I agree. We own four of these seat warmers and YOU MUST UNPLUG THE SEAT WHEN CAR IS TURNED OFF!! We had to replace two car batteries because we left it plugged in over night. A hard lesson, but now we unplug it each and every time we shut off the car. (we have reminder notes all over the place) There are some models of cars which shut everything off when turned off. But would I still unplug the seat just in case. I love the seat and the warmth, but I wish it came with an automatic shut off switch.