Having with a flat car battery is never ideal. We have all been there – you're leaving the supermarket and you see someone who clearly can’t get their car turned on. They are jump starting their dead car battery with the help of a good samaritan. What happens when that is you in their position, or you are the closest person and are being called on to jump-start someone else’s car? As a driver, it is important that you know how to jump-start a vehicle for your own emergency.