Hitech - Two 9V Lithium-Ion Batteries and Charger Set Set includes two 9V lithium-Ion batteries and one 2-bank charger for them Battery nominal capacity: 600mA; Nominal voltage: 7.4V Charger Input: AC 100V-240V, 50-60Hz; Ooutput: DC 9V; Charging current: 300mA Great for all sorts of high-drain devices. Higher capacity than heavy-duty or alkaline batteries NOTE: These batteries MUST be only used in this charger ONLY, any others could cause damage.