Hitachi 326263 EBM315 2 Pack of 3.6-Volt Lithium-Ion 1.5 Ah Batteries Original Hitachi 3.6V EBM315 Batteries 3 Times as many charge cycles as Ni-Cad batteries 25-Percent more run time per charge that Ni-Cad batteries Overcharge and over discharge protection to increase the life of the battery Authorized Hitachi Dealers provide the Full US Hitachi Warranty