Make sure RoboVac is fully charged (indicated by a solid blue LED light) before cleaning.The cleaning time will be affected by the suction mode and floors/carpets to be cleaned:- Standard suction mode (on hardwood floors): Approx. 80 minutes of cleaning- Max suction mode (on medium-pile carpets): Approx. 40 minutes of cleaningIf your cleaning time is much less than the time mentioned above, contact eufy customer service for help.