To start with, find the most complete, best car battery review you can get your hands on. Once you do, compare the various brands when it comes to the life of the battery. Obviously, the longer the life of the battery the better. Read the review to find out how the batteries held up in various climates. Hot weather causes more wear and tear on a battery than cold weather, so consider the climate in which you live and drive the most.
Think about your driving habits. When you start a car, it zaps a good amount of charge out of the battery. So do you drive mostly in town or make long hauls? Short, in-town trips don't allow the battery time to recharge completely, meaning the battery won't last as long as it would if you drove long distances.
What kind of warranty does the manufacturer offer? Is it prorated or non-prorated? Don't just check the review to see if a battery has a warranty; find the warranty policy. Warranty policies vary, so make sure you read and compare them. What is the free replacement period? What kind of maintenance does the battery require? The less maintenance, the better, because maintenance means money.
Two key items to compare are the CCA and RC. CCA stands for Cold Crank Amps. It's a measure of the power of the battery. The higher the CCA number, the better. And last, but definitely not least, see what the review says about the RC, or Reserve Capacity. The RC tells you the battery's ability to provide power for your car's essential electrical equipment if the alternator were to fail. Just as with the CCA, the higher the RC number, the better.
Now that you know what type of battery your car needs and what to look for in a car battery review, it's time to find the best deal on car batteries. You want to buy the best you can afford. A cheap battery could be just that: cheap. Keep your eye out for sales, coupons and discounts. Some battery manufacturers offer rebates, too. When looking for the best deal on car batteries, don't forget to consider installation cost. An inexpensive battery can quickly become expensive if you face a huge installation fee.