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ThruNite TH20 high output and light weight AA battery LED headlamp


Product Description

  • A high output headlamp with max output of 520 lumens in turbo mode powered by one Li-ion 14500 750mAh battery.
  • The logarithmic scale brightness adjustment system allows any brightness from 1.6 lumens to 250 lumens. Furthermore, the TH20 features a built-in SOS signaling mode which is important when roaming out in the wild or confronting dangerous situations.
  • Unlike other light-weight headlamps which are made with plastic, the TH20 is made with aircraft grade aluminum which gives it exceptional durability and excellent heat dissipation allowing it to maintain high output for extended periods of time.
  • The advanced design gives the TH20 a light weight of 76g (battery excluded).
  • The TH20 can also use an easy to get AA battery which makes it a great choice for daily reading, camping and a tool light when you want your hands free.


  • LED: CREE XP-L V6 LED with a lifespan of 20+ years of run time.
  • Mode & Runtime (Tested by one Eneloop AA 2450mAh NIMH rechargeable battery): 
    -Firefly (0.3 lumens, 14 days
    -Infinity Low (1.6 lumens, 21 hours
    -Infinity High (230 lumens, 95 minutes )
    -Turbo (250 lumens, 93 minutes) 
  • Batteries Applicable: 1x AA battery, 1x 14500 battery.
  • Working voltage: 0.9-4.2 V.
  • Reflector: Orange Peel.
  • Peak Beam Intensity: 1120 cd
  • Beam Distance: 67 m (max.)
  • Dimensions: 70 mm * 24.5mm
  • Weight: 76g (without battery).
  • Waterproof: IPX-8 (2 m)
  • Impact Resistance: 1 m.
  • Material: Aircraft grade aluminum body with premium type III hard anodized anti-abrasive finish.
  • Accessories included: O ring, spare rubber slot.


  • Battery Installation
    Screw off the tail cap (the right cap when the switch is facing up), insert the battery with the positive terminal pointing into the battery tube and then screw on the tail cap.
    Single press the switch to turn the light on/off.
  • Change modes
    When the light is off, long press the switch to get firefly. Then long press the switch to ramp between high and low. Double click from any mode to get turbo, another double click to get SOS.
  • Memory function   
  • The light will turn on in the last mode accessed, except for firefly,turbo and SOS.


Product Reviews

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Previous | Showing reviews 16-19 of 19

  1. Excellent except the head strap slips. 4 Star Review

    Posted by on 29th Sep 2016

    It is a fantastic easy to control intuitive light. My only beef is that without a top strap the thing tends to either slip down or slip up... on a head with no hair it wouldn't be an issue.

  2. Great piece of gear. 5 Star Review

    Posted by on 25th Sep 2016

    Excellent headlamp, priced right. Brighter than I thought it would be. Light output is more than you would think for the size.

  3. Great Light 5 Star Review

    Posted by on 19th Aug 2016

    This is an excellent light I use it doing morning and evenng chores. I love that my hands are free to do whatever needs doing.

  4. Very Pleased with the TH20 5 Star Review

    Posted by on 13th Jun 2016

    Never having owned a headlight before, I don't have anything to compare this one to. Having said that, I really like the TH20. The infinitely adjustable brightness is a big plus, the construction is sturdy and straightforward, the tilt feature works great, the stretchable headband allows a good fit, and the price is very reasonable. Similarly to one of the other reviewers, I ordered the cool white LED but the tint is decidedly warm and yellowish---not a dealbreaker but ThruNite needs to pay attention to this.

    I use the TH20 for close-up work on small items, and it is a huge help in putting plenty of handsfree light exactly where I need it. I am very happy with this purchase.

Previous | Showing reviews 16-19 of 19