Cameron Sino Battery Compatible With iRobot Roomba 614, Roomba 615, Roomba 640, Roomba 652, Roomba 665, Roomba 670 and Other Models (4000mAh) - - Amazon.com
iRobot Roomba 665 vs iRobot Roomba 650. Which is the Best? - BestAdvisor.com
iRobot Roomba 665 Vacuum Tested/Works & Comes W/Charger #J1566 | eBay
Roomba 665 Review - Cleaning Power Without the Fuss
Cameron Sino 4000mah Battery For Irobot Roomba 614,615,640,652,665,670,671,675,677,680,681,685,690,691,695,696,801,805,850,860 - Digital Batteries - AliExpress
iRobot Roomba 665 Vacuum Cleaning Robot – My Kosher Cart