Set of 3: 14.4 Volt, 1.8 Amp Nickel Cadmium Rechargeable Nicard Battery Pack.This Nicad battery back is compatible with DigiTrak® DBP battery pack. It will work with Digital Control DigiTrak® Mark, Mark II, Mark III, Mark IV, Mark V, Eclipse® and LT™ receivers and remote displays.You will need a DigiTrak Battery Charger in order to recharge your Digitrak NiCad battery pack. Digitrak Mark III/IV/V battery chargers as well as Eclipse® and LT™ battery chargers are the same.