Amazon.com - Dust Bin Filter Compatible With Irobot Roomba 650 630 620 510 520 530 535 540 536 531 500 600 Series Vacuum Cleaner Attachment Parts -
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