X5M battery dead after cleaning

[kennyt]

It was sunny and warm on Sat so I decided to wash my X5M and vacuum it. I spent a few hours cleaning the car with one door open at a time and by the time I was done the battery was dead. I couldn't start the car and couldn't even open the trunk. Put it on a charger and battery had only 9% left. I had nothing on during clean up, just the door light. Imagine taking the car to a detail shop..may have to call a tow truck if you don't have a battery charger handy.

I also cleaned up my wife's 09 Accord at the same time and had the door light on too and the Accord didn't have any problem.

Did anyone experience this?