18-Volt lithium-ion battery provides 3-amp/hr and weighs 40-percent less than Ni-Cad or NiMH batteries. 3 times as many charge cycles as Ni-Cad batteries; 25-percent more run time per charge that Ni-Cad batteries. Can be used with Hitachi Ni-Cad and NiMH tools. Overcharge and over discharge protection to increase the life of the battery.
