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TS1909: Mac notebooks: Battery may not show a full charge in Mac OS X

Learn about Mac notebooks: Battery may not show a full charge in Mac OS X

TS1909 Why not just make it say 100%

189 Views 2 Replies Latest reply: Dec 6, 2012 3:16 PM by John Galt RSS
spinalshift Calculating status...
Currently Being Moderated
Dec 6, 2012 2:58 PM

When its at 100% of what the adapter will provide, why not just have the computer show at 100% battery life?

MacBook Pro, OS X Mountain Lion (10.8.2)
  • ds store Level 7 Level 7 (30,305 points)
    Currently Being Moderated
    Dec 6, 2012 3:06 PM (in response to spinalshift)

    Because it's not a exact science.

     

    Finally mine got to 100% today, after being anywhere from 95-98-99% and on power for the last several weeks.

     

    I don't mind it none, neither should you.

  • John Galt Level 7 Level 7 (33,025 points)
    Currently Being Moderated
    Dec 6, 2012 3:16 PM (in response to spinalshift)

    spinalshift wrote:

     

    When its at 100% of what the adapter will provide, why not just have the computer show at 100% battery life?

     

    It is not an indication of what the adapter will provide.

     

    Screen Shot 2012-12-06 at 6.12.51 PM.png

     

    When your battery is charged to 100% it will show 100%. If it is charged to 99% it shows 99%. Etc.

     

    ... The battery may appear to stop charging between 93 percent and 99 percent.

    Note: PowerPC-based computers may stop charging between 95 and 99 percent; Intel-based computers may stop charging between 93 and 99 percent.

    Resolution

    This is normal. The batteries used in these computers are designed to avoid short discharge/charge cycles in order to prolong the overall life of the battery.

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