I have noticed here in California the the police always leave their patrol cars running when parked. I was entering a restaurant a saw a patrol car running. I saw the officer inside and asked him why they leave the cars running. I asked him if was to be ready to take off fast.
He laughed and said that there is so much electronics inside that the battery would run down during lunch.
I didn't think to ask why they didn't turn off the electronics. I also didn't ask what they do at the end of the day.
