Battery drain?

[Cornershop]

Gents,

The battery on my S8 has completely flattened a couple of times now in the space of 4 weeks. In between, I bought the AA solar conditioner, but forgot to plug it in, after its last use on Monday afternoon.

This evening, it's completely flat - can't use the blipper, no lights on dash, no nuffink.

Somewhat coincidentally (I think) on both occasions, the car has been parked on a slight downward incline, perpendicular to the kerb, left side down. We live in purpose built flats with shared parking slots, so don't always get to park where I want, ie in front of the flat and on a level.

Probably nothing, but is there anything that could be left enabled, by parking on an incline ? I'm thinking of maybe the alarm module, is there a tilt sensor perhaps?

It's also entirely possible the battery was screwed after the first time, hence its failed again so soon, although I did leave attached to the the CTEK overnight.

Anything i can test via VCDS?

Cheers folks