Hitachi BCL1815 18 Volt Lithium-ion Battery 2 Pack Provided in Retail Packaging This battery is Lithium Ion 18-Volt and 1.5-Amp Hour Hitachi Battery Has three times longer battery life and half the weight of Nickle Cadmium or Nickle-Metal Hydride Maintains a steady level of power throughout charge Provided by Authorized Hitachi Distributors