XLife battery for iRobot Roomba series 600, 700, 800 (Original)
iRobot Roomba 650 Vacuum Cleaner with 2 Virtual Walls, Batteries, and Filters | eBay
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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