How to jumpstart a car How to jumpstart a car When jumpstarting a car, consider safety first. If at all possible, wear safety glasses. Also, never smoke or use matches while jumpstarting a car or handling a battery.
Batteries can release explosive gases.
First, make sure that the cable connectors to the dead battery are not damaged, broken or have frayed wires. This could also be a reason that the car is getting no power, since a charge cannot freely pass through damaged cable ends. Set the brakes. If any corrosion is present, scrape this off with a small knife or other object. Do not let corrosion come in contact with bare hands.