$89.99
iRobot Roomba Authentic Replacement Parts - Lithium Ion Battery for Roomba® e & i Series Robot VacuumsAmazon$62.95
SCREENTRONICS Lithium Ion Battery Compatible Replacement for iRobot Roomba i3+ i4+ i7+ i8+ Plus Robot Vacuum Cleaner and iRobot Roomba Combo j5+ i5+ j7 j7+ j8+ Series DC 14.4V 2220mAh 32Wh # ABL-D2Amazon$29.46
LabTEC 14.4V 4000mAh NI-MH Battery Replacement for iRobot Roomba 400 Series 4000 4100 4105 4110 4130 4188 4210 4220 400 405 410 415 416 418 Robotic Vacuum Cleaner BatteryAmazon$79.00
Goodsby Replacement High Capacity Rechargeable Li-ion Battery 2210mAh 14.4V for iRobot Roomba e i j Series e5 e6 i1 i1+ i2 i2+ i3 i3+ i4 i4+ i5 i5+ i6 i6+ i7 i7+ i8 i8+ j7 j7+ Robot Vacuum CleanerAmazon$35.99
TenHutt 【Li-ion 6.0Ah!】 Replace Battery for iRobot Roomba R3 500 600 700 800 900 Series 14.4V Robot Vacuum 980, 960, 895, 890, 860, 695, 690, 680, 675, 640, 614,Extended Life BatteryAmazon