UpStart Battery iRobot Roomba 4210 Battery + Universal Charger for iRobot Replacement - For iRobot Roomba (3300mAh, NIMH)
Amazon.com: HQRP AC Adapter Compatible with iRobot Roomba Dirt Dog Discovery Discovery SE [Vacuum Cleaning Robot] Fast Battery Charger Power Supply Cord : Electronics
Irobot Roomba Vacuum Battery Fast Charger 10556 | eBay
Amazon.com: PWR+ Fast Battery Charger Adapter for Irobot Roomba: UL Listed Extra Long Cord 500 880 400 600 700 800 Series 770 650 Pet 560 780 630 530 760 550 700 500 660 4210 540 415 4000 4150 4230 570 4100 510 : Electronics
UpStart Battery iRobot Roomba 790 Battery + Universal Charger for iRobot Replacement - For iRobot Roomba (3500mAh, NIMH)
Universal voltage Charger: iRobot Roomba 500 600 700 Series, 100/240