Updating Map... See why the Art Institute of Chicago is the only museum in the world to be... See why the Art Institute of Chicago is the only museum in the world to be top-ranked by TripAdvisor four years in a row! Experience the greatest Impressionist collection outside Paris, and view contemporary masterpieces in the spectacular Modern Wing.
A battery with 40 amp-hrs of charge will easily start a car that is otherwise ready and willing to go. Less! Anyone with even a decrepit 10-amp battery charger will tell you it doesn't take all day just to get that one crucial start. I've taken a stone-dead battery up to starting power in about 30 minutes.
How long do you have to run a car engine to charge the battery back to the point it was at before starting the car?