... uses American CREE Q5, 250 lumens, light color is white, 100,000 hours working life, almost no exchange its bulb, ultra ... to multi-cell lithium battery input voltage range is 3.6 - 9V. The battery options available 3 hours of continuous lighting ... lighting two hours or one 18650 battery.6. Head lens for optical glass lenses7. Tail button switch design, feel moderate to facilitate the ...