Black Diamond Equipment "No need to be in the dark after your primary power source comes to an end. Black Diamond gives you nighttime visibility and then some. The Space Shot 2 features a voltage regulator that guarantees 9 hours of continuous bright halogen light, plus a 6-volt back-up battery that powers your LED for 12 additional hours. Spare bright bulb included. Requires six AA batteries (not included) and one 6v backup battery (included). 15.6 oz. Closeouts. China."