These Biolite headlamps are rechargeable with a micro USB, and use a unique headband design where the headlamp electronics are integrated into the fabric band in order to create a no bounce fit.  This Biolite Headlamp 750 is their top-of-the-line most powerful model, has 8 different lighting modes, and provides up to 750 lumen of light.

Details

• 750 Lumen Maximum Output
• 5 Lumen on Low, 500 Lumen on High, 750 Lumen in Burst Mode
• Lighting Modes Include: White Flood, White Spot, Spot and Flood, White Strobe, Red Flood, Red Rear Light, Red Rear Strobe, Dimming Mode, White Burst Mode
  
• Choose between Regulated Lumen or Constant Output Mode
• Electronics are Integrated into the Fabric Headband for Stability
• 3000 mAh, Lithium Ion Micro USB Rechargeable Battery
• 150 Hours on Low, 7 Hours on High, 8 Hours Reserve at 5 Lumen
  
• 15 Meter Floodlight Beam, 130 Meter Spot Beam
• Lock Out Feature
• 4-Point Tilt
• 3 ft Run Forever Cable Included to connect to external power source
• 5.3 oz (150 g)