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Within the last few months computer has been dying at 40+%

After dying the computer will show the low battery icon on the screen, but once charger is plugged in it shows the battery has well over the % at which the laptop should be shutting off.

This usually happens after a restart or opening the computer. It will turn on, I sign in then it dies shortly thereafter.

Any thoughts? From what I have read battery re-calibration should not be needed on this particular model. Have read some bits about it being possible software issues but not sure the real cause.

marked as duplicate by Allan, bmike macbook Oct 31 '16 at 0:48

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  • How many cycles does the battery have? (About this Mac -> more information -> battery) – NoahL Oct 30 '16 at 22:12
  • I flagged as a dupe because while there are very minor differences between the two models of MacBook Pro, the symptoms and answer are identical. – Allan Oct 30 '16 at 22:59

Sure. The battery has a bad cell. Have it replaced.


Marc Wilson may be correct, but another thing to try since it's quick to do is to reset the SMC.

Since your MacBook Pro has a built-in battery, here’s what you do:

  1. Shut down your computer
  2. Keep the MagSafe adapter (or power cable) plugged in.
  3. Press at the same time shiftoptioncontrol (on the left side of the keyboard) and the power button
  4. Let go
  5. Turn your computer back on with the power button.

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