Why my MacBook Pro 15" (2011) power adapter turns orange? I bought an early-2011 MacBook Pro 15" (highest-spec model) in June. It's running Lion.

I have a problem which happens occasionally. My power adapter (while plugged in) from time to time (particularly when I play games) turns orange and shows me on the bottom of the screen that there is "0:09" or "0:10" minutes left. However, when I push on the battery menu icon for the detailed information, it shows me "99% Full".
It could be that your battery is defective.

If you go to System Information &gt; Power, what do you see under "Battery Information" - "Charge Information"?

Mine says:

Charge Information:
  Charge Remaining (mAh): 4693
  Fully Charged: Yes
  Charging: No
  Full Charge Capacity (mAh): 4744
Health Information:
  Cycle Count: 219
  Condition: Normal