On/off 

With the light unlocked, press and hold the side switch for 0.5 seconds to turn on/off the light.

Mode switching

Mode A is General mode, Mode B is Flash mode, and Mode C is Pulse light.

Mode A: With the light switched off, press and hold the side switch for 0.5 seconds to turn on the flashlight and enter Mode A.

Mode B: Press and hold the side switch for 1.2 seconds to enter Mode B(strobe). In Mode B, single click the side switch to exit Mode B and return to Mode A.

Mode C: With the light switched off, triple click the side switch to turn on the flashlight and enter Mode C. Press and hold the side switch to exit Mode C and turn off the flashlight.

Output Selection

Mode A: With the light switched on, single click the side switch to cycle through Eco→Low→Med→High→Turbo.

Mode C: In Mode C, single click the side switch to cycle through Red constant-on→Green constant-on→Red breathing→Green breathing.

Intelligent Memory Circuit 

The flashlight automatically memorizes the last selected output of General Mode excluding Turbo.  When turned on again, the previously used output of General Mode will be recalled. The flashlight will activate in High mode if it was previously switched off in Turbo mode.

Lock/Unlock 

Lock: with the light switched off, double click the switch to lock the light, the light will blink twice in Eco mode to indicate locked status.

Unlock: with the light locked, double click the switch to unlock the light, the light will be unlocked and the previously used output will be recalled.

*In locked status, clicking or pressing the switch will activate 2 blinks on Eco to indicate locked status.

Battery Specifications

Warning: Do not mix batteries of different brands, sizes, capacities or types. Doing so may cause damage to the flashlight or to the batteries being used.

*18650 Li-ion batteries are powerful cells designed for commercial applications and must be treated with caution and handled with care. Only using quality batteries with circuit protection will reduce the potential for combustion or explosion. Cell damage or short circuiting caused by using this type of battery is considered user induced damage and is not covered by any Fenix warranty or liability.

Battery Replacement

Unscrew the light body and insert the battery with the anode side (+) towards the light head, then screw the light body back on.

Charging

1. Turn off the light and open the anti-dust cover to reveal the charging port, then connect the USB Type-C end of the charging cable to the flashlight. 

2. The indicator will display red while charging, and will turn to green when fully charged. 

3. Once charging is completed, be sure to unplug the charging cable and close the anti-dust cover.

4. Only Eco output and Low output can be operated while charging.The flashlight cannot be operated without a battery inserted.

Note:

1. The normal charging time of the included Fenix ARB-L18-3400 rechargeable battery is approximately 3 hours from depletion to fully charged with a 5 V/2 A charging adapter.

2. Recharge a stored light every four months to maintain optimum performance of the battery.

Battery Level Indication 

Each time the light is turned on, the indicator will show the current battery level and will last for 3 seconds. With the light switched off, single click the side switch to check the battery status, the indicator 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-L18 Series battery.

Intelligent Overheat Protection

The flashlight will accumulate a lot of heat when used at high output levels for extended periods. When the light reaches a temperature of 60°C/140°F or above, the light will automatically step down a few lumens to reduce the temperature. When the temperature drops below 60°C/140°F, the light will gradually recall the standard output level.

Low-voltage Warning

When the voltage level drops below the preset level, the flashlight is programmed to downshift to a lower brightness level until Eco output is reached. When this happens in Eco output, the battery level indicator blinks red to remind you to replace or recharge the battery. To ensure normal use, the flashlight will not turn off automatically and will work till the battery level runs out.

Note: This feature only works with a Fenix ARB-L18 Series battery.

Usage and Maintenance

• Disassembling the sealed head can cause damage to the light and will void the warranty.
• Fully charge the light in time to ensure normal function the next time it is needed. 
• 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 damaged by electrolyte leakage or battery explosion.
• 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 lamp's performance as dirty contacts may cause the lamp to flicker, shine intermittently or even fail to illuminate for the following reasons:
  A: Poor battery level.
  Solution: Replace or recharge the battery (Ensure the battery is inserted according to the manufacturer’s specifications).
  B: The threads, PCB board contact or other contacts are 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 shine the flashlight directly into the eyes of anyone!
• All information provided in this manual is subject to change without prior notice.
• DO NOT place this flashlight in the reach of children!
• Do NOT place light head near flammable objects, high temperatures can cause objects to overheat and become flammable/ignite!
• Do NOT use the 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 flashlight shell. Pay close attention to avoid burns.
• Turn off and lock the light or take out the battery to prevent accidental activation during storage or transportation.
• The LED of this flashlight is not replaceable; so the whole flashlight will need to be replaced when the LED reaches the end of its lifespan.

What are the key features of E28R V2.0?

A: Fenix E28R V2.0 is a rechargeable EDC flashlight. Its key features include:

1. 1700 lumens maximum output and 273 meters maximum beam distance.

2. Multiple output levels assist lighting needs required in various scenarios. 

3. Magnetic tail for hands-free use.

4. Two-way body clip for versatile attachment.

5. The unique warning light can alert others and ensure the safety of users.

What kind of LED is used in E28R V2.0? Does Fenix offer to replace LED? 

A: A Luminus SST40 LED with a lifespan of 50,000 hours.

Fenix does not provide LED replacement services for the time being, and users are not recommended to replace the LEDs independently, which may affect product performance and cause product damage.

What is the color temperature of E28R V2.0?

A: Around 6500K.

What is the operating voltage of E28R V2.0?

A: The operating voltage is 3.0 V - 6.4 V.

Is E28R V2.0 rechargeable? How long is the charging time? 

A: Yes. The E28R V2.0 can be recharged through the USB Type-C charging port. The indicator will display red while charging and will turn green when fully charged. The normal charging time is approximately 3 hours from depleted to fully charged.

Why does the E28R V2.0 downshift to a lower mode after being used for a while and the higher mode cannot be selected?

A: There are two reasons:

1. Intelligent Overheat Protection

The flashlight will accumulate a lot of heat when used at high output levels for extended periods. When the light reaches a temperature of 60°C or above, the light will automatically step down a few lumens to reduce the temperature. 

2. Low-voltage Warning

When the voltage level drops below the preset level, the flashlight is programmed to downshift to a lower brightness level until the Eco mode is reached. 

Why does the E28R V2.0 happen to flicker?

A: The reasons that may cause the light to flicker, shine intermittently or even fail to illuminate:

1. Poor battery level.

Solution: Recharge or replace the battery.

2. 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.

What kind of battery can be used in E28R V2.0?

A: It is recommended to use a Fenix ARB-L18-3400 battery. Other Li-ion batteries are not recommended. As an unmatched battery may cause the flashlight to fail to work normally.

What are the optional accessories for E28R V2.0?

A:

Fenix AOD-S V2.0 diffuser tip. 

Fenix AOF-S+ V2.0 filter adapter.

Fenix AOT-S+ traffic wand.

What should I do when the E28R V2.0 needs repair?

A: 

1. 15-day replacement: Fenix will replace identical or equal products with documented manufacturing defects within 15 days of purchase.
2. 5-year free repair: Fenix will repair a light free of charge within 5 years (rechargeable battery and other accessories: 1 year) of purchase if problems develop with normal use.
3. Lifetime limited warranty: If repair is required after 5 years from the date of purchase, Fenix will charge for parts. The total repair fee is dictated by the cost of the replaced materials.
4. If you need warranty service, fill out the warranty form at https://www.fenixlighting.com/pages/warranty-repairs to start your repair claim.