Battery Charger Charger Output Voltage 14.4 to 36.0 Cordless Tool Battery Type Li-Ion Charger Input Voltage 120VAC Number of Ports 8 Series Ultra-M Features Heavy Duty Aluminum Housing Ultra-M technology Patented AIR COOLED Charging Technology Microcontroller with Constant Monitoring of Voltage Flow Temperature Flow and Maximum Temperature For Use With Metabo 14.4 18.0 36.0V Batteries