I recently purchased a 2001 Z8. It currently has 175 miles on it. I went to start it the other day and the battery was dead. I called the dealer and was told that "this is a normal occurance for this car if you don't start or drive it regularly". I hadn't started it in about a week. They said that the computers on the car are a constant drain on the battery, They then sold me an auto shut-off charger. Has anyone else heard of or experienced this problem??