide, Australia
    #3
    To prevent constant charging and discharging of your battery, the adaptor stops charging at 100% and doesn't resume until 95%. After a while you should notice it start to charge back up again. It's perfectly normal to have your machine plugged in and showing anywhere between 95% and 100%. :)
     
  4. capoditutti macrumors 6502

    capoditutti

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    Nov 11, 2006
    Location:
    Cambridge
    #4
    Wait, are you talking about battery health or battery capacity, because you've just got the two answers here but they sorta answer slightly different questions...
     
  5. Mitthrawnuruodo Moderator emeritus

    Mitthrawnuruodo

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    Mar 10, 2004
    Location:
    Bergen, Norway
    #5
    Those are so interconnected that it's the same thing, really... ;)
     
  6. khunsanook macrumors 6502

    khunsanook

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    Jul 2, 2006
    Location:
    East Asia
    #6
    Neither battery health nor battery capacity...OP was battery life meaning percentage of battery capacity that is currently available for discharging. :)
     
  7. mad jew Moderator emeritus

    mad jew

    Joined:
    Apr 3, 2004
    Location:
    Adelaide, Australia
    #7
    Well, battery life could also be in reference to how long the battery will last before it needs replacement, but that's an entirely different kettle of fish.


    [​IMG]


    See?
     
  8. capoditutti macrumors 6502

    capoditutti

    Joined:
    Nov 11, 2006
    Location:
    Cambridge
    #8
    Y'all jes like it when thangs stay complicayted!!!

    Battery Health surely is the condition of the battery's charge-holding ability relative to when it was new, where as Battery Charge is simply how much juice is in there relative to it being 'full'...?
     
  9. janey macrumors 603

    janey

    Joined:
    Dec 20, 2002
    Location:
    sunny los angeles
    #9
    okay screw the technicalities.

    basically, if the battery is at 95-100%, the adapter and laptop will not charge any more. this is to make the battery last longer in the long run.
     
  10. rrijkers macrumors 6502

    rrijkers

    Joined:
    Jun 6, 2007
    Location:
    The Netherlands
    #10
    So, this means it is no problem when I am having it pluged into the charger all the time and it stays stuck at 99% full? (the green light on the cord/plug is on)

    It actually means it's a good thing I understand?
     
  11. mad jew Moderator emeritus

    mad jew

    Joined:
    Apr 3, 2004
    Location:
    Adelaide, Australia
    #11
    Yeah, that's normal. If it drops to 92% and is still not charging, then you have a problem. For PPC laptops that figure is 94%. :)
     
  12. odinsride macrumors 65816

    odinsride

    Joined:
    Apr 11, 2007
    #12
    I was just wondering about this as well and found this thread. Thanks.
     

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