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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 one common 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 16-28 of 28

  1. Good AA headlamp 4 Star Review

    Posted by on 2nd Mar 2017

    Powerful as for an AA, solid, durable, with a cool, gradual brightness interface. Just, as for an AA light it could be a tad lighter. This is not a thrower, but it is well balanced anyway.

  2. Awesome light 5 Star Review

    Posted by on 27th Feb 2017

    I absolutely love this headlamp!! It's perfect for me when I take the dogs out at night. I have MS and I have to use a cane. I also like to keep my pistol on me at all times too for protection. I keep my little dog on a leash so you can see just with the leash and cane my hands are full, add my weapon and a flashlight and I'd need to be an octopus! With this lightweight, perfectly bright headlamp my hands can be free. I can keep my weapon on my hip and if there's an issue I can release my dog and cane and be able to safely see and protect myself. (Don't worry, I can stand without my cane, long enough to protect myself and get to safety.) This little headlamp is a real lifesaver for me and I'm super thankful to the folks at ThruNite for making such an quality product!!

  3. Very Dependable! 5 Star Review

    Posted by on 19th Feb 2017

    My wife and I each have the TH20 and Love Them! When you need light And both hands... This is the light you need. Multiple brightness levels, great battery life and... Dependable! All on a single AA battery!

    We even bought one for a friend!

  4. Small lite, Big performance 5 Star Review

    Posted by on 6th Jan 2017

    I saw this on a youtube outdoor winter camping video. It seemed very useful and not very big, so I ordered one.
    Great price, very floody, lasts quite a while, all from just a AA.

  5. nice lamp! 5 Star Review

    Posted by on 28th Dec 2016

    Lightweight and bright! Very good lamp

  6. Excellent produit 5 Star Review

    Posted by on 15th Dec 2016

    Excellent produit
    Bonne conception très bien étudié éclaire parfaitement bien
    Pas de point chaud éclairage large super rien à redire

  7. Lightweight and Bright 5 Star Review

    Posted by on 30th Oct 2016

    It really is hard to find anything to complain about with this light.
    It is plenty bright using just a AA battery.(apparently even brighter with a 14500 battery)
    It puts out a nice broad pattern that works nicely for a headlamp.
    It is also very light and comfortable to wear.
    While I really do like my headlights to have a red light function with this light's lowest mode so far I have not missed the red light.
    I feel it is priced realistically as well... Not super cheap but not $100 either.
    Well built, small, light, comfortable, functional light for the money.
    If I had to make any suggestions I would say to go with the natural white version.
    In my opinion it really is the most useful color option and I am not really sure why ThruNite would take the time to offer the cool white version.

    I can't find a single thing to complain about with this light.

  8. Compact AA Headlamp for people seeking great gear. 5 Star Review

    Posted by on 29th Oct 2016

    I found the form factor to be great. One button operates on/off and variable brightness from firefly to fully bright. Simply unscrew the tailcap to lock out light in your pack. I have used with both the 14500 and AA batteries. Either will provide more than enough light to explore the night. I bought a second one I liked it so much.

  9. Great bit of kit 5 Star Review

    Posted by on 8th Oct 2016

    Had my th20 3 weeks ago I've used it every day and can't fault it's quality and performance I have and will recommend your products to friends

  10. 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.

  11. 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.

  12. 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.

  13. 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 16-28 of 28

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