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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 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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Showing reviews 1-15 of 24 | Next

  1. Headlamp is a Shining Star 5 Star Review

    Posted by on 5th Jul 2019

    Purchased the ThruNite TH20 as a replacement bushcraft/camping headlamp. What I first noticed was the price which was very reasonable compared to other comparable headlamps however, the fact that this runs on a single Double A battery and has varied light settings complete this rugged package for me.

  2. One of the best on Planet Earth 5 Star Review

    Posted by on 29th Aug 2018

    I have lived off grid for over 8 years and headlamps are main source of lighting so I have tried many headlamps. The ThruNite TH20 is now my number one headlamp. For MOST of your lighting needs the lowest setting is enough and this greatly extends battery life. Going with AA battery use is a no-brainer. AA usually cost same as AAA and have three times the power capacity. Single AA run-time is then about the same as a 3 AAA headlamp. There is also the option of 14500 Li-Ion battery use. Wearing comfort is a BIG factor when using a headlamp for 8 hours or more a day and the ThruNite TH20 is very comfortable to wear for hours at a time. A 18650 battery headlamp will give you longer run-time but is not nearly as comfortable as a a single AA battery headlamp. One feature I VERY much like is when adjusting level you can go either up or down by just releasing button then holding again. You do NOT have to go up then down or down then up. Also like the SOS feature. You get plenty of heads-up when battery is getting low. This is my second purchase as I gave first one to my son as a gift. Build quality looks good and am expecting to use for many years. There are many user reviews you can watch on YouTube as well and they all seem to share my enthusiasm.

  3. Great All-Around Headlamp 5 Star Review

    Posted by on 18th Aug 2018

    My little favorite headlamp.
    Easy to use, versatile and conveniently using AA
    OR 14500 Battery for hight output.
    Also one of the best priced good headlamp on
    the market!

  4. Great headlamp 5 Star Review

    Posted by on 22nd May 2018

    I love this light. Good, clean white light using a single AA battery. Great for backpacking!

  5. Can't be beat! 5 Star Review

    Posted by on 14th Feb 2018

    Purchased neutral white. UI is the easiest to learn and use. Battery disconnects with 1/4 turn of end cap. Comes on to last light level even after battery is disconnected, UI appears to be non-volatile. Lots of light from (1) AA. Complaints by some about green spectrum for me are unfounded, not an issue at all.

  6. Perfect head torch. Strong, comfortable, reliable. 5 Star Review

    Posted by on 5th Dec 2017

    I love it! I wear it everyday at work, at home, At the cottage and while camping.

  7. TH 20 Headlamp review 5 Star Review

    Posted by on 26th Oct 2017

    Best headlamp at this pricepoint.Only one AA battery or akku,aluminium housing,small size,dimmable,waterresistant,durable,leightweight.Since I bought it use it every day.

  8. head torch 5 Star Review

    Posted by on 27th Jul 2017

    Its was for a friend and hes pleased..

  9. Very good, some points for improvement. 4 Star Review

    Posted by on 16th Jun 2017

    I have this head lamp for 4 month now, use it almost daily. All in all, love it.
    BUT! the rubberband that goes around the head is started to get "wavy" like the cheap ones. That is not cool. Instead of spending on putting your brand name on it get a good quality, pure black one. There is a logo on a lamp, dont over do it.
    Second, more of a sugestion. A little pouch/carrying case for it would be nice...
    I will replace the band for my own I guess...
    Its a good product. I Recomend it.

  10. TH20 Headlamp 5 Star Review

    Posted by on 5th Apr 2017

    This is the most perfect headlamp I have ever used. I is very comfortable and has plenty of power for any task I need it for. I love the feature where you hold the on/off switch and stop when you reach the brightness you desire...awesome

  11. Tiny,ultralight and just beautiful 5 Star Review

    Posted by on 15th Mar 2017

    Just heading up is so tiny and light that it fits in your front pocket without the bulge.The best part is that you can use a double AA battery. This headlamp uses a commend day battery. I carry this everywhere in my backpack, I highly recommend

  12. 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.

  13. 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!!

  14. 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!

  15. 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.

Showing reviews 1-15 of 24 | Next