An alternator drive belt is a malleable rubber belt that helps the alternator operate in a motor vehicle. A belt-driven alternator can operate at two to three times crankshaft speed.
The drive belt is attached on the right-hand side of the alternator on most vehicles and drives the alternator by using a belt and pulley system. The alternator is used in motor vehicles that have been manufactured since the 1960s. The functions of the alternator are to charge the car battery and supply the needed power to electrical systems of the vehicle. The Chrysler Corporation was the first to use an alternator in 1960.