Mac OS X 10.2: Erroneous "You are now running on reserve battery power" Alert

You may see an alert box with a message that says: "You are now running on reserve battery power," even if the battery still has an ample charge.
Symptom

You see an alert box with a message that says "You are now running on reserve battery power," but your battery still has ample charge. This usually happens when waking from an extended period of sleep, or after unplugging the AC adapter.


Solution

Update to Mac OS X 10.2.4 or later.
Published Date: Oct 10, 2016