Everything you need to know about automotive batteries

Your automobile battery starts the vehicle, powers your electronics and accessories, and is essential to start your car or truck and keep it running. Most batteries last 3-4 years on average, although some do last longer. If you're having a problem, use the articles below to help identify the issue, select a replacement, and install your new battery.

Signs of a Bad Battery

If your vehicle is having trouble starting or you suspect a battery issue, it’s important to learn the signs of a bad battery. Our article covers 7 ways to tell if your battery is dead.

Jump Starting Your Car

If your car’s battery has failed, a jump start can help temporarily revive it. However, it’s important to head to a repair shop or AutoZone for a permanent solution soon after. Our article walks you through the steps of jump starting your car.

Choosing the Right Battery

Selecting the right battery for your vehicle can be a daunting task, but it’s essential for optimal performance. Consider the power requirements, climate, and battery size when making your choice. Our articles cover how to choose the right Duralast car battery and the differences between Optima battery types.

Battery Life and Installation

The lifespan of a car battery can vary, depending on several factors. Learn more about how long car batteries last and how to maintain their life in our article. Installing a new battery is a relatively straightforward process, but should be done with care. Our articles on how to install a top-post battery and a side-post battery provide step-by-step instructions.

Get Help at AutoZone

If you need help with your automotive battery, visit your local AutoZone for expert advice and reliable parts. You can also order parts online at for the right part at the right price.

Advice, how-to guides, and car care information featured on and AutoZone Advice & How-To’s are presented as helpful resources for general maintenance and automotive repairs from a general perspective only and should be used at your own risk. Information is accurate and true to the best of AutoZone’s knowledge, however, there may be omissions, errors or mistakes.

Be sure to consult your owner’s manual, a repair guide, an AutoZoner at a store near you, or a licensed, professional mechanic for vehicle-specific repair information. Refer to the service manual for specific diagnostic, repair and tool information for your particular vehicle. Always chock your wheels prior to lifting a vehicle. Always disconnect the negative battery cable before servicing an electrical application on the vehicle to protect its electrical circuits in the event that a wire is accidentally pierced or grounded. Use caution when working with automotive batteries. Sulfuric acid is caustic and can burn clothing and skin or cause blindness. Always wear gloves and safety glasses and other personal protection equipment, and work in a well-ventilated area. Should electrolyte get on your body or clothing, neutralize it immediately with a solution of baking soda and water. Do not wear ties or loose clothing when working on your vehicle.

FREE Loan-A-Tool® program requires returnable deposit. Please note that the tool that you receive after placing an online order may be in a used but operable condition due to the nature of the Loan-A-Tool® program.

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