Fenix TK15R Reference Manual and SpecificationsUpdated 2 hours ago

The Fenix TK15R is an adaptive control tactical flashlight. This summary is drawn from the manufacturer's official user manual — see the downloadable PDF reference manual on the product page for complete details.

Warning

Do not look directly at the light source, stare at the light spot, or shine the flashlight directly into the eyes of anyone.
Do not disassemble this flashlight unless you are a professional.
Do not place this flashlight within reach of children.
Do not place the light head near flammable objects; high temperatures can cause objects to overheat and become flammable/ignite.
Do not use this flashlight in inappropriate ways such as holding the unit in your mouth — doing so could cause serious personal injury or death if the light or internal battery fails.
This flashlight will accumulate a significant amount of heat while operating, resulting in a high temperature of the light shell. Pay close attention to avoid burns.
Turn off and lock the flashlight, or remove the battery, to prevent accidental activation when the flashlight is placed in a closed, flammable environment such as pockets and backpacks.
The LED of this flashlight is not replaceable; the whole flashlight should be replaced when the LED reaches the end of its lifespan.

Product Features

3200 lumens maximum output, 490 meters maximum beam distance
Utilizes one Luminus SFT70 LED
Powered by an included ARB-L21-5000 V2.0 battery
USB Type-C charging port
Integrated tactical toggle switch for mode switching, and a functional switch for output selection and instant strobe
Tactical tail switch for momentary-on and constant-on
Battery level indicator in the functional switch
Made of durable A6061-T6 aluminum alloy, with a hard-anodized light body and titanium-coated body clip
Size: 5.87'' x 1.34'' x 1.00'' / 149 x 34 x 25.4 mm. Weight: 7.25 oz / 205.5 g (including battery)

Operating Instructions

On/Off: with the light unlocked, tap the tactical tail switch to momentarily turn on the light, or fully press it to constantly turn on the light. With the light on, fully press the tactical tail switch to turn it off, or rotate the toggle switch to the middle to enter Lockout mode and turn off the light. With the light locked and the tactical tail switch in the ON position, the battery level indicator will light up and show the battery level constantly; rotate the toggle switch clockwise to the end to enter IRIS X mode, or anticlockwise to the end to enter Duty mode. If the tactical tail switch is in the OFF position while locked, the toggle switch and the functional switch are disabled.

Output Selection: in Duty mode, single click the functional switch to cycle through Low, Med, High, and Turbo. In IRIS X mode, single click the functional switch to select between IRIS X and Low.

Intelligent Memory Circuit: the flashlight automatically memorizes the last selected output (excluding Strobe and IRIS X). When turned on again in Duty mode, the last selected output is recalled; when turned on again in IRIS X mode, the flashlight always activates in IRIS X output.

Mode Switching: rotate the toggle switch to cycle through IRIS X mode, Lockout mode, and Duty mode. With the light turned on and unlocked, press and hold the functional switch for 0.5 seconds to enter Strobe; single click the functional switch to exit Strobe, or fully press the tactical tail switch to turn off the flashlight.

IRIS X Mode: a light sensor module integrated within the flashlight's reflector, aligned with the beam direction, automatically adjusts brightness based on ambient lighting to avoid glare from reflections — protecting the user's eyes and improving search effectiveness. When incident light is below 5 lux (e.g. dark wilderness), the flashlight operates at maximum output (within thermal limits). At 70 lux (e.g. a large, dim basement), output is approximately 1500 lumens. At 100 lux (e.g. a normal office), output is approximately 800 lumens. When the illumination distance is as close as approximately 10 cm (e.g. for reading), output is reduced to approximately 30 lumens.

Other Operation: when the tactical tail switch is in the ON position and the toggle switch is in the locked position, the battery level indicator lights up to show the current battery status, reminding users the tactical tail switch is currently on.

Technical Parameters (ANSI/PLATO FL1) — Duty Mode

Turbo: Output 3200 lumens, Runtime 2 h 30 min*, Distance 490 meters, Intensity 61,000 cd.
High: Output 1000 lumens, Runtime 3 h 30 min, Distance 275 meters, Intensity 18,970 cd.
Med: Output 350 lumens, Runtime 8 h 20 min, Distance 160 meters, Intensity 6,500 cd.
Low: Output 30 lumens, Runtime 68 h 20 min, Distance 45 meters, Intensity 540 cd.

