MacBook Pro turns off at 82% every time

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Level 1

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MacBook Pro turns off at 82% every time

Purchased June 2008. MacBook Pro works fine when plugged in. On battery works fine until 82% when computer shuts off unprompted. Happens every time. Recently reset my hard drive at suggestion of Apple Genius to take care of driver issues. Still have the same problem. Here are specs.

Model Information:
Serial Number: Sony-ASMB012-38b0-628b
Manufacturer: Sony
Device name: ASMB012
Pack Lot Code: 0000
PCB Lot Code: 0000
Firmware Version: 0110
Hardware Revision: 0500
Cell Revision: 0303
Charge Information:
Charge remaining (mAh): 5462
Fully charged: Yes
Charging: No
Full charge capacity (mAh): 5494
Health Information:
Cycle count: 75
Condition: Good
Battery Installed: Yes
Amperage (mA): 0
Voltage (mV): 12410

MacBook Pro 15 in, Mac OS X (10.5.6)

Posted on May 11, 2009 10:27 PM

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Answer 1

iVmichael

Level 6

13,740 points

May 12, 2009 3:23 AM in response to tyduffy

Welcome to Apple Discussions 🙂

Reset the SMC (System Management Controller) and re-calibrate the Battery then see how it behaves, if it still does the same thing then I'd be calling Apple about a replacement.

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Answer 2

May 12, 2009 4:15 AM in response to iVmichael

hmm if you have spare mbp or spare batt, you can interchange and observe

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Answer 3

Allan Jones

Level 9

78,266 points

May 12, 2009 6:58 AM in response to tyduffy

I have a PowerBook G4 whose battery consistently shuts off in the neighborhood of 60 percent, although the overall health and status number are nearly as good as yours. An Apple Genius said that constant shutdowns at or near the same charge level often indicates a failing or failed cell within the battery. They did nothing on that one because the computer was clearly nearly six years old and most batteries don't last that long.

You should still be under warranty--get to an Apple store and let them see the shutdown if the SMC reset does not get you running properly.

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