3.7V 5000mAh 18650 rechargeable batteries . Equipped with USB Charging Cable,.up to 9 -12 hours working time under full charge.that can give you the brightest illumination^BRIGHT LED HEADLAMP : High performance XML-T6 LED and 4* XPE headlamp flashlight.This ultra-bright headlamps .Provide you with a brightness Range of up to about 200 meters , allowing you to clearly see the surrounding nvironment to make sure you stay away from danger.^90 ADJUSTBLE AND FOCUSABLE DESIGN.:The headlamp can be rotated by 90 degrees.Together with the elastic and adjustable holding strap. Durable aluminum alloy crust, abrasion resistant and IPX5 waterproof headlamps. No need to worry about using it in all kinds of rain weather.Zoomable headlamp -When you want to focus on a specific object, zoom in to project a bright spotlight.^4 MODES HEADLAMP AND (RED WARNING LIGHT): Energy saving mode (1 * T6 LED on) ,Medium brightness mode (4 * XPE LED on) ,Super bright mode1*T64*T6XPE LED all lights up,Strobe mode LED Headlight Flashlight he rear red indicator light on the pack plays a good warning role at night, ensuring your safety when you work under bad weather.^RECHARGEABLE HEADLAMP AND LONG-LIFE BATTERY;The headlamp flashlight equips with 2*