Amazon.com - iRobot Roomba Authentic Replacement Parts - Roomba 1800 Lithium Ion Battery - Compatible with Roomba 960 895 890 860 695 680 690 675 640 614
Amazon.com: iRobot Roomba Authentic Replacement Parts - XLife Extended Life Battery - Compatible with Roomba 400 600 700 800 Series Robots : Home & Kitchen