53 plate, 2.0 petrol hatchback Ghia

newly purchased car didn't start at first try, two days after buying! Trickle charged battery for 30 mins and all was well, and all well at next use. We don't drive every day unlike previous owner, but still need confidence that it will start.

we had been fixing the tailgate release button so lots of locking/unlocking, so it may just have been that. But was it?

Battery looks fairly new, don't mind replacing it but need to know what the problem is. Tried a meter when standing, but left door open and forgot it has footwell lights, meter with 250mA fuse blew. If my maths is right that needs 3W which seems reasonable that it could have been the light.

while I wait to acquire a new meter...does anyone know what the expected drain on the battery should be with the car standing and everything off?

not used to car with lots of gadgets, but I assume that it should still be expected to stand for at least a fortnight and still start. The old S-reg Mondeo waited four weeks in the freezing winter of 2010-11 and started first time after that. Am I asking too much of a modern car?

thanks for any help.