I have a 2008 Outlander with the MMCS/Navi unit. Incidentally I followed the instructions on this forum and installed a rear view camera last year. I year in, it works great still

My question is: When the car is not running and is being powered by battery, how long can I play a DVD on the MMCS? Does it auto-shut off to ensure that the battery wouldn't die?

I do have the Rockford Fosgate system with that subwoofer at the back, so I suppose that will draw more power.

Thanks!