X-Life NiMH Battery Roomba Original Double Life 4419696 | eBay
Amazon.com: NASTIMA 14.8V 5000mAh Lithium ion Replacement Battery Compatible with iRobot Roomba 960/895/890/860/695/680/690/675/640/614, Replace The Original 1800mAh Lithium ion Battery : Home & Kitchen
Melasta 6.4Ah 14.8V Li-ion Battery for iRobot Roomba
Amazon.com: iRobot Roomba e and i Series Replacement Lithium Ion Battery : Home & Kitchen
How to Replace Roomba I3 Battery: Step-by-Step Guide w/ Photos