Yesterday I went out to start the car which had been stood since Friday afternoon after a 25m trip and two 5m trips... and she turned over but wouldn't start... As I tried a few times it became obvious the battery was a little drained. I hadn't left anything on, no lights or anything plugged into 12v sockets (which are inactive if ignition is off as I double checked)... Got a jump and it started immediately, took it out for a 30 mine 15m drive to put some juice back in and then did a couple of errands. Car started first time 3 times after that with only short 2-3 min trips inbetween. Then I did the 25m drive back home in the evening. This morning I got the battery checked out and it's working perfectly... Not a thing wrong with it according to the gizmo/machine they stuck on it. But they only tested it whilst it was switched off... So I still want to test it whilst running to see if the alternator is charging it properly Did a couple more short trips of around 6m and started first time each time again. I'm a little stumped... this is the second time it's happened but the first was due to me leaving sidelights on. I stuck my charger on it for an hour and it's been fine for the last couple of months. Are there things I should be checking that may be a drain? Boot lights are switched off as are interior lights (well, they are now just in case) so only the puddle lights come on when you open the door... I rarely have the stereo on, no AC in this weather temp is set on average to 20-22 depending if it's the start of a journey or the car is fully warmed up. Occasionally use the heated drivers seat (have yet to test the passenger one actually).. but not actually used heated seats for about a week. What kind of power drain does the clock, headunit and so forth have... It was only about 66hrs from parking it up Friday afternoon to trying to start it again Monday lunchtime. I don't do a lot of mileage so the car is often left for 2 or 3 days at a time without incident. Tomorrow I'll turn the car around and run the extension out and put the charger on it for a few hrs... make sure it's fully charged up... But with winter upon us, I don't want to be left stranded unexpectedly and be waiting around for the breakdown cover to arrive... especially as I could be carrying my elderly folks as my dad is disabled and rather frail.