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  • Nitecore NU25 Triple Output USB Rechargeable Headlamp with Ultralight Headband
  • Nitecore NU25 Triple Output USB Rechargeable Headlamp with Wide Headband
  • Nitecore NU25 Triple Output USB Rechargeable Headlamp with Ultralight Headband
  • Nitecore NU25 Triple Output USB Rechargeable Headlamp with Wide Headband
  • Nitecore NU25 Triple Output USB Rechargeable Headlamp with Wide Headband
  • Nitecore NU25 Triple Output USB Rechargeable Headlamp with Wide Headband
  • UL headband colors
  • Nitecore NU25 UL Headband Only includes Mounting Bracket
  • Nitecore NU25 Triple Output USB Rechargeable Headlamp
  • Triple output, compact design, USB rechargeable
  • 360 lumen output, 266 ft (81 m) beam distance
  • 3 LED sources - main, red, auxiliary white
  • 100˚ wide-angle flood
  • Red light preserves night vision
  • High CRI auxiliary white light
  • High CRI for more vivid, natural color
  • Constant illumination without flickering - easier on your eyes
  • 4 brightness levels, 3 sources, 3 special modes
  • Specifications
  • Compact & Lightweight
  • 60˚ tilt
  • Ultralight design
  • Micro USB charging
  • Integrated battery equal to 3 AAA batteries
  • Over 500 recharge cycles
  • Rechargeable Li-ion battery is environmentally friendly
  • Fully functional while charging
  • Battery power indicator
  • Lockout to prevent turning on in pocket or pack
  • Fliexible printed circuit heat dissipation
  • IP66 Impact Resistant to 4.9 ft (1.5 m)
  • Silicon strip keeps sweat out of your eyes
  • Features

Nitecore® NU25 Triple Output USB Rechargeable Headlamp

  • 3 LEDs – Main, Aux White, Red
  • Brightness up to 360 lumens, runtime up to 160 hours
  • Main LED has 4 brightness levels + 2 rescue modes
  • Red LED preserves night vision
  • High CRI auxiliary white LED for more natural color
  • Integrated Li-ion micro-USB rechargeable battery
  • Plug into a power bank battery to recharge
  • Featherlight – 1.17 oz (33.0 g)
  • Exclusive UL headband


Nitecore® NU25 is a triple output USB rechargeable headlamp. The main LED has four brightness levels up to 360 lumens and a runtime of up to 160 hours on low plus two rescue modes. A red LED preserves night vision and an auxiliary high CRI white LED is great for reading. With our exclusive UL headband it’s light as a feather at just 1.17 oz (33.0 g). And recharge by simply plugging into a power bank. A thru hiker favorite.

NU25 has a micro-textured reflector providing 100˚ wide-angle flood illumination for outstanding night vision. The light tilts down up to 60˚ for reading or close-up work. The wide elastic headband is comfortable and highly adjustable to fit your head, hat, or helmet. Our optional UL headband reduces weight with full adjustability and functionality.


In addition to the main light, NU25 also has two auxiliary lights – red and white. The red LED helps preserve night vision and won’t blind your friends. Use low during star gazing or night photography, high for gear organizing or doing camp chores, or caution for a repeated short red flash.

The auxiliary white light uses a neutral white LED with high CRI ≥ 90 for more vivid, natural color and reduced eye strain. It’s great for short-range illumination, like reading a map. CRI (Color Rendering Index) is a measurement of how colors look under a light source as compared with sunlight. The index is measured from 0-100, with a perfect 100 indicating colors under the light source appear the same as they would under natural sunlight.


The headlamp has two buttons – Power and Red (R). For low light, press Power once. Within 3 sec, repeatedly press Power to cycle from low>medium>high>off. Hold down Red to immediately turn off or after 3 sec, press either button to turn off. Alternatively, for medium, press Power twice, and for high press Power three times. Hold down Red to turn off. To enter turbo mode, with the light turned on in any mode, hold down Power for 1 sec, and hold down Red to turn off.

You can also access two rescue modes, SOS and location beacon. SOS repeatedly flashes SOS in Morse code (. . . ––– . . .) The location beacon repeatedly flashes a single short flash. Hold down Power for 3 sec to enter SOS mode. Pressing Power within 3 sec again will change to beacon mode. After 3 sec, press either button to turn off.

