... source: two 18650, 4400mAh, 4.2V batteries with two parallel connection. 1.1 Sheath Materials Aero aluminum ... source consists of two18650, 4400mAh, 4.2V batteries with two parallel connection. Generally, it can work continuously ... 2 hours.1.5 Light Source Maximum brightness 1200LM with drive current 2500MA Farthest distance illuminate 300M1.6 ... and lithium battery. CREE XML-T6 headtorch with strap