Fenix TK21 Review

Written by Kevin Webb

Fenix TK21 Review (Video & Photos Below)

Thank you for taking the time to check out my Fenix TK21 review. The Fenix TK21 is an outstanding flashlight for a great price ($95). The Fenix TK21, which is the big brother to the Fenix TK15, uses the new XM-L U2 LED bulb that has a max output of 468 lumens, a max run time of 220 hours on low, and a 214 meter beam distance. The digitally regulated output allows for the TK21 to maintain a constant and consistent brightness. The TK series stands for “Tank” and its durable aircraft-grade aluminum and premium Type III hard-anodized anti-abrasive finish offers ridig impact resistance, and water resistance to IPX-8 standard.

The Fenix TK21 only has one downside for me personally – it doesn’t tail stand for candle light. The rear push button on the tail sticks out about 1 centimeter from the aluminum housing which disallows the TK21 from standing on its end. It’s possible that the rubber switch boot could be shaved to allow the TK21 to tail stand, but I haven’t investigated the design thoroughly enough yet.

There are a lot of great flashlight brands out there, but for the price, Fenix is, in my opinion, the best value. Surefire is one of the leading names in flashlights, similar to Jordan and basketball shoes, but Surefire’s closest comparison to the Fenix TK21 is their P2X Fury™, which is $60 more than the TK21, only has two modes, only has a max run time of 15 hours compared to the TK21’s 220 hour max run time, doesn’t offer mode memory, doesn’t have buffer springs for mounting on a weapon, and doesn’t offer a strobe option. The Surefire’s P2X Fury™ does not tail stand either.

Fenix TK21 24 Month Warranty

Fenix offers a 24 month warranty on the TK21. You will receive a warranty card inside the package which you will need to fill out. Make sure you save your receipt, and be sure to register the warranty online as well.

Fenix TK21 Review Video

Fenix TK21 Photos

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Fenix TK21 Specs

Price: $95
Max Lifespan: 50000 Hours
Max Output: 468 Lumens
Max Runtime: 220 Hours
Adjusting Levels: 5 Levels
Switch Type: Push-Button Tail Cap
Battery Type: 2xCR123A or 1×18650
Operation Modes: General, Turbo, Strobe
LED Type: Cree XM-L (U2) LED
Aircraft-Grade Aluminum
Size: 150mm (L) x 25.4mm (D) x 40mm (Head)
Weight: 152.6 Grams (excluding batteries)


Fenix TK21 Light Modes & Lumens

Low (5 Lumens): 220 Hours
Medium (58 Lumens): 16 Hours
High (180 Lumens): 5 Hours 10 Minutes
Turbo (468 Lumens): 1 Hour 55 Minutes
Strobe (468 Lumens): Unknown


Fenix TK21 Features

Output Technology: Digitally Regulated Output – Maintains Constant Brightness
Construction: Durable Aircraft-Grade Aluminum
Finish: Type III Hard-Anodized Anti-Abrasive Finish
Waterproof: IPX-8 Standard
Design: Anti-Roll, Slip-Resistant Body Design


What’s In the Box?

Spare O-Rings
Rubber Switch Boot
2- Year Warrant Instructions


You can view a more detailed review here.

About the author

Kevin Webb

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