Thank you Bill B. for input--yes, all trunks, doors etc. closed when ammeter reading noted. Car is stock, no after market electronics noted.
Dirty Tool, thank you as well, battery checked ok today, no bad cells, and now fully charged. Attendant said he had same battery and asked what was the problem. I explanined rarely drove car, and battery dead. He explained he had mercades benz, he rarely drove and had same problem. He said he started it once a week for 20 minutes and now one year later, never has had a dead battery.
Definately will start and run it at least once a week. Will advise of results. Thanks again for your inputs, it has helped me come to this decision.