"Battery running on reserve battery power"

Discussion in 'MacBook Pro' started by Helljumper, Jun 18, 2010.

  1. Helljumper macrumors member

    May 24, 2010
    I just turned on my 13" MBP and got this message. Apparently, this is supposed to come up when there is only like 5% charge left. My battery indicator at the top of the screen said there was 22% charge left. Also, according to IStat, my battery's health has already dropped down to 97% after only about 2 weeks and 5 cycles.

    Is this normal? I'm going to try recallibrating my battery by fully charging it and then letting it fully drain. Is there a good chance that this solves this problem?
  2. dsprimal macrumors 6502a


    Mar 27, 2010
    to the reserve battery. mine is actually running on it now as well and from what i've seen over the past 2 months of owning my mbp, the 20% mark is the time when the reserve battery kicks in.

    as for the battery calibration, i've done it, and my battery health still fluctuates around 95%-97%.

    both your worries are normal.

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