The Fenix TK25R is a top-class tactical flashlight that offers high performance and versatile use thanks to the combination of a main and side reflector. The main reflector with a premium Cree XHP50.3 LED provides a luminous flux of up to 3600 lumens with a beam distance of 350 meters. A unique feature of this model is the integrated side light, which features diffused white, red, and ultraviolet light (365 nm) with a power of up to 700 mW, allowing for quick authentication of documents and banknotes, curing adhesives, or checking for liquid leaks. Furthermore, the side light is equipped with a red-blue flashing function, which will be especially appreciated by armed forces. Power is provided by a Li-ion battery type 21700 (Fenix ARB-L21-5000 V2.0) with a capacity of 5000 mAh, charged via a modern USB-C connector directly on the flashlight body. The body is made of durable A6061-T6 aluminum alloy with hard anodization and is fully waterproof and dustproof according to the IP68 standard.

The Fenix TK25R offers a total of five main reflector modes including a blinding strobe and six side light modes (including red light for preserving night vision). Control is provided by a tactical dual tail switch, which allows for momentary on, quick activation of turbo mode, and instant strobe activation. This ergonomics is ideal for crisis situations where light needs to be used quickly and without fumbling for buttons.

Thanks to its parameters, high durability, and police flashing function (red/blue), this flashlight is the perfect choice for police officers, rescue workers, firefighters, and security agencies. However, it will also find use among repairmen, technicians (thanks to the side work light) or demanding outdoor enthusiasts who require uncompromising quality.

All flashlight parameters (luminous flux, battery life, waterproofing, beam distance, and impact resistance) are measured in accordance with the ANSI/NEMA FL 1-2009 standard. 

Fenix TK25R Flashlight Parameters

  
• Uses a premium white Cree XHP50.3 LED, supplementary LEDs for side light, and a 365 nm UV LED, all with a lifespan of 50,000 hours.
  
• Five white light power modes: 3600 lumens (2 h 20 min) – 1000 lumens (3 h) – 350 lumens (7 hours) – 30 lumens (55 hours) – Strobe (3600 lumens). 
  
• Six side reflector modes: 150 lumens (5 hours) – 30 lumens (50 hours) – UV 365 nm (700 mW) – red 15 lumens (20 hours) – red flashing (15 lumens) – red and blue flashing (15 lumens).
  
• Luminous flux and runtime are measured with the included USB-C Li-ion 21700 battery with a capacity of 5000 mAh.
  
• Max battery diameter 22.0 mm, max battery length 77.0 mm.
  
• Electronics with digital constant regulation and intelligent overheat protection.
  
• Made of aerospace-grade hardened aluminum 6061-T6, the flashlight is impact-resistant to drops from 1 meter.
  
• Protection against accidental reverse battery insertion (reverse polarity).
  
• Durable surface - Type III hard anodized.
  
• Battery charge status indication.
  
• Charging USB-C connector on the flashlight body under a rubber cover.
  
• The flashlight has memory and always turns on in the last set mode (except for the highest mode).
  
• Waterproof and dustproof according to the IP68 standard.
  
• The reflector creates a well-focused light beam with a distance of 350 meters (28,000 cd).
  
• Flashlight dimensions: 16.4 cm (length) x 3.6 cm (reflector diameter) x 2.62 cm (body diameter).
  
• Weight 255 grams including battery.
  
• Included with the flashlight is a Fenix ARB-L21-5000 V2.0 battery, belt holster (textile), lanyard, USB-C charging cable, and spare O-ring.
  
• Optional original accessories include AOT-04 traffic wand, ALP-20 leather holster, ALC-03 flashlight holder,  Fenix ALD-05 helmet mount, Fenix bike mount, USB mains adapter and USB car adapter.

Using the Fenix TK25R Flashlight

From the factory, there may be an insulating cap inside the flashlight on the battery. Remove it before first use.

To turn on, press the main tactical switch at the end of the flashlight; for momentary activation, press it lightly. By pressing the secondary toggle button, you can then cycle through the lighting modes of the selected reflector. The 3600-lumen Turbo mode can also be activated directly at any time by holding the main tactical button for 0.5 seconds. To switch to strobe while the flashlight is on, hold the toggle button for 0.5 seconds. To turn the flashlight directly into strobe mode, press and hold the toggle button.

Switching between main and side reflector, lockout - Rotate the tail mechanical toggle to select the desired reflector. Rotating the toggle to the far left selects the main reflector, rotating to the far right selects the side reflector, and the middle position locks the flashlight. The locked flashlight does not respond to any operation of the dual tail switch.

Memory for last set power mode - The flashlight remembers the last used power mode within the selected reflector. It will activate in this mode the next time it is turned on (does not apply to Strobe).

Battery replacement - Unscrew the flashlight body and insert the battery with the positive (+) pole facing the reflector. Then tighten the body completely again.

Charging - Turn off the flashlight, lift the dust cover, and plug the USB-C charging cable into the charging port. After charging is complete, replace the dust cover. During charging, the indicator glows red; when fully charged, it turns green. The flashlight cannot be used during charging. If charging fails or the battery is inserted with reverse polarity, the indicator flashes red or does not light up at all. Only ARB-L21 (Li-ion 21700) batteries can be charged. The normal charging time for a fully discharged ARB-L21-5000 V2.0 battery is roughly 1.5 hours using a 9 V / 3 A USB source and approximately 2.5 hours using a 5 V / 3 A USB source.  

 Battery charge status indication - Each time the flashlight is turned on, the indication LED activates for three seconds. If the indication diode shines green, the battery is charged to more than 85%. Green flashing means 50-85% capacity. If it shines red, it is charged to 25-50%. Red flashing indicates that less than 25% of battery capacity remains.
 

Intelligent overheat protection - If the flashlight temperature exceeds 60 °C, the power will automatically decrease. As soon as the temperature drops below 60 °C, the power will gradually increase again.

Low battery warning - If the voltage drops below the preset level, the flashlight will reduce brightness to a lower level. Upon reaching the lowest output, the battery charge status indicator will start flashing red to remind you to recharge or replace the battery.

Warning

  
• Do not disassemble the sealed part in the flashlight head yourself; this voids the warranty.
  
• Use only high-quality 21700 Li-ion batteries with protective electronics.
  
• If the protective rubber rings appear damaged after prolonged use, replace them.
  
• If the flashlight flickers, does not switch to higher power, or does not turn on, it may be due to one of the following reasons:  
      
  • The battery is discharged, charge it.
      
  • The contacts inside the flashlight are dirty – clean them with a cotton swab dipped in alcohol.
      
  • The tail cap is loose, tighten it.