Our little slice of Arizona is considered a severe service area for a lot of automotive parts, not the least of which is your car's battery. The constant heat and driving demands can test your battery to the limit. If you haven't had to replace a car battery yet, you most likely will at some time in the future here in the Tempe/Phoenix area. When it comes to choosing the right battery for your car or truck you need to consider the Reserve Capacity (RC) and Cold Cranking Amps (CCA). Listen to ACDelco's Kurt Pursche explain the difference between RC and CCA and give you advice on which one is the more important item to focus on when you are deciding on your next car or truck battery.