L322 2002 RR battery going flat when car is open & closed lots times through out day.

I have been doing a few track days recently and I use the rangy to tow the car to the circuit. I then go in and out of the RR quite a few times through out the day, to sit in it, for breaks, having lunch, getting stuff out of the boot etc. I don't have the TV on or have the radio on or move the seats, but by the end of the day the battery is flat enough not to turn the engine over.

Now I know that everytime I unlock the car the cars electronics come to life working in the background. Do you know how I can stop this from happening ? As I still need access to the car through out the day and need to keep it locked when I'm not there. Everyone is dead friendly and I get a jump start but I shouldn't have too.

I know the battery is OK because I leave the car for a week plus when I go on holiday and it starts first time no probs.

Any suggestions

Thanks..................Adam

All the electrics in the dash say powered up for some time after you've locked up. Either run the engine whenever you are in the car, or fit a battery kill switch. I suspect the second option will create far more problems!

Thanks for reply, I had another track ay this weekend and ran the RR at lunch for about 10mins and this was enough (along with reduced opening and shuttings) to get the car to start again at the end of day.

Ta.....................Adam