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Fenix TK11 TAC Tactical Flashlight - DISCONTINUED

$98.00 $74.95

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Max Lumens:


18650 or CR123A
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SKU: TK11TKBKN/ABarcode: 6942870307473N/A

Product Overview

The Fenix TK11 TAC is a flashlight designed with the tactical user in mind. The flashlight’s two operating modes were designed to support the law enforcement and security markets specifically. The unique design features a toggle tail switch which allows you to quickly switch between Tactical Mode, which limits the light to only the highest brightness level and strobe for tactical situations, or Duty Mode which accesses all lighting modes for on-duty demands.

Powered by a 18650 battery or disposable CR123As (no batteries are included), this flashlight’s balanced beam can throw a maximum 1600 lumens a long reaching 1099ft (335m). Tough and reliable, the TK11 TAC is impact resistant and has an IP68 rating making it dustproof and waterproof.


Max Lumens: 1600
Max Beam Distance: 1099 feet (335 meters)
Max Runtime: 47 hours 30 min
Lighting Modes: 3 brightness levels, and strobe
Bulb Type: Luminus SST40 LED
Size: Length: 5.51” (140mm) Head: 1.34” (34mm) Body: 0.93” (23.5mm)
Weight: 4.02 oz. (114g) excluding battery
Battery: One 18650 Li-ion rechargeable battery or two CR123A lithium batteries (batteries not included)
Included: Holster, spare O-ring
Warranty: Limited Lifetime Guarantee from Fenix Lighting USA

More Information

Additional Features of the TK11 Tactical Flashlight

  • Luminus SST40 LED with a lifespan of 50,000 hours.
  • Tactical and Duty modes for flexibly needed choice and operation.
  • Patented dual-function tactical switch for instantly tactical activation.
  • Single-handed toggle switch for mode selection.
  • Lockout function avoids accidental activation.
  • Made of durable A6061-T6 aluminum.
  • Premium type HAIII hard-anodized anti-abrasive finish.
Fenix TK11 TAC Tactical Flashlight - DISCONTINUED specs chart


Fenix TK11 TAC Tactical Flashlight - DISCONTINUED runtime chart


With the light unlocked and switched off, tap the tactical tail switch to momentarily turn on the light, release it the light will go out, fully press the tactical tail switch to constantly turn on the light, fully press again to turn off the light.


Mode Switching on the TK11 Tactical Flashlight

In any state, rotate the toggle switch to select the needed mode, rotate the toggle switch clockwise to the end to enter tactical mode, rotate the toggle switch counter-clockwise to the end to enter Duty mode, to the middle to enter Lockout mode.


Output Selection

Tactical Mode 

Tap the tactical tail switch to momentarily turn on the light, fully press the tactical tail switch to lock the light on High output level. Press and hold the tactical tail switch for 0.8 seconds to enter Strobe, tap the tactical tail switch to turn back to High output level. Fully press the tactical tail switch to turn off the light.


Duty Mode

Tap the tactical tail switch to cycle through Low→Med→High, fully press the tactical tail switch to lock the output level, tap again to cycle the output levels (with intelligent memory circuit). Press and hold the tactical tail switch for 0.8 seconds to enter Strobe, tap the tactical tail switch to return to the previously used output level. Fully press the tactical tail switch to turn off the light.


Instant Strobe

In Tactical or Duty mode, press and hold the tactical tail switch for 0.8 seconds to enter Strobe, fully press the tactical tail switch again to exit Strobe.




With the light switched on, rotate the toggle switch to the middle position to lock the chosen output level, at this time, the tactical switch does not work and the output levels can not be selected. With the light switched off, rotate the toggle switch to the middle position to lock the tactical tail switch, at this time, the tactical tail switch does not work and the light can not be turned on.


Unlock the TK11 Tactical Flashlight

Rotate the toggle switch to Tactical mode OR Duty mode to unlock the light.


Battery Specifications

TypeDimensionNominal VoltageUsability 
Rechargeable Battery (Li-ion)*186503.6VRecommended√√
Non-rechargeable Battery (Lithium)CR123A3.0VUsable

Warning: *18650 Li-ion batteries are powerful cells designed for commercial applications and must be treated with caution and handled with care. Only use quality batteries with circuit protection will reduce the potential for combustion or explosion; but cell damage or short circuiting are potential risks the user assumes.


