The Roomba s9+ robot vacuum - our smartest, most powerful robot vacuum yet. The Roomba s9+ automatically empties into a disposable AllergenLock bag that holds dirt and dust - so you don’t have to think about vacuuming from start to finish. The s9+ has a suite of groundbreaking technology designed for a superior clean deep into corners and along edges. Using Imprint Smart Mapping, Roomba s9+ learns, maps and adapts to your home, determining the best way to clean. Battery Type - Lithium Ion.