battery level fluctuates

Discussion in 'MacBook Pro' started by amitface, Jun 25, 2007.

  1. amitface macrumors regular

    Jun 18, 2007
    I got my SR MBP this morning, and I noticed something just now.. the battery level indicator fluctuates. I just charged it up completely, and it said 4:47 to go, then a little bit later, it said 4:31, then 4:58. It did this earlier, so I thought charging the battery might help, but it didn't.

    Will calibration fix this? It's very annoying.
  2. anirban macrumors 6502a


    Jan 9, 2007
    Houston, TX
    I believe that it is just a realtime estimate calculated by the power management system, based on the task that you are performing on the machine.

    For example, if you are playing iTunes with full volume while surfing Safari, it will give you a time, lets say 3hrs. Then you close iTunes, and just use Safari, then the time will be a more- because less battery power is being used.
  3. OutThere macrumors 603


    Dec 19, 2002
    As long as the percentage doesn't fluctuate, there's no problem. The number of minutes remaining is supposed to fluctuate to reflect how long you have left with regard to how you're using your computer. (ie it will go down if you are editing in iMovie, but up if you turn down the brightness and just type in textedit.)

    edit: anirban got there first, doh.
  4. Smoothie macrumors 6502a

    Jun 23, 2007
    I'm guessing here, but the battery life will fluctuate depending upon the activity of the computer at the time. If it's just idling, the remaining life will be longer. So if you just were doing some processor intensive stuff and then let it sit at idle, the remaining battery life will increase.
  5. AceOfBass macrumors member


    May 13, 2007
    yeah mine does that too, but since the % doesn't change I don't worry about it. but mine says like 2:40 something for a while before it goes up to like 4 hrs

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