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Although jumper cables are a must-have in any driver's trunk, you also have to know how to use them safely for them to be effective when needed. The very first thing you have to do before starting the process of jumping a dead battery is to ensure that all ignitions are switched off.
Attach one of the red lines to the positive end of the working battery, and the other red end goes to the same position on the opposite battery. Now that both positive charges are in place connect a black cable to the negative terminal on the dead battery before placing the last clamp on a bare metal portion of the working vehicle. The metal rod that holds your hood open is a perfect spot for placing the final cable.
When all of the cables are in place, start your engine and let it run for several minutes to charge the other battery. After a few minutes, try to start the car and take it for a run around Medina, NY for a while to let it charge completely.