Karcher's RoboCleaner is marketed as being able to run for up to nine hours unassisted and unattended.

FORBES: Magazine Article

But no worries, none of the three robovacuums I tried out--the Karcher RC3000 RoboCleaner , the Electrolux Trilobite and the Roomba Discovery from iRobot --are on the verge of giving an old-fashioned upright a run for its money.

FORBES: Magazine Article