I've been running the 14lb. battery for a while now and if you leave the car for a week without using it the battery will already be weak. If you drive regularly it seems to be fine. I still have the full size battery and I put it in when I don't have a track day looming to keep it charged as a spare. Other than that, that little battery does the job, but don't leave anything on! I really need one of those trickle chargers. The charger I have is cerca 1974 Sears Craftsman.

Les