First of all, maintenance of the battery is essential to avoid its failure. The things you will need are safety gear, baking soda, petroleum jelly, as well as a battery post, and a cable cleaner. Turn off your engine and disconnect the negative battery cable. You can check the electrolyte level and inspect the condition of the battery. Clean terminals of any dirt and apply petroleum jelly. Also, tighten the hold-down clamp and remove corrosion.