Wurkkos TS21 Andúril Flashlight Review

Wurkkos TS21 Andúril Flashlight Review

The Wurkkos TS21 is a 21700 cell flashlight using the Andúril interface. The indicating switch and triple Luminus SST-20 make it great!

Official Specs and Features

Here’s a link to the Wurkkos TS21 Andúril flashlight product page.

There’s also a newer version than Wurkkos sent me… Here’s a link to the Wurkkos TS21 Flashlight with Andúril 2!


There seems to be only one version, but it’s available as a kit (with or without 21700 cell).  Actually, three colors are available:  Champagne, Metal Gray, and Black.  Three emitter temperature options exist too:  4000K (seen here), 5000K, and 6500K.


As seen here (with Anduril), these sell for $32.99 without a 21700 and $35.99 with a 21700.

The Andúril 2 version is $2 more, at $35.99.  And the 21700 cell as seen here adds $4.  For $4, it’d be silly to skip the 21700!

Short Review

TS21 using Andúril makes for a great bigger EDC flashlight.  Mine has 4000K and in the Luminus SST-20, 4000K is just fantastic.  All in all, this is a wonderful deal of a flashlight!  I’d probably pick the Andúril 2 version.  I would also love to see more accurate specifications from the manufacturer, and specifications per emitter temperature.

Long Review

The Big Table

Wurkkos TS21 Andúril Flashlight
Emitter: Luminus SST-20 (4000K (Triple))
Price in USD at publication time: $32.99
Cell: 1×21700
Turbo Runtime Graph High Runtime Graph
LVP? Yes
Switch Type: E-Switch
Quiescent Current (mA): 0.07
On-Board Charging? Yes
Charge Port Type: USB-C
Charge Graph
Power off Charge Port with cell: all modes
without cell: 5 or 6 lower modes
without body: 5 or 6 lower modes
Claimed Lumens (lm) 3500
Measured Lumens (at 30s) 1091 (31.2% of claim)^
Candela per Lumen 4.5
Claimed Throw (m) 217
Candela (Calculated) in cd (at 30s) 98lux @ 4.54m = 2020cd
Throw (Calculated) (m) 89.9 (41.4% of claim)^
Item provided for review by: Wurkkos
All my Wurkkos reviews!

^ Measurement disclaimer:  Testing flashlights is my hobby. I use hobbyist-level equipment for testing, including some I made myself. Try not to get buried in the details of manufacturer specifications versus measurements recorded here; A certain amount of difference (say, 10 or 15%) is perfectly reasonable.

What’s Included

Wurkkos TS21 Anduril Flashlight what's included

  • Wurkkos TS21 Andúril Flashlight
  • Wurkkos 5000mAh 21700
  • Charging cable (USB to USB-C)
  • Spare o-rings (2)
  • Lanyard
  • Pocket clip
  • Manual etc

Package and Manual

Build Quality and Disassembly

Wurkkos TS21 Anduril Flashlight

The build quality here is great.  Really not much more to say about it than that –  The whole product is a high-quality package.

Wurkkos TS21 Anduril Flashlight bezel

Threads, as you can see below, are square cut, anodized, and lubed.

Wurkkos TS21 Anduril Flashlight tailcap

The tailcap has a spring.

Wurkkos TS21 Anduril Flashlight tailcap spring

On the head end are the same threads – in fact, the cell tube is reversible.

Wurkkos TS21 Anduril Flashlight head threads

Only a button is here on the head though.  No spring.

Wurkkos TS21 Anduril Flashlight head button

Size and Comps

Dimension: 113.4mm (length) x 28mm (head diameter)
Weight: 78 grams (without battery)

If the flashlight will headstand, I’ll show it here (usually the third photo).  If the flashlight will tailstand, I’ll show that here, too (usually the fourth photo).

Wurkkos TS21 Anduril Flashlight in hand

Here’s the test light with the venerable Convoy S2+.  Mine’s a custom “baked” edition Nichia 219b triple.  A very nice 18650 light.

And here’s the light beside my custom engraved TorchLAB BOSS 35, an 18350 light.  I reviewed the aluminum version of that light in both 35 and 70 formats.

Wurkkos TS21 Anduril Flashlight beside the TorchLAB BOSS 35 (custom engraved)

Super shorty TS21! (Not really, of course; the parts don’t even screw together like this.)

Wurkkos TS21 Anduril Flashlight joke photo

Retention and Carry

Wurkkos includes a pocket clip.  It’s a friction-fit two-way clip and connects in the grooves of the TS21.  It’ll go on the mid-body part, and also can go on the tail end, too.

Wurkkos TS21 Anduril Flashlight pocket clip

This pocket clip is just like the one seen on the HD20 headlamp.  In fact, these two have many things in common!

Clip hug!

Wurkkos TS21 Anduril Flashlight pocket clip

That clip will go on the tail end (as above) or in the middle section (as below).

