Jumper Cables are used to “jump start” or transfer power from a working battery in one car to a dead battery in another car. Each of the two cables has alligator clamps at the ends, one with a positive end, the other with a negative end. The positive end attaches to the positive terminal of the battery; the negative end attaches to the negative terminal.
A Jump Start is the action of transferring power from a working battery in one vehicle to a dead battery in another vehicle using jumper cables. Once you’ve started the engine using a jump start, you must let the engine run so the alternator can charge the battery. If you turn off the engine immediately after jump starting the vehicle, the battery will not have a sufficient charge to operate the vehicle.