On/off

Tap the tactical switch to momentarily turn on the light, release it and the light will go out. Fully press the tactical switch to constantly turn on/off the light.

Output Selection 

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

Strobe 

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

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

Intelligent Memory Circuit 

The flashlight automatically memorizes the last selected output excluding Strobe.  

Battery Specifications

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

Charging

1. Open the anti-dust cover to reveal the charging port, then connect the USB Type-C end of the charging cable to the flashlight. 
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. 

Note: 

1. When charging fails or the battery is inserted backward, the battery indicator will flash red to remind the user to check the battery.
2. The normal charging time of the flashlight is approximately 1.5 hours from depleted to fully charged. The flashlight cannot be operated while charging.
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 the flashlight while using a CR123A battery. 

*Note: This feature only works with a Fenix ARB-L18-1100 battery, a Fenix ARB-L18-1100P battery, a Fenix ARB-L16-800UP battery, or a Fenix ARB-L16-700UP battery.

Battery level indication

Each time the light is turned on, the indicator will show the current 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-L18-1100 battery, a Fenix ARB-L18-1100P battery, a Fenix ARB-L16-800UP battery, or a Fenix ARB-L16-700UP 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 55°C/131°F or above, the light will automatically step down a few lumens to reduce the temperature. When the temperature drops below 55°C/131°F, the light automatically recalls the previously used output level.

Low-voltage Warning

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 battery level indicator blinks red to remind you to replace or recharge the battery. 

*Note: This feature only works with a Fenix ARB-L18-1100 battery, a Fenix ARB-L18-1100P battery, a Fenix ARB-L16-800UP battery, or a Fenix ARB-L16-700UP 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 light's performance as dirty contacts may cause the light 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.

Warnings

• 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, 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, doing so could cause serious personal injury or death if the flashlight or internal battery fails!
• This flashlight will accumulate a significant amount of heat while operating, resulting in a high temperature of the flashlight shell. Pay close attention to avoid burns.
• Loosen the tail cap or take out the battery to prevent accidental activation during storage or transportation.
• 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 kind of LED is used in TK05R? Does Fenix offer to replace LED?

A: One Luminus OSRAM KW CSLPM1.TG 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 TK05R?

A: The operating voltage is 3.0 V-4.2V. Limit operating voltage range: 3.0V to 5.5V.

What kind of battery can be used in TK05R?

A: It is recommended to use a Fenix 18350 Li-ion battery. Other Li-ion batteries are not recommended. As an unmatched battery may cause the flashlight to fail to work normally.

How to prevent accidentally activate the TK05R?

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

What is the meaning of the flashlight's 5.3° luminous angle?

A: The center light angle of the flashlight is a reflection of the flashlight's ability to gather light, the smaller the center light angle, indicating that the flashlight more light gathering, the same brightness, the longer the range will be.

Why does the TK05R downshift to a lower mode after being used for a while and the higher mode cannot be selected?

A: There are two 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 55°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: 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.

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.

Better anti-interference performance. Complex external environments such as strong magnetic fields are easily dealt through stronger anti-interference ability.

Why does the TK05R happen to flicker?

A: The 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.