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Fenix TK20R V2.0 Review 2023

Even after using multiple Fenix flashlights, testing a new Fenix product is always exciting for me. And after using the TK20R V2.0 for more than a month in various conditions I have found it to be a well-engineered flashlight.

This is a professional-grade tactical flashlight and an updated version of the TK20R. And as expected from the TK series, it delivers a longer throw and high output.

That said, there are a few things you need to know before going with the Fenix TK20R V2.0.

Without further ado, let’s dive into the review and check out the details.


Unboxing and Package Quality

The TK20R V2.0 is smartly packaged in an eye-catching black and orange cardboard package with the specs listed on the back. Inside the box, the flashlight and the accessories are packed in a hinged plastic carrier. You will find the following items in the box.

  • ARB-L21-5000 V2.0 Li-ion battery
  • USB Type-C charging cable
  • Holster
  • Lanyard
  • 2 x spare O-rings
  • User manual and warranty card
fenix tk20r

Build Quality

Honestly, it is hard to find flaws in the build quality of Fenix flashlights. The same goes for the TK20R. It is built for outdoor lovers and the black finish looks and feels premium. 

The aluminum body has a type HAIII hard-anodized anti-abrasive finish. An IP68 rating which makes it dustproof and waterproof further enhances the ruggedness.

The finishing of the TK20R is flawless with smooth edges and zero blemishes. The center of the flashlight has concentric knurling and this helps in getting a good grip, even in wet conditions. It comes with a dual-spring structure at the front and tail which helps to protect the light from impacts. 

This also means you can use the crenulated bezel of this tactical flashlight as a weapon for self-defense or for breaking a window. The bottom of the light has dual protruding switches, so don’t expect it to tail stand.

One cool feature is the retractable aluminum cover of the USB charging port that can be unscrewed as needed. Personally, I find this mechanism more durable than silicone rubber flaps. The threaded collar is super smooth and there is no chance of it catching on to something.

Attached to the rear of the flashlight, is the pocket clip which looks narrow at first glance. However, the clip is robust and does a good job of fixing the flashlight to a jeans pocket. The charging cable feels durable, but admittedly, I missed the convenience of the magnetic charging cable from the Olight Warrior 3.

tk20r tail switch

The Fenix TK20R V2.0 in Use: How to Operate

The two-button interface of the light is simple to use. The larger round switch is the tactical switch that turns the light on. The oval switch is the function switch that allows you to cycle through the 5 brightness levels and strobe.

The flashlight has an intelligent memory mode that turns it on in the last used setting excluding strobe. You can directly enter strobe mode by pressing the functional switch even when the light is switched off. There is no lockout function though. You can unscrew the tail to prevent accidental activation.

Both tactical tail switches have a great tactile feel and even when you are wearing gloves, operating them isn’t an issue. Then again, some tactical users may feel the lack of an instant Turbo mode. 

The TK20R is compatible with the Fenix AER-04 tactical remote switch. You can also mount it to a rifle by using the Fenix ALG-16 M-Lok rail mount.

Interestingly, the battery level indicator is under the USB cover. Considering the minimalistic design of the light, this works well. But that takes away the ability to check out the battery level at a glance when you turn the light on. You get the usual green and red light combination that indicates high and low battery levels.


Runtime and Modes

Here is a look at the 5 lighting modes and the instant strobe.

Mode  Output in lumens Runtime
Eco 30 48 hours
Low 150 21 hours 20 min
Medium 350 7 hours
High  1000 3 hours 10 min
Turbo 3000 2 hours 50 min
Strobe 3000


The highlight of the TK20R V2.0 is the excellent Turbo output of 3000 lumens along with a great runtime. The maximum beam distance is an impressive 1558 feet (475 meters) in turbo mode. The Eco mode is a practical feature for extending the battery life.

Fenix has used an intelligent overheat protection that will drop the output when the temperature reaches 60°C. However, you can expect a step down to High mode within 50 seconds of operating in Turbo. Considering that this is a tactical light, I would have liked the initial runtime to last longer than a minute. That said, 40-50 seconds isn’t bad at all.

So, the real runtime with a 3000-lumen output is much less than the specified 2 hours and 50 minutes. I wish companies would start mentioning the actual Turbo runtime with the highest output in the flashlight specs.

Even though the light gets hot quickly, the thermal regulation does a good job and it never feels frying-pan hot. Once the temperature drops, you can reselect Turbo to increase the output.

tk20r flashlight specs

Key Features

Battery Fenix ARB-L21-5000 rechargeable Li-ion battery.
Lamp Type Luminus SFT70 LED
Max Run Time 48 hours
Peak Light Output 3000 lumens
Material A6061-T6 aluminum
Charging Time 3 – 3.5 hours
On/Off Tail Switch
Max Beam Distance 1558 feet (475 meters)
Origin China


A practical safety feature of the Fenix TK20R V2.0 is a low-voltage warning. In case the voltage level drops below a preset value, the light will step down to a lower mode. As a warning, the light will blink 3 times every 5 minutes in Eco mode. 

