Mighty Max Battery 14.4v NICD 2000MAH Replacement Battery for Roomba 400 Series Brand Product 14.4V 2.0AH NiCD Battery Mighty Max batteries are made with the highest quality materials. This battery is fully compatible with all Roomba FloorVac models Compatible with iRobot Models: iRobot Discovery Series iRobot Dirt Dog Models 1 Year Warranty