Flat Battery- Windows Open !!

[GTA_G20]

What he said^^

Sounds like when you or her walked away from the boxster, you popped the trunk and held the unlock button and rolled the windows down remotely.

The ajar trunk left the light on is what killed your battery.

[Steve Tinker]

Originally Posted by GTA_G20

What he said^^
The ajar trunk left the light on is what killed your battery.

The trunk (boot) light goes off automatically after +/- 2 hours, so that's not what's flattening the battery.... but as you correctly said, maybe the OP accidently pressed the key fob button and rolled down the windows & unlocked the car too. If the car was left unlocked, it won't automatically lock for about 5 days, which (IIRC) puts more drain on the battery.