My trusty 2006 Roomba Discovery, still regularly cleaning my workshop. I've repaired him several times over the years, and have just replaced some MOSFETs and transistors, but he's still reliable and hard
Roomba Battery (Discovery Series) Reset Procedure by RobotShop.com - YouTube
iRobot Roomba 4210 Discovery Vacuum Cleaner FOR PARTS NOT WORKING | eBay
Ventilador de pie - Rowenta VU4210 Protect Essential, Función antimosquitos, 3v | eBay