The battery starts your car, learn more about how it works and when to replace.

How Batteries Work

Your battery starts your car time and time again.

Automotive batteries are made up of thick plastic cases, lead-based plates, separators, terminals and electrolytes.

Anatomy of a Car Battery

A battery is the heart of your vehicle—explore the internal components that make it tick. Learn more about the anatomy of a car battery

The lead-acid battery in your car supplies the power to start your car.

How Your Car Starts

Your battery is an integral part of your car’s starting. Learn more about how your car starts

This voltage table shows how much energy remains in a battery as the battery voltage reading changes.

Car Battery Glossary

A complete guide to commonly used battery terminology. Click here for a comprehensive battery glossary.