ABC Products Replacement iRobot / i Robot Rechargeable Battery Pack for Roomba 500, 510, 520, 521, 530, 531, 532, 535, 540, 545, 550, 552, 555, 560, 562, 563, 564, 570, 580, 581, 582, 585, 595, 600, 610, 620, 630, 650, 651, 660, 700, 760, 770, 776, 780, 790, 870, 880, R3 Discovery series, Scooba 450 Vacuum Cleaner / Hoover etc Type: Ni-MH | Voltage: 14.4V | Capacity: 3000mAh Suits: Roomba 500, 510, 520, 521, 530, 531, 532, 535, 540, 545, 550, 552, 555, 560, 562, 563, 564, 570, 580, 581, 582, 585, 595, 600, 610, 620, 630, 650, 651, 660, 700, 760, 770, 776, 780, 790, 870, 880, R3 Discovery series, Scooba 450 Vacuum Cleaner / Hoover and many more 1 Year Warranty