Roomba 675 vs. 690 — Side-by-Side Roomba Comparison
Amazon.com: SPARKOLE 14.4V 5200mAh Lithium Ion Battery Compatible with iRobot Roomba 980, 960, 690, 600, 700, 800, 900 Series 985 970 965 895 890 860 695 692 680 675 640 614 : Home & Kitchen
Amazon.com: 1800LI Replacement Parts Battery for iRobot Roomba 985/980/960/600/700/800 Series Robots 614/615/640/652/665/670/671/675 /677/680/685/690/695/790/780/770/760/700/801/805/850/860/877/890/891/895 : Home & Kitchen
Roomba 675 vs 690 - Comparing Two Budget-Friendly Roombas
Amazon.com: for iRobot Replacement Parts Roomba Lithium Ion Battery Compatible with Roomba 960/895/890/860/695/680/690/675/640/614 4376392 Series 4INR 19/65 14.4V 1800mAh/26Wh (3300mah) : Home & Kitchen