For the last few months my 13V battery runs flat in 3-10 days of not driving. It's been to the garage and following a day of diagnosis they have no idea what the problem is either. I've been monitoring it for over a month, it doesn't coincide with rainfall, no lights are on, doors are closed properly. It was drawing 0.25A, and more recently 0.5A, with ignition off, doors locked or unlocked. Has anyone else experienced, or heard of this problem before? Any advise much appreciated.