Funny battery video. http://www.youtube.com/watch?v=T0C6wvCcPo4&feature=related. Batteries . Battery . An automotive battery is a type of rechargeable battery that supplies electric energy to an automobile. It is charged back by the alternator. . Purpose.
Battery are rated in both cold cranking amps and reserve capacity.
Cold Cranking Amps is the amount of amperage a battery can supply at 0 Degrees while maintaining 9.6 volts for 30 seconds
Reserve capacity: The amount of time a battery can supply 10 volts at 25 amps when not being charged reserve capacity is a battery's ability to sustain a minimum vehicle electrical load in the event of a charging system failure