Dreame L10s Ultra

It auto-empties into a 3 L bag and refills the robot from a 2.5 L clean tank, though the mop wash tray needs occasional manual wiping.

The robot is 3.8 inches tall, so it slides under most sofas and cabinets, though very low furniture may be tight.

It clears obstacles up to 20 mm, so it handles standard door sills but may stop at taller thresholds.

It covers about 2,152 sq ft on a 210-minute charge, and recharges and resumes to finish larger homes.