Mighty Max Battery 14.4V NiCD APS Battery for iRobot Roomba 500 Series-Special Brand Product Easy to charge and connect APS battery compatible with all Roomba FloorVac models Replacement Battery for iRobot Roomba 500 600 700 Series Vacuum Cleaner 14.4V 2.0AH NiCD Battery Mighty Max batteries are made with the highest quality materials. 1 Year Warranty