My S2000's at the dealer in the UK. Had a flat battery, now the battery checks out fine, they can't find any power drains so they're mystified. The car had been stood for 4 days after driving ~300 miles in the two days before that, so it should have had a full charge.

The car was new on the 4th September.

Has anyone had similar battery charge problems?

Also, does anyone have any suggestions for things that could cause the problem so I can make sure the dealer has checked everything.

Thanks,
-Brian.