Sure, I'm leaning toward believing that Jessica was in that hospital and that was her uniform, given her size, but I could be wrong. Maybe the battery was used for something else like lights like you said but it's still kinda weird, I'd think a hospital would have a more sophisticated emergency lighting system than that. Or it could be that Jessica was taken on her bed from the hospital where she was found to this other "hospital" and this hospital was just a torture area instead of a real hospital, and that could be why they need lights. We'll see. I'm sure not going to claim that this battery had nothing to do with torture as you have done.