Good Morning, yesterday I was working in the back of my van sound deadening the sliders, it is a T6.1 T32 2022, and I switched off the courtesy lights and the key was not in the ignition. I was opening/closing the sliders and had the tailgate open and was probably working in the back for about 3 hours. When I had finished, the van would not start and I had to get a jump start from my partners car. Any idea what would be draining my battery in this scenario?