Car batteries use lead acid technology to convert chemical energy into electrical energy that can activate the starter motor when the ignition is cranked, and run electrical accessories afterward. It is a centerpiece of the starting and charging system, which is responsible for starting the engine and keeping the battery charged up.

Learn about car batteries. Whether you need to diagnose a failing battery, recharge or replace one, or do anything else with these parts, you’ll find out what it takes to do the job right.

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