My Roomba 400 series iRobot in Action! [4162] - YouTube
Amazon.com - iRobot Self-Charging Home Base 4931 (Compatible with iRobot Dirt Dog, iRobot Roomba 400 Series and Discovery Series) - Robotic Intelligent Vacuums
Roomba 400 (Discovery?) and docking station. • Robot Reviews
Amazon.com: T POWER 22V Charger for IRobot Roomba 400 500 600 660 670 700 760 770 780 790 880, 400, 500, 600, 700, 800 Series Vacuum Cleaner Full Range of Sweeping Machines Ac Dc Adapter Power Supply : Electronics
14.4VBattery For iRobot Roomba 400 500 600 650 700 800 595 620 660 780 Series | eBay