Q1. What are the key features of TK20R UE?
A: Fenix TK20R UE is a tactical flashlight. Its key features include:
- Patented FlexiSensa control toggle switch.
2. Tactical and Duty modes for flexibly needed choice and operation.
3. Hidden USB Type-C charging port.
Q2. What kind of LEDs are used in TK20R UE? Does Fenix offer to replace LED?
A: A Luminus SST70 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.
Q3. What is the color temperature of TK20R UE?
A: Around 6500K.
Q4. What is the operating voltage of TK20R UE?
A: The operating voltage is 3.0 V. The operating current is 4.2 A.
Q5.Is TK20R UE rechargeable? How long is the charging time?
A: Loosen the light head counterclockwise to reveal the USB Type-C charging port and the indicator. The indicator will display red while charging and will turn green when fully charged. Once charging is completed, be sure to tighten the light head to maintain the dustproof and waterproof ability. The normal charging time is approximately 4 hours from fully depleted to fully charged(The adapter needs to support 5V/2A or above).
Q6. How to prevent accidentally activate the TK20R UE?
A: Lock: In any state, rotate the FlexiSensa Control toggle switch to OFF/Lock mode to turn off the light.
Unlock: With the light switched on, rotate the FlexiSensa Control toggle switch to Tactical mode or Duty mode to enter the previously used output.
Q7. Why does the TK20R UE 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 relatively high output levels for extended periods. When the flashlight reaches a temperature of 60°C or above, the lamp 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 Low output is reached.
Q8. Why does the TK20R UE happen to flicker?
A: The reasons that may cause the flashlight to flicker, shine intermittently or even fail to illuminate:
A: Poor battery level.
Solution: Recharge or replace the battery (Ensure battery is inserted according to the manufacturer’s specifications).
B: The contact point or contact 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 the distributor.
Q9. What kind of battery can be used in TK20R UE?
A: Fenix ARB-L21-5000 V2.0 is recommended. Other Li-ion batteries are not recommended. As an unmatched battery may cause the flashlight to fail to work normally.
Q10. What are the optional accessories for TK20R UE?
A: ALR-01 Tactical flashlight ring, ALG-16 M-Lok quick-release rail mount, ALG-00 Rail mount, ALG-18 Rail mount, AER-05 Remote pressure switch, etc.
Q11. What should I do when the TK20R UE needs repair?
A: 1. 15-day replacement: Fenix will replace identical or equal products with documented manufacturing defects within 15 days of purchase.
2. 5-year free repair: Fenix will repair a light free of charge within 5 years (rechargeable battery: 1 year) of purchase if problems develop with normal use.
3. Lifetime maintenance: If repair is required after 5 years from the date of purchase, Fenix will charge for parts. The total repair fee is dictated by the cost of the replaced materials.