Technical Parameters — IRIS X Mode

IRIS X: Output 2000-3000 lumens (adaptive).
Low: Output 150 lumens, Runtime 19 h 30 min, Distance 100 meters, Intensity 2,800 cd.

Strobe: 2500 lumens.

Impact Resistance: 1 meter | Water Resistant: IP68

Note: according to the ANSI/PLATO FL1 standard, the above specifications are from the results produced by Fenix through its laboratory testing using one Fenix ARB-L21-5000 V2.0 battery under the temperature of 21±3°C and humidity of 50%-80%; the true performance of this product may vary according to different working environments and the actual battery used. *The Turbo output is measured in total of runtime including output at reduced levels due to temperature or the protection mechanism in the design.

Battery Specifications

Fenix ARB-L21-5000 V2.0 (21700, 3.6V): Recommended.
Fenix ARB-L21-6000 (21700, 3.6V): Recommended.
Fenix ARB-L21-6000B (21700, 3.6V): Recommended.
Fenix ARB-L21-5000U (21700, 3.6V): Recommended.
Fenix ARB-L21-4000P (21700, 3.6V): Recommended.

Do not use an 18650, CR123A, or 16340 battery. 21700 Li-ion batteries are powerful cells designed for commercial applications and must be treated with caution and handled with care. Using low-quality batteries or mishandling batteries (such as short-circuiting or overheating) could lead to combustion and jeopardize the safety of users and property; any adverse effects from low-quality batteries are not covered by any Fenix warranty or liability. Using quality batteries with circuit protection will reduce the potential for combustion or explosion.

Battery Replacement: unscrew the light head and insert the battery with the anode side (+) towards the light head, then screw the light head back on.

Charging

Open the anti-dust plug to reveal the USB Type-C charging port, then connect the USB Type-C end of the charging cable to the flashlight.
The indicator will display red while charging and will turn green when fully charged.
With the light turned off, the normal charging time of the Fenix ARB-L21-5000 V2.0 battery is approximately 1.5 hours from depleted to fully charged with a 9V/3A charging adapter.
Power specifications: Charging voltage 5V/9V; Charging power 5W (5V/1A) to 21W (9V/2.3A). This flashlight supports fast charging.
Only use a certified USB charging adapter that complies with the government safety standards of the country or region where this product is sold.

Note: recharge a stored flashlight every four months to maintain optimum battery performance.

Battery Level Indication

Tap or fully press the tactical tail switch to turn on the flashlight and the indicator will show the current battery level.

Green light on: saturated, 100% - 85%.
Green light flashes: sufficient, 85% - 50%.
Red light on: poor, 50% - 25%.
Red light flashes: critical, 25% - 1%.

*This only works with a Fenix ARB-L21 series 21700 rechargeable battery.

Low-Voltage Warning

When the voltage level drops below the preset level, the flashlight is programmed to gradually reduce the brightness level. When the voltage level is still too low, the battery level indicator blinks red to remind users to recharge or replace the battery in a timely manner until the battery runs out. This only works with a Fenix ARB-L21 series 21700 rechargeable battery.

Intelligent Overheat Protection

The flashlight will accumulate a lot of heat when used at high output levels for extended periods. When the flashlight reaches a temperature of 55°C/131°F or above, it will automatically step down a few lumens to reduce the temperature. When the temperature drops below 55°C/131°F, the flashlight will gradually recall the preset output level.

Usage and Maintenance

Disassembling the sealed head can cause damage to the flashlight and will void the warranty.
Fenix recommends using an excellent-quality battery.
If the flashlight will not be used for an extended period, remove the battery, or the light could be damaged by electrolyte leakage.
Lock the flashlight or take out 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 flashlight and battery contacts improves the flashlight's performance, since dirty contacts may cause flickering, intermittent operation, or failure to illuminate.

What's Included

Fenix TK15R flashlight, ARB-L21-5000 V2.0 battery, USB-A to USB-C charging cable, Holster, Lanyard, Spare O-ring, User manual, Warranty card.

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