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Fenix TK11R Rechargeable Tactical Flashlight

$116.00 $86.95

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Max Lumens:


18650 or CR123A
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SKU: TK11RXBKN/ABarcode: 6942870310183N/A

Product Overview

The Fenix TK11R Rechargeable Tactical Flashlight delivers a powerful 1600-lumen beam that reaches 1378 feet (420m). Dual tail switches provide quick and easy access to three brightness levels and a strobe mode. This flashlight is powered by an included single 18650 Li-ion battery, or two CR123A batteries can be used as a backup power source. Check on the battery's status with the battery level indicator and recharge the light via the USB Type-C port. Impact-resistant and IP68-rated dust/waterproof round out the features that make the TK11R an affordable tactical performer.


Max Lumens: 1600
Max Beam Distance: 1378 feet (420 meters)
Max Runtime: 25 hours 30 minutes
Lighting Modes: Four modes including three brightness levels and strobe
Bulb Type: Luminus SFT40 LED
Size: Length: 5.73” (145.5mm) Head: 1.34” (34mm) Body: 0.93” (23.5mm)
Weight: 4.14 oz. (117.5g) excluding battery
Battery: One included 18650 rechargeable Li-ion battery or two CR123As
Included: ARB-L18-3400 battery, USB Type-C charging cable, lanyard, holster, spare O-ring
Warranty: Limited Lifetime Guarantee from Fenix Lighting USA

More Information

  • Uses one Luminus SFT40 LED with a lifespan of 50,000 hours.
  • Powered by one Fenix ARB-L18-3400 battery.
  • Inner waterproof USB Type-C charging port.
  • Instant strobe.
  • Intelligent memory remembers the last brightness level used.
  • Dual tail switches for fast, single-handed operation.
  • Made of durable A6061-T6 aluminum.
  • Premium type HAIII hard-anodized anti-abrasive finish.
Fenix TK11R Rechargeable Tactical Flashlight specs chart


Fenix TK11R Rechargeable Tactical Flashlight runtime chart


Tap the tactical switch to instantly turn on the light, release and the light will go out. Fully press the tactical switch to constantly turn on the light, fully press again to turn off the flashlight.


Output Selection 

With the light switched on, single click the functional switch to cycle through Low→Med→High.



With the light switched off, press the functional switch to enter strobe, release the light will go out.

With the light switched on, press and hold the functional switch for 0.5 seconds to enter the strobe mode, click the functional switch once again to turn back to the previously used output or fully press the tactical switch to turn the flashlight off.


Intelligent Memory Circuit

The light memorizes the last selected output excluding strobe. When turned on again the previously used output will be recalled.


Battery Specifications



Nominal Voltage



Fenix ARB-L18


3.6 V



Non-rechargeable Battery (Lithium)


3.0 V


Other types of Li-ion battery


3.6 V



*18650 Li-ion batteries are powerful cells designed for commercial applications and must be treated with caution and handled with care. Only using quality batteries with circuit protection will reduce the potential for combustion or explosion. Cell abuse or short circuiting are considered user induced damage and are not covered by any Fenix warranty or liability.


Battery Replacement

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



  1. First switch off the light and plug the USB A socket of the charging cable into an appropriate A/C powered USB plug/outlet, then connect the USB Type-C socket of the charging cable to the light. 
  2. The indicator will display red while charging, and will turn to green when fully charged. 
  3. Once charging is completed, be sure to unplug the charging cable and close the anti-dust cover. 


  1. When charging fails or the battery is inserted backwards, the battery indicator will flash red or stop working to notify the user to check the battery condition.
  2. The normal charging time of the flashlight is approximately 3.5 hours from depletion to fully charged.
  3. Recharge a stored light every four months to maintain the optimum performance of the battery.
  4. If the battery level indicator blinks or fails to operate, please check out the battery. It is strictly prohibited to charge a CR123A or a 16340 battery. 

Note: These features only work with a Fenix ARB-L18  battery.


Battery level indication

Each time the light is turned on, the indicator will indicate the battery level and will last for 3 seconds.

Green light on: saturated 100% - 85%

Green light flashes: sufficient 85% - 50%

Red light on: poor 50% - 25%

Red light flashes: critical 25% - 1%

Note: This feature only works with a Fenix ARB-L18  battery.


Intelligent Overheat Protection            

The lamp will accumulate a lot of heat when used at high output levels for extended periods. When the light reaches a temperature of 65°C/149°F or above, the light will automatically step down a few lumens to reduce the temperature. When the temperature drops below 65°C/149°F, it will then allow the user to select these heat intensive modes again. 


Low-voltage Warning

When the voltage level drops below the preset level, the lamp is programmed to downshift to a lower brightness level until Low output is reached. When this happens in Low output, the battery level indicator blinks red to remind you to replace or recharge the battery. 

