The Roomba Combo 2 Essential can clean and mop floors for up to two hours on a single charge. | Image: iRobot The new Roomba Combo 2 Essential and Roomba Vac 2 Essential include a dock for self-emptying their dirt bins - a feature missing from the budget-friendly Essential robovacs that iRobot introduced six months ago. The 2-in-1 Combo 2 features both vacuuming and mopping capabilities for $424.99 and is slightly more expensive than the Vac 2, which only sucks up dust and dirt for $399.99.The Combo 2 is now the most expensive option in iRobot's Essential line and slightly pricier than the $400 DreameBot D10 Plus, our current choice for the best budget robot vacuum and mop. The Vac 2 is available via select retailers" in North America (including Target and Best Buy, so far) and has the same features as the Combo except for the mopping... Continue reading...