Battery cycle switches over after 85%

Discussion in 'MacBook Pro' started by 251920, Oct 5, 2009.

  1. 251920 macrumors member

    Joined:
    Sep 17, 2008
    #1
    Hi, I noticed that my battery cycle (according to istat) switches over at 15%.
    So as son as it switches over to the next cycle I plug in the adapter to make the battery run a cycle from 100%-0.(I know the cycle in 100%) But it still switches over at 15%, that means that the battery ran only 85% of its capacity.
    How can that be?
    Is it possible to reset(delete) battery cycle data?
     
  2. miles01110 macrumors Core

    miles01110

    Joined:
    Jul 24, 2006
    Location:
    The Ivory Tower (I'm not coming down)
    #2
    A cycle is one full discharge and recharge, but it doesn't have to be continuous. For example,

    100% -> 0 -> 100% = 1 cycle

    85% -> 50% -> 100% -> 35% = 1 cycle

    100% -> 50% -> 100% -> 50% = 1 cycle

    so you were probably caught in the middle of a cycle or something. Does it always change over at 15% ?
     
  3. 251920 thread starter macrumors member

    Joined:
    Sep 17, 2008
    #3
    In changes at 15-13%.
    I know that a cycle is 100%. So I waited for it to switch to the next cycle and I started charging it, so that a full cycle would be froom 100-0.
    But still, it changes at 15-13%.
     

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