Joined in 2023 
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A: It is recommended to use 1 x Fenix ARB-L21-5000 V2.0 Li-ion battery. And compatible with Fenix ARB-L21-5000U and Fenix ARB-L21-4000P. Internally there is a stiff spring at the front of the light as well as in the tail, threads are smooth, square cut and a bit dry. Up front the head is glued in place but the bezel is removable. There is a crenulated bezel made of aluminum protecting the AR glass lens, deep smooth reflector and nicely centered LED. Low-voltage Warning When the voltage level drops below the preset level, the flashlight is programmed to downshift to a lower brightness level until Eco output is reached. When this happens in Eco output mode, the light blinks 3 times every 5 minutes toremind youto timely recharge or replace the battery. Note: This only works with Fenix ARB-L21 series 21700 rechargeable Li-ion battery. The flashlightwill accumulate a lot of heat when used at relatively high output levels for extended periods. When the flashlightreaches a temperature of 60°C or above, the lamp will automatically step down a few lumens to reduce the temperature.
Intelligent Overheat Protection The light will accumulate a lot of heat when used on Turbo output levels for extended periods. When the light reaches a temperature of 60°C or above, the light will automatically step down a few lumens to reduce the temperature. When the temperature drops below 60°C, it will then allow the user for the reselection of Turbo mode. Each time the light is turned on, the indicator (unscrew the light head to see) will indicate the battery level and will last for 3 seconds. It will light up for 3 seconds whenever you turn on the flashlight so you can gauge the status of the battery. The Fenix TK20R V2.0 fits absolutely PERFECTLY in my hand. The weight and size make it feel just right. And the anti-slip grooves on the body of the light keep it secure even when it’s raining–which the TK20R V2.0. can handle thanks to its IP68 waterproof and dustproof rating. A Stand-Out Feature: The Protected USB-C Charging PortIt is prohibited to use 18650, 16340 or CR123A batteries. * 21700 Li-ion batteries are powerful cells designed for commercial applications and must be treated with caution and handled with care. Only use quality batteries with circuit protection will reduce the potential for combustion or explosion; but cell damage or short circuiting are potential risks the user assumes.
The torch is made from durable A6061-T6 aluminium with a textured surface to provide plenty of grip and comfort when using. If the lamp will not be used for an extended period, remove the battery, or the lamp could be damaged by electrolyte leakage. The battery that comes with the flashlight is ARB-L21-5000 V2.0 Li-ion battery (21700), but the TK20R V2.0 is also compatible with Fenix ARB-L21-5000U (21700) and Fenix ARB-L21-4000P (21700) batteries. Straightforward Operation 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.
Additional Features of the Fenix TK20R
Length: 6 inrnrnWeight: 5 ozrnrnMaterials: Aircraft-grade aluminumrnrnBeam range: 1017 feet Unboxing When the voltage level drops below the preset level, the flashlight is programmed to downshift to a lower brightness level until Eco output is reached. When this happens in Eco output mode, the light blinks 3 times every 5 minutes toremind youto timely recharge or replace the battery.
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