A one hour charge via micro USB for 27 hours use makes this a favourite lightweight headlamp. The motion sensing hands free activation is great if you’re using both hands or have big gloves on! 

Manufacturer's Description:

HC3 smart sensor cap clip light from Klarus with 100 lumens brightness, wide soft floodlight; Constant light mode, one button control 5 light modes; Humanized smart sensor mode to release your hands.

• Its lightweight and fashionable design makes it very suitable for baseball caps, secure helmets, backpacks, and other equipment; HC3 is professionally designed for night fishing, hiking, dog walking, outdoor camping, and other activities. Own the little light right away! Start a rich and exciting nightlife now!
• High Output and Lightweight COB Light: 100 lumens max output, 1.31oz lightweight body, 0.91in thickness, superior user comfort. COB is led with natural lighting, no flickering, and no colour distortion, the light is uniform and more eyes care.
• 5 Modes and Easily Use: 5 lighting modes of Medium/High/Low/Red/Red Strobe, press the On/Off button to switch between 5 modes, press sensor switch button to turn on/off motion-sensor.
• Hands-Free Cap Light: A wave of your hand controls the lamp. Twin sensors, more sensitive recognition gesture.
• Quick Recharge and Long Run time: One hour charge, one-night use. 500 mAh Li-ion battery, 1 hour Micro-USB fast charge for max 27 hours of runtime.
• Weather Resistance: IPX5 waterproof standard, no worry about the rain or snow weather, the best companion at night.

5 year manufacturer's warranty - see website for details. 

Technical Summary: