22.5V 1.25A AC Adapter Charger for iRobot Roomba 540 550 560 562 570 580 Power | eBay
V Cr B R 500 510 530 532 534 535 540 770 780 650 £5.80 thenationalherald.com
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 -