Note: This feature only works with a Fenix ARB-L18 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.
  • 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: Poor battery level.
    Solution: Replace or recharge the battery (Ensure the 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.



  • Do NOT place this flashlight in the reach of children!
  • Do NOT shine the flashlight directly into the eyes of anyone!
  • Do NOT place light head near flammable objects as high temperatures can cause objects to overheat and become flammable/ignite!
  • Do NOT use the flashlight in inappropriate ways such as holding the unit in your mouth. If the battery were to fail while doing so death or serious injury could result.
  • This flashlight will accumulate a lot of heat while operating, resulting in a high temperature of the flashlights outer case. Pay close attention to the thermal condition of the flashlight to avoid burns.
  • Remove the battery from the flashlight to prevent accidental activation when the flashlight is placed in a closed-in and flammable environment such as pockets and backpacks!
  • The LED of this flashlight is not replaceable; so the whole flashlight will need to be replaced when the LED reaches the end of its lifespan.

What is the product positioning of TK11R? What are the typical usage scenarios?

A: Fenix TK11 is a compact tactical and duty flashlight. This flashlight is suitable for various activities such as searching, patrolling, and law enforcement.


What are the key features of TK11R?


1)Simple and rapid output selection.

2)High performance and impressive output.

3)USB Type-C charging.

4)This flashlight comes with a Fenix ARB-L18-3400 battery.


What kind of LED is used in TK11R? Does Fenix offer to replace LED? 

A: One Luminus SFT40 cold white LED with a lifespan of 50,000 hours.

Fenix does not provide LED replacement services for the time being, and users are not recommended to replace the LEDs independently, which may affect product performance and cause product damage.


What is the working voltage of TK11R?

A: The operating voltage is 3.0 V-4.2 V.


What kind of battery can be used in TK11R?

A: It is recommended to use a Fenix 18650 Li-ion battery. Other Li-ion batteries are not recommended. As an unmatched battery may cause the flashlight to fail to work normally.


Is the TK11R internally waterproof?

A. Yes, the light is internally waterproof and is thus still waterproof without the port cover in place.


How to prevent accidental activation of the TK11R?

A: Unscrew the light tail, or remove the battery to prevent accidental activation.


What are the optional accessories for TK11R?


AER-05 Remote Pressure Switch, ALG-05 Tactical remote pressure switch mount, ALG-06 Tactical Remote Pressure Switch Mount, ALG-00 Rail mount, ALG-15 Rail Mount, ALG-16 M-LOK Quick-release Rail Mount, AOD-M Diffuser Tip, AOT-M Traffic wand, AOF-M Filter adapter


Why does the TK11R downshift to a lower mode after being used for a while and the higher mode cannot be selected?

A: There are two possible reasons:

1. Intelligent Overheat Protection

The flashlight will accumulate a lot of heat when used at high output levels for extended periods. When the light reaches a temperature of 65°C or above, the light will automatically step down a few lumens to reduce the temperature. 


2. Low-voltage Warning

When the voltage level drops below the preset level, the flashlight is programmed to downshift to a lower brightness level until the Low mode is reached. 


What is the APF?

A: The APF (Advanced Pulse-Frequency Transmission System) was developed by Fenix laboratory, a major technology breakthrough of flashlight industry. Allowing the tactical flashlight achieve a higher level of performance:

  1. Take light to the extreme. Traditional forward switches are limited by current, and it is difficult to achieve brightness above 2000 lumens. In the age of 21700 batteries gradually expanding, 3000 lumens tactical flashlights are almost impossible; while the flashlight using APF technology can.
  2. Make the functional tail cap simpler. Traditional multi-function tail cap needs to achieve functional through the double-layer body or additional channels ; and the flashlight using APF technology offering a strong reliable flashlight in simple structure, we talking about single layer body if specifically.
  3. Better anti-interference performance. Complex external environments such as strong magnetic fields are easily dealt through stronger anti-interference ability.

Why does the TK11R happen to flicker?

A: The possible reasons that may cause the light to flicker, shine intermittently or even fail to illuminate:

1. Poor battery level.

Solution: Recharge or replace the battery.

2. The contact or contact point of the battery or flashlight is 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.

Product Videos

Customer Reviews

Based on 4 reviews

Great product

Not worth it

Dropped it from maybe 4 feet won't turn on haven't had it or used it much its only cheap in quality not price

Did you contact warranty about that? 888-775-9996 ext 1, warranty@fenixlighting.com

Daniel Tourigny
Great light

I wish all the pd35 had the same tail cap.

William Eyvaz

Fenix TK11R Rechargeable Tactical Flashlight

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