Battery Replacement

Unscrew the tail cap to insert the battery with the anode side (+) towards the light head, then screw the tail cap back on.


Intelligent Overheat Protection

The light will accumulate a lot of heat when used on High output level for extended periods. When the light reaches a temperature of 60°C or above, the light will automatically step down a few lumens to reduce the temperature. When the temperature drops below 60°C, it will then allow the user for the reselection of High mode.


Low-voltage Warning on the TK11 Tactical Flashlight

When the voltage level drops below the preset level, the flashlight is programmed to downshift to a lower brightness level until Low output is reached. When this happens in Low output, the light blinks 3 times every 5 minutes to remind you to recharge or replace the battery. 


Note: This only works with Fenix ARB-L18 Series 18650 rechargeable Li-ion battery.


Usage and Maintenance

  • Disassembling the sealed head can cause damage to the light and will void the warranty.
  • Fenix recommends using an excellent quality battery.
  • If the light will not be used for an extended period, remove the battery, or the light could be damaged by electrolyte leakage or battery explosion.
  • Lock the light or remove the battery to prevent accidental activation during storage or transportation.
  • Long-term use can result in O-ring wear. To maintain a proper water seal, replace the ring with an approved spare.
  • Periodic cleaning of the battery contacts improves the lamp's performance as dirty contacts may cause the lamp to flicker, shine intermittently or even fail to illuminate for the following reasons: 
    A: The battery needs replacing. 
    Solution: Replace battery pack /battery (Ensure battery is inserted according to the manufacturer’s specifications). 
    B: The threads, PCB board contact or other contacts are dirty. 
    Solution: Clean the contact points with a cotton swab soaked in rubbing alcohol.

If the above methods don't work, please contact your authorized distributor.



  • This flashlight is a high-intensity lighting device capable of causing eye damage to the user or others. Avoid shining the flashlight directly into anyone's eyes.
  • This flashlight will accumulate a lot of heat when used for extended periods, resulting in high temperature of the flashlight shell. Pay attention to safe use to avoid scalding.
  • All information provided in this manual is subject to change without prior notice.

Q1.  What is the APF? 

A: The APF (Advanced Pulse-frequency Transmission System) was developed by Fenix Laboratory for producing better flashlights. It has abandoned the traditional development way, breaking through the technology bottleneck, allowing flashlight with a tail switch to achieve a higher level of performance: 

1. Higher output: the APF system has made higher lumens from a forward switch possible, it breaks the limitation of current.   

2. Simpler multi-functional tail switch: this APF technology can transmit various signal commands through a single layer within the light body. Traditional signal transmission requires a multi-layer system. Thanks to this new single-layer system, the light size can be greatly reduced and the structure will be more compact. 

3. Better anti-interference performance: the APF system combats signal interference, but it doesn't work if it is applied to a magnetic switch. Therefore, the TK11 TAC will be less prone to interference based on the use of a mechanical switch.  


Q2.  What should I do if the TK11 TAC needs repair?

A: 1. 15-day replacement: Fenix will replace identical or equal products with documented manufacturing defects within 15 days of purchase.

2. 2-year free repair: Fenix will repair a light free of charge within 2 years of purchase if problems develop with normal use.

3. Lifetime maintenance: If repair is required after 2 years from the date of purchase, Fenix will charge for parts. The total repair fee is dictated by the cost of the replaced materials.

4. If you need warranty service, fill out the warranty form at https://www.fenixlighting.com/pages/warranty-repairs to start your repair claim.

Product Videos

Customer Reviews

Based on 32 reviews
Thomas Rogers

My second, in addition to my first, great light!

French, Mark

Works nice as a weapons light.

Domaine Tisdale

Powerfully bright light and the adjustability is very useful when needed. Great build quality for a reasonable price.

Fred Harris

Fenix manufacturers great flashlights. I started with a PD30 around 10 years ago and still works great. Now have seven Fenix flashlights, and the TK11 is my new favorite.

Sheldon Katz

Very powerful small flashlight. Very happy with purchase but would be happier if the flashlight had a lanyard to wrap around my wrist.

David Baugh

So far this light works great as a weapons light when used with the AER-02 pressure switch. If this combination holds up I'll be changing all of my rifle lights over to Fenix setups.

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