Replacement iRobot Roomba 551 Battery - For iRobot 80501 Robotic Vacuum Cleaner Battery (2000mAh, 14.4V, NICD) Replacement iRobot Roomba Battery for Roomba 510, Roomba 535, Roomba 562, Roomba 580, Roomba 500 - AeroVac, Roomba 551, Roomba 780, Roomba 530 - AeroVac, Roomba 540 - AeroVac, Roomba 570 - AeroVac, Roomba 590 - AeroVac, Roomba 530, Roomba 540, Roomba 570, Roomba 590, Roomba 536, Roomba 760, Roomba 500, Roomba 532 - AeroVac, Roomba 560 - AeroVac, Roomba 572 - AeroVac, Roomba 610 - AeroVac, Roomba 532, Roomba 560, Roomba 572, Roomba 610, Roomba 550 Battery Capacity: 2000mAh, Voltage: 14.4, Type: Nickel-Cadmium One Year Warranty On Sale for a Limited Time! Grade A Quality. High Capacity.