Lot of 2 iRobot Roomba Vacuums 540 531 Complete with charger as is | eBay
Robot Vacuum Cleaner 3500mAh NI MH Battery Pack Side brush for irobot roomba 531 600 630 631 880 770 780 790 850 Battery Parts|brush for irobot roomba|brush for irobotside brush - AliExpress
Robot Vacuum Cleaner 3500mAh NI MH Battery Pack Side brush for irobot roomba 531 600 630 631 880 770 780 790 850 Battery Parts|brush for irobot roomba|brush for irobotside brush - AliExpress
Synergy Digital Vacuum Cleaner Battery, Works with iRobot Roomba 531 Vacuum Cleaner, (Ni-MH, 14.4V, 4000 mAh) Ultra High Capacity, Compatible with Auto Cleaner 11702 Battery - Walmart.com