Richard I had a bad battery in my Buick that would start like new. But I pulled into a gas station and left the headlights on for noore than 5 minutes.. Hit the key and k-k-k-click. I shut the headlights off and was eyeballing people whoo might give me a jump. After a couple minutes of sitting there I happened to try the key again and it started like new. When I got home I went for another battery....