I was excited about not having to re-plug it in every time I wanted to go to a different room. I eagerly opened the box and read the instruction manual. And there, in black and white, it said to charge it for 7-8 hours before the first use, then it can be re-charged for 4 hours. Well, ok, charge it overnight, use it, re-charge for another 4 hours. THEN it said runtime is approximately 17 minutes. WHAT??? Charge for 7 hours, use it for 17 minutes and then re-charge it for 4 hours so you can clean for another 17 minutes???? It takes longer than that to do just one room out of 6 and a hallway. I am returning this without ever having taken it from the plastic packaging bag. MAYBE the instruction manual is wrong, but I am not about to take it apart, charge it overnight, use it for 20 minutes (assuming the manual is erring on the side of underestimating the time) then have to package it back up for the return.