On/off for E28R Rechargeable Flashlight 

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

Output Selection 

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

Lock/Unlock 

Lock: with the light switched off, double click the switch within 0.5 seconds to lock the light, the light will blink twice on Eco to indicate locked status. Unlock: with the light locked, double click the switch within 0.5 seconds, the light will be unlocked and activated on Eco. *In locked status, clicking or pressing the switch will activate 2 one-second blinks on Eco to indicate locked status. 

Strobe 

With the light switched on/off, press and hold the side switch for 1.2 seconds to enter Strobe, single click the side switch again to turn back to the previously used output level. 

Intelligent Memory Circuit 

The light memorizes the last selected output excluding strobe. When turned on again the previously used output will be recalled. (Update for purchases made after Sep 2022 - *If the light is turned off on Turbo mode, when turned on again, it will be activated on High mode.)

Battery Specification

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 use quality batteries with circuit protection will reduce the potential for combustion or explosion; but cell damage or short circuiting are potential risks the user assumes. 

Battery Replacement 

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

Charging the E28R Rechargeable Flashlight 

1. First switch off the light and plug the USB A socket of the charging cable into an electrical outlet, then connect the USB Type-C socket of the charging cable to the light.
2. The indicator will display red while charging, and will turn to green when fully charged.
3. Once charging is completed, be sure to close the anti-dust cover. (The light features inner waterproofing treatment, thus the performance won't compromise even if there is water in the charging port).

Note: 

1. The normal charging time of the included Fenix ARB-L18-3400 rechargeable Li-ion battery is approximately 3 hours from depletion to full charging, with 5V/2A adapter.
2. Recharge a stored light every four months to maintain optimum performance of the battery.
3. The relatively Eco output is available while charging, but the charging time will be prolonged.

Battery Level Indication 

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 only works with Fenix ARB-L18 Series 18650 rechargeable Li-ion battery. 

Intelligent Downshift Time-limited Downshift 

The light will downshift to 900 lumens within 30 seconds when it has been used on Turbo for 1 minute. 

Overheat Protection 

The light will accumulate a lot of heat when used on Turbo or High output level for extended periods. When the light reaches a temperature of 60°C or above, the light will automatically step down by 5% every 10 seconds to reduce the temperature, and until to 350 lumens. When the temperature is reduced below 60°C, the light will automatically step up by 5% every 10 seconds, and it will then allow the user for the reselection of Turbo mode. 

Low-voltage Warning 

When the voltage level drops below the preset level of 3V, the flashlight is programmed to downshift to a lower brightness level until Eco output is reached. When this happens in Eco output mode, the battery level indicator blinks red to remind you to recharge the battery. To ensure normal use, the flashlight will not turn off automatically and will work till the battery level runs out or the protection board activates. Note: This only works with Fenix ARB-L18 18650 Li-ion battery. 

Usage and Maintenance of the E28R Rechargeable Flashlight 

• 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 damaged by electrolyte leakage or battery explosion.
• Lock the light or take out the battery to prevent accidental activation during storage or transportation. Recharge a stored battery every four months to maintain optimal battery performance.
• Long-term use can result in O-ring wear. To maintain a proper water seal, replace the 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: The battery needs replacing. Solution: Replace battery (Ensure 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 

• This flashlight is a high-intensity lighting device capable of causing eye damage to the user or others. Avoid shining the flashlight directly into anyone's eyes.
• This flashlight will accumulate a lot of heat when used for extended periods, resulting in high temperature of the flashlight shell. Pay attention to safe use to avoid scalding.
• All information provided in this manual is subject to change without prior notice.

FAQs about Fenix E28R Flashlight 

Q1. What is the product positioning of E28R? And who are the target customers? 

A: The Fenix E28R is a rechargeable EDC flashlight that is long-awaited by EDC lovers. This E28R is fully rechargeable via its USB Type-C charging port with included charging cable; and features inner waterproofing treatment. Running on one single 18650 battery, two CR123A can be used as well; the E28R flashlight has a total output of 1500 lumens, and a beam distance of 200 meters. The flashlight keeps extremely compact for EDC carry, it will likely become part of your favorite everyday carry gear. Convenient side switch activates all lighting modes and includes a battery level indicator - helping you always know the status of your battery. Designed with ultrathin optical lens, the E28R creates soft and balanced beam, which is ideal for night reading and lighting. IP68 rated protection, the Fenix E28R will be your go-to everyday carry flashlight. 

Q2. What are the key features and benefits of E28R? 

A: 1) Compact body for easy carry. 

  2) Included one ARB-L18-3400 18650 rechargeable Li-ion battery.                                                 

  3) USB Type-C fast charging; inner waterproof treatment. 

  4) Simple output selection with side switch. 

  5) Size: 4.29'' x 1.04'' x 0.89'' / 109 x 26.5 x 22.6 mm. 

  6) Weight: 2.33 oz / 66 grams (excluding battery). 

Q3. What kind of LED is used in E28R? 

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

Q4. Does E28R have Intelligent Downshift? 

A: Yes.  

Time-limited Downshift  

The light will downshift to 900 lumens within 30 seconds when it has been used on Turbo for 1 minute. 

Overheat Protection 

The light will accumulate a lot of heat when used on Turbo or High output level for extended periods. When the light reaches a temperature of 60°C or above, the light will automatically step down by 5% every 10 seconds to reduce the temperature, and until to 350 lumens. When the temperature is reduced below 60°C, the light will automatically step up by 5% every 10 seconds, and it will then allow the user for the reselection of Turbo mode.  

Q5. What battery does the E28R support? 

A: It supports a single ARB-L18-3400 18650 rechargeable Li-ion battery (included), and compatible with two CR123A Lithium batteries. 

Q6. What is the requirement of E28R's charging adapter? 

A: With a 5V/2A adapter, the normal charging time of the included Fenix ARB-L18-3400 rechargeable Li-ion battery is approximately 3 hours from depletion to full charging,