New 48V 6A Battery Charger Specs: Input Voltage: 110-120v AC Output Voltage: 48v DC 6 Amps Fan Forced ventilation LED Status Lights Automatic Designed for overnight charging (typically 5 hours depending on your batteries capacity level and condition). Built with quality parts these premium chargers have undergone rigorous lab testing at the manufacturer. Upon receiving a consignment of chargers into our warehouse, we examine and bench test every individual charger before they are shipped to you.OVERCHARGE PROTECTION:Never worry about overcharging, as the charger automatically stops when batteries reach set voltage.