Kyvol Cybovac S31 review: This self-emptying robot vacuum can mop, too

The Kyvol Cybovac S31 is the latest in a growing line of self-emptying robot vacuums. These completely autonomous vacuums are a wonderful luxury for most of us. But if you have allergies, asthma, or another health issue that can be triggered by the plume of dust released when you empty a dustbin, they can be a lifesaver. The S31 has a 4.3L self-emptying dustbin that can hold up to about 60 days' worth of dust before you need to replace the disposable dustbag inside it. The dustbin doubles as the robot's charging dock, providing about four hours of runtime per full charge.