Intelligent Memory Circuit; Intelligent Overheat Protection; Low-Voltage Warning; Battery Level Indicator - Fenix TK20R User Manual

Intelligent Memory Circuit

The flashlight memorizes the last brightness level used in the General mode, the next time it is
turned on, it will recall that previously used General brightness level.

Intelligent Overheat Protection

The light will accumulate a lot of heat when used at Turbo output level for extended periods.
When the light reaches a temperature of 65℃ or above, the light will automatically step down
by a few lumens to reduce temperature. When the temperature reduces, the output will
gradually return to the maximum brightness of the previously selected output level.

Low-voltage Warning

When the voltage level drops below the preset level in working condition, the battery indicator is
programmed to flash red to remind you of charging, and the flashlight will gradually downshift to
Low output. To ensure normal use, the light will not turn off automatically and will work until the
battery runs out completely.
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3 Battery Level Indicator

When turns on the light, the battery level indicator next to the side switch will display the battery
status for 3 seconds.
Green light constant-on: sufficient
Red light constant-on: poor
Red light flashes: critical
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Charging

4
First plug the USB port of the charging cable into an electrical outlet, then connect the Micro USB
port of the charging cable to the light. The indicator light will display red while charging, and will
turn to solid green when fully charged. The normal charging time is about 3.5 hours.
Note:
1. Once charging is completed, be sure to plug the anti-dust covered.
2. Charging with the light on is not recommended. Doing so may cause extended charging time or
less fully charged battery.
3. Please recharge a stored TK20R every four months to maintain optimum performance of the
battery.

Battery Specifications

Nominal
Type Dimensions Usability
Voltage
Fenix ARB-L18 Series 18650 3.7V Recommended √√