Accessory mode on 2016 Avalon (non-hybrid) shuts off after 20 minutes, as per the manual. I'm guessing all newer models do this.
This is a pain the rear if I'm just listening to the radio. Also, if you want to go to a drive in movie (the only safe way to go to a movie these days), the movie theaters all use your car's sound system now!
Is there any way to disable the automatic shutoff?