Rechargeable battery for all iRobot Roomba 500 ReplacementSpecifications:Rechargeable battery for all iRobot Roomba 500 Series.models Roomba by iRobot models 580.570.560.530.510. and 500.SpecificationsChemistry:NIMHVoltage :14.4Color :YellowWarranty :1YearCapacity : 3A-3.3A-3.5A-4A-4.5A