Replacement Battery 14.4V 3000mAh For iRobot Roomba 500 600 700 800 Series Vacuum Cleaner 540 785 530 595 650 760 870 _ - AliExpress Mobile
22.5V 1.25A AC Adapter Charger for iRobot Roomba 540 550 560 562 570 580 Power | eBay
iRobot Roomba Vacuum 540 Reviews – Viewpoints.com
14.4V Battery for IROBOT ROOMBA 500 530 700 600 Series Ni-MH 540 770 630 800 900 | eBay
Amazon.com - Syenrgy Digital Vacuum Cleaner Accessory Kit Works With iRobot Roomba 540 Vacuum Cleaner Accessory Kit Roomba 500 Series - Includes Battery, Side Brush & Filter -