iRobot XLife Extended Life Battery Advanced Rechargeable Ni-MH 14.4V 300 mAh | eBay
iRobot 4419696 XLife Extended Life Battery - Newegg.com
Amazon.com: iRobot Roomba Authentic Replacement Parts - XLife Extended Life Battery - Compatible with Roomba 400 600 700 800 Series Robots : Home & Kitchen