2217 Views 5 Replies Latest reply: Apr 11, 2011 8:12 PM by kostby
Welcome to Apple Discussions.
First, calibrate the battery:
Then, reset the SMC:
From the low cycle count, it appears that you have kept it plugged in most of the time. For optimum battery performance, the battery should be discharged periodically and then recharged.
There is a lot of basic information on batteries including an iCal reminder available here: http://www.apple.com/batteries/
The "% charge" or "runtime remaining" indicators in the menubar vary with system load, and are not always the best indicators of overall battery health.
Specifics for notebook batteries: http://www.apple.com/batteries/notebooks.html
Lithium ion batteries require multiple charge/discharge cycles to get the maximum capacity of your battery when it is new.
You need to discharge the battery fully at least monthly, calibrate occasionally (especially if the computer quits unexpectedly while running on batteries), and reset the SMC occasionally.
And, if the battery is more than 3 years old, you're probably due for a new battery anyway.
Have you tried running the full Apple Diagnostics from the discs that came with your computer?
This might uncover a problem with the logic board.
I'd say the next step would be an Apple Store or authorized service provider.
There is likely some problem or combination of problems with
1) the battery - bad cell or connector
2) battery connector inside the computer
3) charging circuitry inside the computer
4) the external power supply or MagSafe connector