iRobot Roomba 790 review: A charming, low-maintenance little cleaning luxury - CNET
Review: iRobot Roomba 790 | WIRED
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