iRobot Roomba 800 Series ditches bristles for improved performance
iRobot Roomba 800 Series Repair - iFixit
Amazon.com - iRobot Roomba Authentic Replacement Parts - Roomba 800 and 900 Series Replenishment Kit (3 AeroForce Filters, 2 Spinning Side Brushes, and 1 Set of Multi-Surface Rubber Brushes)
Compatible Premium Battery 14.4V like 2130LI for iRobot Robot Vacuum
User manual iRobot Roomba 800 (English - 15 pages)