When the light is off and unlocked, press and hold the side switch for 0.5 seconds to turn it on. When the light is on, press and hold the side switch for 0.5 seconds to turn it off.
With the light on, single-click the side switch to cycle through Eco→Low→Mid→High→Turbo.
Under unlocked state, press and hold the side switch for 1.2 seconds to enter into Strobe, click again to turn back to previously used General brightness level.
Lock: When the light is off and unlocked, double-click the side switch in 0.5 seconds, the light will blink twice at Mid and then go out, indicating the light is locked.
Unlock: When the light is off and locked, double-click the side switch in 0.5 seconds, the light will be unlocked and power on the last-used output level.
Note: In locked state, the light only responds unlocking operation, press the side switch, the light will blink twice to remind the light is under locked state.
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.
The flashlight will accumulate a lot of heat when it is working at Turbo brightness level. When it works at Turbo for 5 minutes, the flashlight will automatically downshift to High output to prevent the light from overheating. If the Turbo output is needed, please reset it again. But the flashlight could be damaged or the normal service life could be shortened because of continuous use like this.
Low-voltage Warning Function
When the voltage level drops below the preset level, the flashlight is programmed to downshift to a lower brightness level. When this happens in Low output mode, the flashlight blinks three times every five minutes to remind you to charge the light or replace the battery. To ensure normal use, the flashlight will not turn off automatically and will work until the over-discharge function stops the battery from working.
Note: This only works on 18650 rechargeable Li-ion battery. When the voltage of 18650 battery is detected lower than 3V, low-voltage warning function will fail if the flashlight is turned on again. Magnetic Suction Charging Connect the USB AM port of the charging cable to the power source, the indicator light will turn green. Then draw the magnetic end of the charging cable close to the flashlight, the charging cable will attach to the charging port automatically and the charging has begun. The indicator light will flash green in charging process. Last the indicator light turns solid green when charging is completely done. The normal charging time is about 4 hours. Note:
- RC11 only charges normally on 18650 rechargeable battery with button top, Fenix ARB-L18 Series battery with protective circuit is recommended.
- Charging with the light on is not recommended, doing so may cause extended charging time or less fully charged battery. If emergency lighting is needed, the flashlight is only available at Mid output level when it is charging.