Interesting info, perhaps I am just paranoid I will see how it goes although I did have a dead flat a little while ago so something must have been causing a drain.

The backup battery is supposed to only draw power when the car is running (at least it's supposed to on mine) although I agree it must do all the time as I don't see how it can be that clever to differentiate.

Re the Clifford it's just what I have heard about them being "Hungry", of course it could just be "Hear say"

Martin