iRobot Roomba Series 500, 600, 700, 800, and R3 Battery
How to Replace Roomba I3 Battery: Step-by-Step Guide w/ Photos
Amazon.com: iRobot Roomba Authentic Replacement Parts - XLife Extended Life Battery - Compatible with Roomba 400 600 700 800 Series Robots : Home & Kitchen
How To Remove Battery | Roomba® 700 series | iRobot® - YouTube