Amazon.com: Synergy Digital Vacuum Cleaner Battery, Works with iRobot Roomba 531 Vacuum Cleaner, (Ni-MH, 14.4, 2800mAh) Ultra High Capacity Battery : Home & Kitchen
Amazon.com: Neutop Replacement Parts Accessories Compatible with iRobot Roomba 500 Series 555 560 561 562 570 581 and Other Models with Green or Red Cleaning Head. : Home & Kitchen
Amazon.com: SPARKOLE 5300mAh Extended Life Lithium Ion Battery Compatible with iRobot Roomba 500 600 700 800 Series 880 770 650 655 870 760 780 790 645 595 585 561 560 550 531 861 864 866 775 780 : Home & Kitchen
Amazon.com: Creatchy Accessory for Irobot Roomba 600 610 620 650 Series Vacuum Cleaner Replacement Part Kit - Includes 3 Pack Filter, Side Brush, and 1 Pack Bristle Brush : Home & Kitchen