Thanks to all who suggested me contacting Apple about the battery problem. Called and the helper drone spent a very gracious 30 minutes with me. He clearly and competently talked me through a few things to make sure it was really the battery, resetting the battery management system, etc. Then I reproduced the problem and it occured exactly as twice before. He was quiet for a while and I asked: So, what now. He said, "I'm typing up the notes and an order to send you a new battery." Battery should get here in under a week. Paul