All About Car Batteries

Everything you need to know about your new car battery is now in one place! Learn about the different types of batteries, which battery type is right for you, and even how to recycle your old battery.

Free Battery Testing

O'Reilly Auto Parts employee performing a battery test on a vehicle

Having car trouble and think your battery might be the problem? Stop by an O’Reilly Auto Parts store and let us test your battery for free. You can bring in your vehicle and let us test the battery inside your vehicle, or bring the battery itself into the store. Once you’ve made sure it’s your battery that needs to be replaced, our Professional Parts People can help you determine what your choices are for a new battery.

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Car Battery Basics

The three things to consider when you purchase an automotive battery are group size, cold cranking amps (CCA), and reserve capacity (RC).

• Group size: the physical dimensions and terminal locations of the battery.
• Cold Cranking Amps: the measure of a battery’s ability to start in cold temperatures.
• Reserve Capacity: the best representation of a battery’s overall performance in all conditions.
Group size of automotive batteries

The group size of your replacement battery is essential for fit and function. The cold cranking amps and reserve capacity can be upgraded, but should never drop below manufacturer specifications. When CCA and RC are below manufacturer specifications, you can experience loss of power, a battery that dies before it should, and greater expense in the long run.
Conventional and absorbant glass mat automotive batteries

Automotive batteries fall into two categories: Conventional and Absorbent Glass Mat (AGM). These two types of batteries look similar on the outside, and inside, they both use metal plates that promote conductivity as well as electrolyte, which is a combination of sulfuric acid and water that flows freely around the plates.
AGM battery

The difference in AGM batteries is that their plates are wrapped in absorbent glass mat material that keeps the electrolyte in more consistent contact with the plates. This technology improves the performance of AGM batteries by making them twenty times more vibration-resistant, spill-proof and faster-charging. They can also get up to twice the cycle life of conventional batteries and supply more power for electronics.

Car Battery Recycling

SuperStart free car battery recycling

Remarkably, lead-acid batteries like automotive batteries are the most-recycled consumer products in the United States, at a rate of 99%. Your local O’Reilly Auto Parts store will recycle your used automotive batteries for you for free.

Additional Resources

The automotive repair work depicted in this series is performed under the direction of the manufacturer of the product featured. Prior to undertaking any of the demonstrated repairs on your vehicle, we suggest you consult with a certified mechanic or another professional who can adequately advise you of the proper repair or remedy required. O’Reilly Automotive Stores, Inc. and its affiliates (“O’Reilly”) disclaims any responsibility for injury or damage resulting from a viewer’s attempt to recreate the repairs shown in this series.