For auxiliary white, hold down Power to turn on and hold down Red to turn off. For auxiliary red, press Red once for low, then within 3 sec, repeatedly press Red to cycle from low>high>caution>off. Hold down Red to turn off.

Press both buttons at the same time to lockout NU25 and prevent the light from turning on while in your pocket or pack. A red indicator blinks once to indicate lockout. Press both buttons again to reactivate the headlamp and enter low mode.

LED Mode Output (lumens) Turn On Turn Off
Main Low 1 Press POWER Once Hold down RED
Medium 38 Press POWER Twice Hold down RED
High 190 Press POWER Three Times Hold down RED
Turbo 360 Light On, Hold down POWER 1 sec Hold down RED
SOS 360 Hold down POWER 3 sec After 3 sec, Press Either
Beacon 360 Hold down POWER 3 sec, Press Once After 3 sec, Press Either
Auxiliary White - 20 From Off, Hold down POWER 1 sec Hold down RED
Auxiliary Red Low 0.9 From Off, Press RED once Hold down RED
High 13 From Low, Press RED once Hold down RED
Caution 13 From High, Press RED once Hold down RED


NU25 has a built-in, long-lasting 610 mAh Li-ion rechargeable battery that holds power equal to three AAA batteries yet is much more sustainable. An intelligent protective charging circuit and a Micro USB connection make it easy to recharge. Since you probably already carry a spare battery to charge your phone, there’s no need to worry about running out of power or replacing batteries, just plug into a power bank, wall charger, computer, or car (USB cable provided). The light maintains full functionality while charging.

To see how much battery power is left, with the light turned off, hold down the Red switch for 1 sec and release. The button will flash 3 times if you have more than 50% power, 2 times if you’re below 50%, and 1 time if you’re below 10%. Plug it in and an indicator light lets you know when the charge is complete. It takes approximately 2 hours to fully charge the battery. A rubber cover protects the USB port from dirt and moisture.

Charging State Indicator Light
Charging Steady Red
Charging Complete Steady Green




LED Mode Output (lumens) Runtime (hours) Beam Distance ft (m) Beam Intensity (cd)
Main Low 1 160 12.5 (3.8) 3.7
Medium 38 8 89 (27) 190
High 190 5 200 (61) 950
Turbo 360 0.5 266 (81) 1650
SOS 360 - - -
Beacon 360 - - -
Auxiliary White - 20 6.25 18 (5.5) 7.5
Auxiliary Red Low 0.9 68 - -
High 13 7.75 13.1 (4) 4
Caution 13 13 - -



LED Color Temperature

   Main LED: 6300K, Cool White

   Auxiliary White LED: 4500K, Neutral White

Color Rendering Index (CRI)

   Main LED: CRI ≥ 70

   Auxiliary White LED: High CRI ≥ 90

Battery: Built-in rechargeable Li-ion, 610 mAh

Lighting Modes

   Main LED: Low/Medium/High/Turbo/SOS/Beacon

   White Auxiliary: Medium

   Red Auxiliary: Low/High/Caution

Beam Pattern: 100˚ wide-angle flood

Body: Polycarbonate, impact resistant

Tilt: 60˚

Switch: Top Power and Red buttons, rubber

Charging Connection: Micro USB, rubber cover (USB cable provided)

Charging Time: 2 hours

Dimensions, Light (LxWxH): 2.19 x 1.36 x 0.91 in. (55.5 x 34.6 x 23.2 mm)

USB Cable Length: 3.3 ft (1 m)


   UL Headlamp Total1.17 oz (33.0 g) with built-in battery

   Wide Headlamp Total: 1.85 oz (52.5 g) with built-in battery

   Light with Mounting Bracket: 1.00 oz (28.3 g) with built-in battery

   UL Headband0.17 oz (4.8 g)

   Wide Headband: 0.85 oz (24.2 g)

   USB Cable: 0.79 oz (22.5 g)

Impact Resistance: 4.9 ft (1.5 m)

Ingress Protection Rating: IP66, complete dust protection and high-pressure water jet resistant


   1x Light with integrated USB rechargeable Li-ion battery

   1x Wide Headband, Black/White

   1x Micro USB to USB charging cable

   Optional: 1x UL Headband, choice of colors*

   *Nitecore packaging will be opened to install UL headband prior to shipment. UL headband must be dismantled to install wide headband.


