Here's why:
* Internal Combustion Engines: Most ATVs are powered by internal combustion engines, which generate DC power.
* Starting System: The battery's primary function is to provide the initial power to start the engine.
* Other Electrical Components: The battery also powers the ATV's electrical components like lights, ignition system, and accessories, all of which run on DC.
While some electric ATVs may use AC (Alternating Current) batteries, the vast majority of gas-powered ATVs utilize DC batteries.
