Amazon.com: Maximalpower Lithium Roomba Replacement Battery For iRobot Roomba 500, 600, 700, 800, 900, 960, 980 Series and Scooba 450, 4500mAh Capacity : Home & Kitchen
Amazon.com - Replacement Parts for iRobot Roomba 500 Series Roomba 555 560 561 562 570 581 Vacuum Cleaning Robots Other Models with Green or Red Cleaning Head.