Any good bigger capacity batteries out there for an i7 to replace this 1800mah battery : r/roomba
Amazon.com: KUNLUN 3200mAh ABL-D1 Battery Replacement for iRobot Roomba i7 i7+ i3 i3+ i4 i4+ and More e and i Series Vacuum 4624864 Lithium Ion Battery 14.4V Extended Life : Home &