Amazon.com: ANCBD ABL-D1 Replacement Lithium Ion Battery for iRobot Roomba e e5 e6 and i i3 i4 i6 I7 i7+ i8 Plus Series 4INR19/65 DC 14.4V 1800mAh / 26Wh : Automotive
iRobot Original Li-ion Battery 1800mAh/14.4V for the Roomba 'e' and 'i' Series
iRobot Roomba Battery for Select 500, 600, and 700 Series
ABL-D1 4624864 4INR19/65 Battery iRobot Roomba e e5 e6 I7 i7+ i3+ i4+ i8+ Plus | eBay