A portable battery jumper works by providing the car's starter motor with the necessary power to start the engine. If used properly, it allows the you to jump start your car without another vehicle. More »

www.reference.com Vehicles Car Parts & Maintenance

Amazon.com reviewers rate both the Nano Jump Starter Kit and the Anker PowerCore Jump Starter 400 at five out of five stars. Walmart reviewers give the Stanley 1000-Amp Peak Jump Starter with Compressor 4.3 out of five s... More »

www.reference.com Vehicles Car Parts & Maintenance

A portable battery jump starter eliminates the need for another vehicle and lengthy cables to jump start a car. If a car engine doesn't start, hooking the portable jump starter to the battery gives it the boost it needs ... More »

The starter motor of a car works by engaging with a gear found on the flywheel of the engine to start the combustion process. A starter motor and a starter solenoid comprise the starting system of a car. More »

A car solenoid is an important part of the starter and works as a kind of bridge for electric power to travel from the battery to the starter. The solenoid can be located in the car by using an owner's manual for the car... More »

A starter relay, or starter solenoid, works by completing the circuit that brings electric current from a vehicle's battery to the starter motor of the engine. The starter relay can typically be located by following the ... More »

To jump-start a car, apply jumper cables to the car's dead battery and the live battery of another car. Run the engine of the car with the live battery for a few minutes, then turn the key in the ignition of the car with... More »