ACDelco GM Original Equipment Refurbished 36 Volt Drive Motor Batteries provide a mild hybrid propulsion for the Belt Alternator Starter (BAS1) applications. It comes as three separate cassettes and includes necessary components for installation. This hybrid battery has been tested, balanced, and recertified to specification directly by General Motors. In addition, refurbishing benefits the environment by returning components back into service rather than processing as scrap or simply disposing of them. These original equipment refurbished drive motor batteries have been manufactured to fit your specific GM vehicle, providing the same performance, durability, and service life you expect from General Motors.