It would seem the battery on my car will last the maximum of two years. I am on my fourth battery and it has gone flat. OK the car hasn't moved for about 8 weeks due to a personal injury. But I've had this trouble before. The battery flattens for no reason, seemingly after its been left for from a couple of days to a week or so. It also goes flat when only the radio is on while waiting for someone in a car park. I've heard that the bluetooth, handsfree kit, parasitic drain or something else could be to blame. Either way this is not on and any help would be appreciated.