XLife battery for iRobot Roomba series 600, 700, 800 (Original)
Amazon.com: iRobot Roomba Authentic Replacement Parts - XLife Extended Life Battery - Compatible with Roomba 400 600 700 800 Series Robots : Home & Kitchen
ORIGINAL XLife Extended Life Battery iRobot Roomba 500 600 700 800 & Scooba 450 | eBay