TO GO WITH STORY BY DAVE MCHUGH** The disc-shape robot vacuum cleaner "RoboCleaner RC 3000", front, of German cleaning system producer Alfred Kaercher GmbH & Co. rolls back to its charging station,
Karcher Robocleaner RC3000 Battery for Floor Cleaning Robot
Robot Vacuum Cleaner Battery 6v/2100mah 2.891-029.0 For Karcher Robocleaner Rc3000 - Digital Batteries - AliExpress