Battery Level Indication; Low-Voltage Warning - Fenix HT18R Manual

3. Recharge a stored light every four months to maintain the optimum performance of the
battery.
*Note: These features only works with a Fenix ARB-L21 series rechargeable battery.

Battery level indication

Each time the light is turned on, the indicator will indicate the 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-L21 series rechargeable 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 65°C/149°F or above, the light will automatically step
down a few lumens to reduce the temperature. When the temperature drops below 65°C/149°F,
the light automatically recalls the previously used output level.

Low-voltage Warning

When the voltage level drops below the preset level, the lamp 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-L21 series rechargeable 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