John,

When I was in England we used to leave the parking lights on all night every night without a problem.

One thing that I didn't mention 'cos it should be a given. The first thing to do is clean the battery terminals.

I once had to call a locksmith 'cos I'd locked my keys in the car. He had a gizmo that was kinda like a blood pressure cuff which he slid down the top of the door and inflated it enough to get to the latch.