User Manual

Nitecore NU25 User Manual



  • Very bright light, to avoid eye injuries, DO NOT stare directly into the light and DO NOT shine the light directly into the eyes of others.
  • Keep away from children to avoid injury.
  • DO NOT use if battery is damaged to avoid fire or explosion.
  • Charge in or on a fire-proof surface to avoid possible injury. DO NOT charge unattended.
  • Charge only at temperatures between 32-113°F (0-45°C) to avoid permanent damage and possible fire or explosion during charging.
  • Recycle or dispose of properly according to local regulations at end of life, DO NOT dispose in fire or incinerator as battery may catch fire and explode.

In no event shall Litesmith, LLC be liable for any direct, indirect, punitive, incidental, or special consequential damages, to property or life, whatsoever arising out of or connected with the use or misuse of its products.

Write your own product review

Showing reviews 1-10 of 22 | Next

  1. Impossibly light, great features  star rating

    Posted by Mediocre Mountaineer on 6th Sep 2019

    This thing was SO light and conveniently small. Held a charge for my three day trip to the Pemi Loop, stashed easily in my hip belt pouch for quick access. The one lumen setting was clutch for reading in bed after a long day of hiking.

  2. Great!!!  star rating

    Posted by Scott on 2nd Sep 2019

    Nice and light. Exactly as promised. Love this light. Been looking for a full featured light that recharges and doesn't weight a ton and this fills the bill.

  3. Finally!!!  star rating

    Posted by CATHY on 24th Jun 2019

    Finally! - a headlamp that ticks all the boxes. Super ultralight; rechargeable; SIMPLE & LOGICAL method to change between lighting modes; red light function; lockable. I LOVE it!!!

  4. light and bright  star rating

    Posted by Samuel Marjamaa on 4th Jun 2019

    Easy to go through different settings, super bright at highest setting, good balance between brightness of redlights. Very happy with the purchase.

  5. Bright and Light  star rating

    Posted by Howell Black on 12th May 2019

    I bought this item for camping. Have used it several times now and love it. I have it's little brother also the one with no red light.
    I love that this has a red light because I tend to blind everyone in camp while I am traipsing around looking for things.
    The white light is very bright and keeps a charge a long time. If left alone it stays charged much longer then I thought it would.
    I replaced my BIG headlight that I thought that I had to have.
    Your product showed me that I don't have to have big, heavy, or batteries.
    I highly recommend this product to anyone.

  6. Terrific Light  star rating

    Posted by rickmoellendick@outlook.com on 25th Apr 2019

    Very light and works great. The Lightsmith lightweight headband is definitely the way to go. Very nice touch.

  7. Almost a perfect ultralight headlamp  star rating

    Posted by Nate L on 12th Apr 2019

    Great little light, especially if you are counting grams. Plenty bright to hike at night, and different brightness levels for when in camp. Having separate white and red buttons is great, no fumbling and doing the multi tap/hold dance trying to figure out a single button like some head lamps out there.

    Only 2 drawbacks are it charges off of a micro USB port when everything else I have now charges off of USB-C requiring carrying an extra cable. Secondly the rechargeable battery in it in not replaceable eventually making the whole headlamp a disposable item.


    Posted by TimA on 5th Apr 2019

    This headlamp is very lightweight but has long battery life and great brightness. The elastic strap is an improvement over the standard headband which is also included. Rechargeable so no need to carry batteries.

  9. UL and Comfortable  star rating

    Posted by Jarrett Roeser on 1st Apr 2019

    Perfect, inexpensive replacement for the original strap. Shaves a little weight and is actually more comfortable than the bulky elastic strap.

  10. great light  star rating

    Posted by Unknown on 31st Mar 2019

    comes in at 32.5 grams on my scale call it 1.1 oz. headlamp is great, i bought it specifically for the lock function, red light, and ability to check battery life as well as recharge capability. barely notice this thing is in my pack, or around my head.

Showing reviews 1-10 of 22 | Next

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