Amazon.com - iRobot Roomba Authentic Replacement Parts - Roomba e, i, & j Series Replenishment Kit, (3 High-Efficiency Filters, 3 Edge-Sweeping Brushes, and 1 Set of Multi-Surface Rubber Brushes),Green - 4639168
Troubleshoot Roomba Charging Error 1 (The Battery Is Not Detected)
Easy solution to fix a charging error 1 on Roomba 685 - SOLVED! - YouTube
Troubleshoot Roomba Charging Error 1 (The Battery Is Not Detected)
What does Roomba Error 11 indicate, and how can I troubleshoot and fix it? - Quora
User manual iRobot Roomba 694 (English - 22 pages)