Operating Instructions
On/Off
On:
1. In Lockout mode(), turn the toggle switch to (W) or (C) to turn on the flashlight and enter White light mode or Color light mode.
2. With the light turned off and unlocked, press and hold the electronic switch for 0.5 seconds to turn on the flashlight.
Off:
1. With the light turned on and unlocked, press and hold the electronic switch for 0.5 seconds to turn off the flashlight.
2. In any state, turn the toggle switch to Lockout mode() to turn off the flashlight.
Mode Switching
1. With the light head pointing upward, turn the toggle switch from left to right to select Color light mode(C) - Lockout mode() - White light mode(W).
2. In White light mode, press and hold the electronic switch for 1.2 seconds to cycle through Spot-and floodlight→Spotlight→Floodlight. In Color light mode, press and hold the electronic switch for 1.2 seconds to cycle through Red light→Green light→Blue light.
Note: Press and hold the electronic switch for 0.5 seconds to turn off the flashlight; keep holding until 1.2 seconds to switch sub-modes.
Output Selection
In Spot-and floodlight mode: Single click the electronic switch to cycle through Low→Med→High→Turbo.
In Spotlight mode: Single click the electronic switch to cycle through Low→Med→High→Turbo.
In Floodlight mode: Single click the electronic switch to cycle through Low→Med→High→Turbo.
In Red light mode: Single click the electronic switch to cycle through Low→High→Flash.
In Green light mode: Single click the electronic switch to cycle through Low→High.
In Blue light mode: Single click the electronic switch to cycle through Low→High.
Intelligent Memory Circuit
The flashlight automatically memorizes the last selected sub-mode of both White and Color light modes. It also memorizes the last selected output of White light mode (except for Turbo), but it doesn’t memorize the last selected output of Color light mode. When turned on again in Color light mode, it always activates in Low output by default.
Battery Specifications
Type | Dimensions | Nominal Voltage | Usability | |
Fenix ARB-L21-5000 V2.0 | 21700 | 3.6 V | Recommended | √√ |
Fenix ARB-L21-5000U | 21700 | 3.6 V | Recommended | √√ |
Fenix ARB-L21-4000P | 21700 | 3.6 V | Recommended | √√ |
*Do NOT use an 18650, CR123A, or 16340 battery.
*21700 Li-ion batteries are powerful cells designed for commercial applications and must be treated with caution and handled with care. Using low-quality batteries or mishandling batteries (such as short-circuiting or overheating) could lead to combustion and jeopardize the safety of users and property. Any adverse effects resulting from the use of low-quality batteries are not covered by any Fenix warranty or liability. Using quality batteries with circuit protection will reduce the potential for combustion or explosion.
Battery Replacement
Unscrew the tail cap and insert the battery with the anode side (+) towards the light head, then screw the tail cap back on.
Charging
- Slide the port cover to reveal the USB Type-C charging port, then connect the USB Type-C end of the charging cable to the flashlight.
- The indicator will display red while charging and will turn green when fully charged.
- When charging fails or the battery is reversely connected, the battery level indicator will flash red or remain off to remind users to check the battery.
- The fast charging time of the included battery is approximately 1.5 hours from depleted to fully charged with a 9 V/3 A charging adapter (charging takes approximately 2.5 hours in non-fast-charging environments, such as 5 V/3 A).
Note: The flashlight can be activated while charging. The brightness may vary depending on actual conditions, but the number of output levels remains unchanged. When a remote pressure switch is connected, the flashlight cannot be activated while charging.
Battery Level Indication
With the light turned off, single click the electronic switch to check the battery status, the indicator will last for 3 seconds. Each time the light is turned on, the indicator will show the current 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%
*This feature only works with a Fenix ARB-L21 21700 Series battery.
Low-voltage Warning
When the voltage level drops below the preset level, the flashlight is programmed to gradually reduce the brightness level. When the voltage level is still too low, the battery level indicator blinks red to remind users to recharge or replace the battery in a timely manner until the battery runs out.
*This feature only works with a Fenix ARB-L21 21700 Series battery.
Intelligent Overheat Protection
The flashlight will accumulate a lot of heat when used at high output levels for extended periods. When the flashlight reaches a temperature of 60°C/140°F or above, it will automatically step down a few lumens to reduce the temperature. When the temperature drops below 60°C/140°F, the flashlight will gradually recall the preset output level.
Usage and Maintenance
- Disassembling the sealed head can cause damage to the flashlight and will void the warranty.
- Fenix recommends using an excellent quality battery.
- If the flashlight will not be used for an extended period, remove the battery, or the flashlight could be damaged by electrolyte leakage.
- Lock the flashlight or remove the battery to prevent accidental activation during storage or transportation.
- Long-term use can result in O-ring wear. To maintain a proper water seal, replace the O-ring with an approved spare.
- Periodic cleaning of the battery contacts improves the flashlight's performance as dirty contacts may cause the flashlight to flicker, shine intermittently or even fail to illuminate for the following reasons:
A: Low battery level.
Solution: Replace or recharge the battery.
B: The contact or contact point of the battery or flashlight is dirty.
Solution: Clean the contact points with a cotton swab soaked in rubbing alcohol.
If the above methods don't work, please contact your authorized distributor.
Warning
- Do NOT look directly at the light source, stare at the light spot or shine the flashlight directly into the eyes of anyone!
- Do NOT place this flashlight in the reach of children!
- Do NOT place the light head near flammable objects, high temperatures can cause objects to overheat and become flammable/ignite!
- Do NOT use this flashlight in inappropriate ways such as holding the unit in your mouth, doing so could cause serious personal injury or death if the flashlight or internal battery fails!
- This flashlight will accumulate a significant amount of heat while operating, resulting in a high temperature of the light shell. Pay close attention to prevent burns!
- Turn off and lock the flashlight or remove the battery to prevent accidental activation when the flashlight is placed in a closed and flammable environment such as pockets and backpacks!
- The LEDs of this flashlight are not replaceable; so the whole flashlight will need to be replaced when any one of the LEDs reaches the end of its lifespan.