Wurkkos TS21 Anduril Flashlight pocket clip

Also included is a lanyard, which attaches through this hole in the tailcap.

Wurkkos TS21 Andúril Flashlight lanyard

You can see that the pocket clip has a hole where the lanyard could attach, too.

Wurkkos TS21 Andúril Flashlight lanyard

Not pictured here, but there’s a magnet in the tailcap, too.  It holds the Wurkkos TS21 Andúril flashlight securely, even on horizontal surfaces (like a file cabinet).

Power and Runtime

A single lithium-ion cell powers the TS21.  The proper size is 21700, and one can be included with your purchase if you opt for that package.  The cell is a 5000mAh 21700, and is not special or proprietary, or customized in any way (except the nice Wurkkos wrapper).

Wurkkos TS21 Anduril Flashlight with 21700

This does mean that other 21700 cells can be (fully) used in the TS21.  They’ll power the light and they can be charged in the light.

As depicted on the tailcap cell orientation image, the cell goes into the light in the “normal” way – positive end toward the head.

Wurkkos TS21 Anduril Flashlight with 21700 installed Wurkkos TS21 Anduril Flashlight cell orientation

Below are a few runtime graphs.  The claim of 3500 lumens is almost certainly for the 6500K emitter version, but even for the 6500K version, 3500 lumens seems a bit far-fetched.   I’m recording at 30 seconds, which is well after the stepdown.  Even the initial output is only around 2000 lumens, well under what I might expect when allowing for “lower output from the warmer emitter.”  I’ll add (in text, since it’s not searchable on the photo) that I did calibrate the thermal settings on this light before the tests.

Wurkkos TS21 Anduril Flashlight runtime graph Wurkkos TS21 Anduril Flashlight runtime graph Wurkkos TS21 Anduril Flashlight runtime graph

Low voltage protection is observed at least in some of the runs.  The light didn’t always shut off, but the switch indicated in every case that the voltage was low.  The switch will also indicate the power level for around 5 seconds after the light is turned on.  Indications are as follows:

Green: >30% power
Red:  <30% power
Flashing Red:  Low power


Another feature of the TS21 is built-in charging.  There’s a USB-C port in the head, which has a press-in cover.  This cover is quite thick, and when installed properly, very secure.  It has a thick edge and must be deliberately pushed into the opening.

An appropriate charge cable is included.  It’s USB to USB-C.

Wurkkos TS21 Andúril Flashlight charge cable

Here’s a charge graph with the USB to USB-C setup.  It’s fairly normal, and charges at around 2A.  The cell should handle that easily – it’s under 0.5C for a cell of that capacity.

Wurkkos TS21 Andúril Flashlight charge graph

And here’s a single graph of C to C charging.  I am not sure what those blips are during the CC phase.  I believe it’s a logging issue though, and not a charging issue.

Wurkkos TS21 Andúril Flashlight charge graph

Modes and Currents

Mode Mode Claimed Output (lm) Claimed Runtime Measured Lumens Tailcap Amps
Turbo (Double Click from on) 3500 (likely claim for 6500K emitter option; this is 4000K) 1091 (after stepdown!) 7.75
Highest Stepped 1081 2.75
622 1.56
Lowest Stepped 15.6mA
Lowest Ramped 2.02mA

Pulse Width Modulation

There is PWM on all modes except Turbo.  On all but the lowest output level, it’s not PWM that I can call “noticeable.”  It’s plenty fast PWM.

For reference, here’s a baseline shot, with all the room lights off and almost nothing hitting the sensor.  Also, here’s the light with the worst PWM I could find.  I’m adding multiple timescales, so it’ll be easier to compare to the test light.  Unfortunately, the PWM on this light is so bad that it doesn’t even work with my normal scale, which is 50 microseconds (50us). 10ms5ms2ms1ms0.5ms0.2ms.  In a display faster than 0.2ms or so, the on/off cycle is more than one screen, so it’d just (very incorrectly) look like a flat line.  I wrote more about this Ultrafire WF-602C flashlight and explained a little about PWM too.

User Interface and Operation

The switch seen on the Wurkkos TS21 Andúril flashlight is an indicating e-switch.  It is a hard and proud switch with a translucent center that shows one indicating emitter.

Wurkkos TS21 Anduril Flashlight e-switch

This switch is much more like Sofirn’s switch covers than other covers we’ve seen from Wurkkos.  That’s good – I prefer these harder switches.

Wurkkos TS21 Anduril Flashlight e-switch

You can see below that the indicating feature is nice and bright.

Wurkkos TS21 Anduril Flashlight e-switch backlit Wurkkos TS21 Anduril Flashlight e-switch backlit

The UI here is ToyKeeper’s Anduril, which at this point is very well covered.  I’ve reviewed other lights with it, too.  Here’s ToyKeeper’s UI graphic:

Here’s a UI table anyway!

