A:Answer Yes, the bot will travel back to the base when it senses the battery low, however most of the time it gets lost along the way and I will find it "dead" and have to take it back to its base. Yes, it transitions well from hard floor to carpet, except watch out for throw rugs with long fringe, it can get caught up. We run it downstairs everyday - about 2K sq ft, and it takes about 2 charges to do the entire area. The dust collecting bin is small, so it needs to be empty after each charge.