Fenix E28R V2.0 Reference ManualUpdated an hour ago

The Fenix E28R V2.0 is a rechargeable EDC flashlight. This summary is drawn from the manufacturer's official user manual — see the downloadable PDF reference manual on the product page for complete details.

Overview

The E28R V2.0 delivers up to 1700 lumens maximum output and 273 meters maximum beam distance from a high-performance LED rated for a 50,000-hour lifespan, powered by an included ARB-L18-3400 18650 battery with USB Type-C charging.

1700 lumens maximum output and 273 meters maximum beam distance.
Utilizes one high-performance LED with a lifespan of 50,000 hours.
Includes one ARB-L18-3400 battery.
Multiple output levels for various lighting scenarios.
Universal USB Type-C charging port.
Instant strobe access.
Simple output selection with the side switch.
Lockout function to prevent accidental activation.
Magnetic tail for hands-free use.
Two-way body clip for versatile attachment.
Unique warning light mode for user safety and visibility.
All-metal CNC machined light body with premium type HAIII hard-anodized anti-abrasive finish.
Size: 4.76" x 1.04" x 0.89" / 121 x 26.5 x 22.5 mm.
Weight: 4.52 oz / 128 g (including battery).

Operating Instructions

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 (Strobe) mode, and Mode C is Warning light mode. From off, press and hold for 0.5 seconds to enter Mode A; press and hold 1.2 seconds from Mode A to enter Mode B; triple click from off to enter Mode C.

Output Selection: Mode A: single click to cycle Eco → Low → Med → High → Turbo. Mode C: single click to cycle Red constant-on → Green constant-on → Red breathing → Green breathing.

Intelligent Memory Circuit: Memorizes the last selected General Mode output, excluding Turbo; activates in High mode if switched off in Turbo.

Lock/Unlock: With the light off, double click the switch to lock (blinks twice in Eco); double click again to unlock and recall the previously used output.

Battery Specifications

Fenix ARB-L18 Series (18650, 3.6V): Recommended.
Non-rechargeable Lithium Battery (CR123A, 3.0V): Usable (no charging).
Rechargeable Li-ion Battery (18650, 3.6–3.7V): Caution.
Rechargeable Li-ion Battery (16340, 3.6–3.7V): Banned.
Rechargeable LiFePO4 Battery (16340 or 18650, 3.2V): Banned.

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

Turn off the light, open the anti-dust cover, and connect the USB Type-C end of the charging cable. The indicator displays red while charging and turns green when full. Only Eco and Low output can be used while charging. Normal charging time is about 3 hours with a 5V/2A adapter. Recharge a stored light every four months.

Battery Level Indication

Green on: saturated 100–85%. Green flashes: sufficient 85–50%. Red on: poor 50–25%. Red flashes: critical 25–1%. (Works only with a Fenix ARB-L18 Series battery.)

Intelligent Overheat Protection

At 60°C/140°F or above, the light automatically steps down output to reduce temperature, gradually recalling the standard output level as it cools.

Low-Voltage Warning

When voltage drops below the preset level, the flashlight downshifts until Eco is reached, then blinks red to prompt recharging. Works only with a Fenix ARB-L18 Series battery.

Technical Parameters (ANSI/PLATO FL1, Fenix ARB-L18-3400 battery)

Turbo: Output 1700 lumens, Runtime 2h 10m*, Distance 273 m, Intensity 18,588 cd, Impact Resistance 1 m, Submersible IP68
High: Output 600 lumens, Runtime 2h 50m, Distance 164 m, Intensity 6717 cd, Impact Resistance 1 m, Submersible IP68
Med: Output 150 lumens, Runtime 17h 15m, Distance 80 m, Intensity 1618 cd, Impact Resistance 1 m, Submersible IP68
Low: Output 50 lumens, Runtime 36h 50m, Distance 45 m, Intensity 512 cd, Impact Resistance 1 m, Submersible IP68
Eco: Output 5 lumens, Runtime 260 hours, Distance 15 m, Intensity 57 cd, Impact Resistance 1 m, Submersible IP68
Strobe: Output 1700 lumens, Impact Resistance 1 m, Submersible IP68
Warning light: Output 1 lumen, Impact Resistance 1 m, Submersible IP68

Specifications are Fenix lab testing results using a single Fenix ARB-L18-3400 battery at 21±3°C and 50–80% humidity. *Turbo runtime includes output at reduced levels due to the built-in temperature protection mechanism.

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 to avoid damage from electrolyte leakage or battery explosion.
Long-term use can result in O-ring wear; replace with an approved spare to maintain a proper water seal.
Periodic cleaning of the battery contacts improves performance; clean with a cotton swab soaked in rubbing alcohol if flickering occurs, or contact your authorized distributor.

What's Included

Fenix E28R V2.0 flashlight, ARB-L18-3400 battery, USB Type-C charging cable, lanyard, spare O-ring, user manual, warranty card.

Was this article helpful?

Yes