E. Roomba 400 Series Replacement Battery with 3500mAh 14.4V Ni-MH Battery for iRobot Roomba APS 4905 400 Series Vacuum Cleaner, Mobile Phones & Gadgets, Mobile & Gadget Accessories, Power Banks & Chargers
iRobot Roomba 400 Series Battery 17373 - Best Buy
Roomba Battery Replacement and 3 Essential Things to Know
NiMH Battery Pack: 14.4V 3.3Ah for iRobot Roomba 4905 400 series Vacuum Cleaner