Replacement Ni-CD Battery for iRobot Roomba 500 510 530 532 535 540 550 560 562 570 580 610 R3 Vacuum Cleaner Type: Replacement Battery Chemistry: Ni-CD Voltage: 14.4V (Compatible with 14.8V) Capacity: 2500mAh Power: 36Wh Compatible with iRobot Models: iRobot Roomba 500 iRobot Roomba 510 Replacement Battery for iRobot Roomba 500 600 700 Series Vacuum Cleaner