State Action Result
Off Hold On (Low)
Off Click On (Mode Memory)
Off Click 2x Highest Hybrid Mode
Off Click 3x Blinkie Mode Group
Off Click 4x Lockout
Off Click 5x Momentary
Off Click 6x Muggle
Off Click, Click, Hold Strobe Group (Mode Memory Strobe)
Strobe Group Click 2x Strobe Cycle (Candle > Bike Flasher > Party Strobe > Tactical Strobe > Lightning Storm)
Blinkie Mode Group Click 2x Blinke Cycle (Sunset > Beacon > TempCheck > BattCheck)
On Click 3x Switch between Stepped and Smooth Ramp
On Click 4x Ramp Configuration
TempCheck Click 4x Thermal Configuration
Beacon Click 4x Beacon Configuration
Lockout Click 4x Off
Strobe Group Click Off
(Basically) On Click Off
Candle Click 3x 30-minute timer to off
Strobe Group Hold Heighten selected mode (Make faster or brighter)
Strobe Group Click, Hold Lessen selected mode (Make slower or dimmer)
On Click 2x FET Turbo
Ramp Configuration [Wait for Single flash] Click N time for level N. Selection of the “Low” you like best by clicking 1, 2, 3, etc. where 1, 2, 3, etc are different levels of low.
Ramp Configuration [Wait for Second flash] Click N time for 1+Turbo-N. Selection of the “Ceiling” you like best by clicking 1, 2, 3, etc. where 1, 2, 3, etc are different Ceiling levels.
Ramp Configuration [Wait for Third flash] Click for how many steps you want in Stepped mode. Sets Number of Steps.
Thermal Configuration [Wait for First flash] Click for N times for N degrees C. Displays Current Temperature.
Thermal Configuration [Wait for Second flash] Click for N times for 30C + N. Sets Temperature Limit.
Beacon Configuration [Wait for First flash] Click for N times N seconds per flash Sets Beacon Speed.

If you want to see how to calibrate the thermals, see this part of the FW1A review.

LED and Beam

In my review copy of the Wurkkos TS21 Andúril flashlight are three Luminus SST-20 emitters.  Three because it’s a triple…  What you see below is the 4000K version, but cooler versions are available (5000K, 6500K).

Wurkkos TS21 Anduril Flashlight emitters Wurkkos TS21 Anduril Flashlight beamshot

I don’t think the optic used here is stated, but based on the beam profile it’s almost certainly the narrow optic.  That’s perfect for me!

LED Color Report (CRI and CCT)

I can’t see the product page specifying CRI but I’m seeing this as a High-CRI emitter.  In the mid-90s for CRI, which is great.  Also, it measures under 4000K by some margin.  Again, that’s great for me personally, but you might have a different opinion.  If the 5000K is similarly below the claim, then it should be very, very, good too.


These beamshots are always with the following settings:  f8, ISO100, 0.3s shutter, and manual 5000K exposure.

Tint vs BLF-348 (KillzoneFlashlights.com 219b version) (affiliate link)

I keep the test flashlight on the left, and the BLF-348 reference flashlight on the right.

I compare everything to the KillzoneFlashlights.com 219b BLF-348 because it’s inexpensive and has the best tint!


What I like

  • Great value
  • Cell included for $3!
  • Excellent use of Andúril2 user interface
  • Triple emitters with the narrow optic give a great beam profile
  • 4000K emitter option (and they’re a little warmer than that, too!)
  • High CRI (at around 96 or so)
  • Hardcover e-switch
  • USB-C charging works well
  • Great “out the front” brother to the HD20

What I don’t like

  • Shorty tube isn’t included
  • Andúril PWM
  • Performance doesn’t hit claim on output (not even close to 3500 lumens)
  • Throw specification is not nearly met, either.

Parting Shot

Check out this spoopy sticker by PhotonPhreaks!

Wurkkos TS21 Anduril Flashlight spoopy PhotonPhreaks sticker


  • This content originally appeared at zeroair.org.  Please visit there for the best experience!
  • For flashlight-related patches, stickers, and gear, head over to PhotonPhreaks.com!
  • Use my amazon.com referral link if you’re willing to help support making more reviews like this one!
  • Please support me on Patreon!  Feeding flashlights is expensive!  And funding Fun Fund Friday even more so.  I deeply appreciate your support!
Liked it? Take a second to support zeroair on Patreon!
Become a patron at Patreon!

4 thoughts on “Wurkkos TS21 Andúril Flashlight Review”

  1. Leonardo Da Silva

    I love the looks on this light and the high CRI cct, but that performance is truly disappointing!

    1. Yes, but high CRI always equates to lower output. The flip side is that the lower output is more usable than the higher output of it’s low CRI brethren.

  2. Your UI section got doubled (under the led and beam heading) and you refer to it as the hd20 in a spot, and you mention a 5100 lumen claim accidentally. Just heads up!

    1. Thanks! I fixed those errors. I had done some editing and got paste-happy, it seems! Thanks again!

Leave a Reply

%d bloggers like this: