Bob- The tool works in both forward and reverse. Please understand that this is a ratchet wrench and not an impact wrench. Ratchets are designed to run down and remove smaller fasteners quickly in tight places. It will not impact like an impact wrench and is not designed to develop large amounts of torque. With that said, this tool is powerful and will loosen much tighter fasteners than any standard ratchet that are rated at 50 to 60 ft-lbs. torque.
No, it does not require a battery.