If I understand correctly, these cars have auto-off on the headlights (after three minutes). I left my lights on for about 10 minutes (daytime, raining, had to sit for a while, and I had shut car off). When I went to start it, I noticed the switch was still on, had been on maybe 10-15 min's. But looked like lights were already off? Is that how these work? Hope so, I like to get a lot of use from a battery.