Beyond that, it also has the Advanced Pulse-Frequency (APF) Transmission System- a proprietary technology from Fenix Lighting. This allows for higher lumen outputs and a lighter single-layer flashlight body. It also allows Fenix to make better use of multi-functional tail switches.



In case of manufacturing defects, Fenix will replace the flashlight within 15 days of purchase. For any problems resulting from normal use, Fenix will repair the flashlight for free, for a period of five years. Beyond that, you will get lifetime maintenance, but there will be separate charges for replaced components.


Dimensions and Weight

The dimensions of the Fenix TK16 V2.0 are listed below.


Length- 6.02 inches (153 mm)

Head Diameter- 1.34 inches (34 mm)

Body Diameter- 1 inch (25.4 mm)

Weight- 7.2 oz (204 g) including battery


In terms of size, the flashlight will fit into a jeans pocket. However, it is longer than a typical EDC flashlight and not the best choice if you are looking for compact options. Don’t expect it to substitute a headlamp either. 

In smaller pockets, you might find the tail end of the light sticking out. The Fenix PD36R and the Fenix PD35 V3.0 are more discreet choices in that regard.

That doesn’t mean the TK20R V2.0 is oversized. It has a great in-hand feel and the clip is perfectly proportioned to the length. The weight is on the heavier side, but it gives the flashlight a hefty feel.

fenix charging type c


The TK20R V2.0 is a rechargeable flashlight with a 21700-size 5000 mAh lithium-ion battery. This Fenix battery delivers better performance than 18650 batteries without adding much to the weight. The battery doesn’t have an in-built charging port. So, you need to place it inside the flashlight for charging through the USB cable or use an external charger.

The light also supports the ARB-L21-5000U and ARB-L21-4000P batteries from Fenix. Note, Fenix forbids the use of 18650, 16340, or CR123A batteries. The battery life is good and matches the specs. You can expect a charging time of around 3.5 hours.



The Fenix TK20R V2.0 is available at a price of $130. While it has some great features, this is a sizable investment. Unless you need the high lumen output and the long-distance throw, there are cheaper options.

Note, the Fenix TK16 V2.0 offers a turbo output of 3100 lumens and a similar runtime. Besides, it is also a smaller and cheaper flashlight. If you want similar lumen power at a lower price tag, check that out. 

And in case 3000 lumens is overkill for you, you can check out the Fenix PD35 V3.0. It is an affordable flashlight with a max output of 1700 lumens. 


Beam Shots

The Luminus SFT70 emitter delivers a cool white beam, which is understandable for a tactical flashlight. The hotspot is not sharp, but the beam has a decent and even spill with a well-defined outer edge. In Turbo mode, most of the lumens are packed into the hotspot which enhances the throw distance, reducing the spill.

The larger hotspot makes it useful as a searchlight for rescue operations and also for law enforcement teams. In fact, the beam pattern is similar to the Fenix PD40R LED flashlight which uses the same emitter.

If you are looking for a consistent light output, the TK20R V2.0 delivers.  Even so, the Fenix TK16 V2.0 Tac flashlight can be a good option for those who need a broader range of light for outdoor use.


  • Top-notch durability
  • User-friendly interface
  • Long distance throw
  • Excellent thermal management


  • It can’t tail stand
  • Short runtime with peak output


Fenix TK20R V2.0: FAQs

How many lumens does the Fenix TK20R V2.0 have?

The max lumen output is 3000.

What is the Fenix TK20R best used for?

The TK20R V2.0 is best used for outdoor activities, home security, patrolling, and search & rescue.

What is the difference between the Fenix TK20R V2.0 and the Fenix TK20R UE?

The TK20R UE comes with a slightly lower max output and beam distance of 2800 lumens and  508 yards. It also has a unique toggle tail switch for smooth operation.

What is the color temperature of the Fenix TK20R V2.0?

In Turbo mode the color temperature is around 6500K.


Final Thoughts

If you want a USB rechargeable tactical flashlight for self-defense and home security, the Fenix TK20R V2.0 is a good choice. It is definitely one of the best flashlights for tactical use from the Fenix stable without too many shortcomings. On top of that, you get excellent throw and brightness, along with great attention to detail that we expect from Fenix.

Even so, I’d suggest that you check out the best tactical flashlights on the market before picking the TK20R V2.0.

Unless you are on a tighter budget or prefer a smaller flashlight, I will recommend the Fenix TK20R V2.0 without hesitation.

whats included fenix tk20r

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