I didn't lock that car with the remote, but the camera ran for a lot longer than 5 minutes. And to be honest I said the camera turned off after I unplugged it, but actually I just guessed at that, because it was a couple of weeks ago and I haven't used it since then. I'll pay attention when I use it again, and that will be soon now that the weather is starting to really warm up now. I wonder why some cars still have accessory power after the engine is not running, and the key is removed ? I know on my newer car the headlights stay on for a bit after I get out of the car, and I think I can set something for how long I want them to stay on.