14.4V NiMH 3000mAh Roomba 400 Series Rebuild Service – MTO Battery
Lithium Ion Battery for Roomba® e & i series | iRobot
Amazon.com: 14.4V 3200mAh i7 Battery Replacement for iRobot Roomba e and i Series, Large Capacity Battery Compatible with Roomba i7 i7+ i8 i6 i4 i4+ i3 i3+ i7158 J7 7150 7550 and