The big Floor Scrubber is losing power way to quick. It will barely get through the ground floor before the battery indicator is flashing red. It used to be able to get through the entire ground floor/courtyard and back hallways of the ground floor before the battery indicator flashed red. Now it was barely able to do the courtyard and part of the ground floor before it flashed red and I had to switch to a different floor scrubber to finish the ground floor.