Used this fan for tent camping for a weekend. This little fan pushes some air! I actually had to get under the covers and lower the fan speed during the night. I had a deep cycle 12V battery for the entire weekend and never lost power. I ran it for approx. 12 hrs each evening, never ran low on power. The fan noise was low and reasonable for the air flow you were getting. Other campers with us had different types of 12V fans and they all liked the one i purchased. Good job MFG!