It has 5200mAh Lithium Battery. And also runs continuously for up to 150 minutes, then automatically recharges and resumes cleaning to complete the entire job & Lithium-ion cell guarantees longer battery life span. Every time the robot finishes cleaning, it would go to the dock station to charge it self, easy for your next cleaning. Single room cleaning, overall cleaning, spot cleaning, zigzag cleaning, fitting all your cleaning needs. Instant auto-mapping of your home by using 30 sets of sensors. The M7 creates a fully editable map of your home with virtual wall and forbidden area to control the cleaning zones. 4000Pa BLDC motor delivers 3X suction power for improved pick-up performance with 4 levels to choose.