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This generates a bigger electrical current. Turning the ignition triggers the acid in the liquid electrolyte solution to react with the active material on the plates (active material refers to any substance in the battery that reacts with the solution to discharge or recharge the battery). A typical lead-acid car battery contains plates of lead alternating with plates made up of other materials, all immersed in an electrolyte solution of about one-third sulfuric acid and two-thirds water. The two types of auto batteries - flooded and AGM batteries - use lead-acid technology.

When those contacts close, the battery sends voltage to the starter motor, which turns some gears to start the car.

When you turn the ignition, it sends a small electrical current to the starter relay.

The switch controls the starter relay (also called a solenoid).

The ignition switch is either the starter button you press or where you insert your key.

There are three main components in this system: The car battery is part of the starting system. It also acts as a surge protector for the car's computer and provides power for short-term use of things like lights, stereo, GPS or wipers when the engine is off. The first purpose of an auto battery is to provide power for starting your vehicle.

What the different types of auto batteries are.

Here’s a simple guide to understanding how car batteries work, from the alternator to cold cranking amps to different types of car batteries.