Battery power of MBP 2010 17" suddenly dropped from 30-40% to about 15%

Discussion in 'MacBook Pro' started by hajime, Feb 3, 2017.

  1. hajime macrumors 601

    Jul 23, 2007
    It has happened a few times that the battery of my MBP 2010 17" suddenly dropped from about 30-40% to about 15%. Does that mean the battery will die pretty soon? How many more months will it last?
  2. zarathu macrumors regular


    May 14, 2003
  3. ZapNZs macrumors 68020


    Jan 23, 2017
    I agree with Zarathu. Battery meters have certain limitations when it comes to what they tell us.

    Do you know how many cycles are on your current battery?
    Have you seen a drastic change in the length of run time a full charge provides you?
    Have you recently upgraded the operating system?

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