MaximalPower Li-ion High Capacity Replacement Battery for iRobot Roomba 500 600 700 800 Series (4500mAh Capacity) New MaximalPower Replacement Battery for: iRobot Roomba 500, 600, 700, 800 Series Vacuum Batteries Battery Type: Lithium-ion. Capacity: 14.4v 4500mAh /6000mAh (EXTENDED CAPACITY) 4 times battery life compare to OEM Roomba battery with 3200mAh Replaces the following OEM battery part numbers: 11702, 80501, GD-Roomba-500, VAC-500NMH-33