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Fenix HT18R - Battery Level Indication; Low-Voltage Warning

Fenix HT18R
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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

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