How to Jump a Battery With a Portable Jumper

Jumping a car is a relatively simple process. When your battery does not contain sufficient power to start your car, you use jumper cables to borrow that power from an outside source. There are two possible sources for that transference of power: another car whose alternator will provide a constant flow of power into its battery and through the jumper cables, or a portable jump pack, which is essentially a second battery designed specifically to transfer power to your car.

  • Ensure that your jumper pack is fully charged and that your car's ignition is turned off.

  • Connect the red positive (+) jumper cable to the positive (+) terminal on the car battery.

  • Connect the black negative (-) cable to an unpainted metal surface somewhere on the car as a ground. A non-moving piece of the engine block or the frame will work nicely.

  • Make sure that the jumper pack and cables are clear of any belts or fans.

  • Start the car. If the car does not start after a five-count, turn off the ignition and allow three minutes to pass before attempting again. This is to ensure that no damage occurs to the jumper pack or the car battery.

  • Start the car and, while it is running, disconnect the negative (-) cable from where you attached it to the truck and return it to the jumper pack

  • Disconnect the red positive (+) cable from the car battery and return it to the battery pack.