Fenix E35R

Product Overview

Built-in rechargeability and improved performance are what make the Fenix E35R unique from its predecessor, the Fenix E35 V3.0. This small flashlight — only 4.72 inches long — blasts a maximum 3,100 lumens 853 feet (260 m). The single side switch activates on/off and all lighting modes — no tail switch needed. A magnet sits where a tail switch normally would, letting you attach the light to most metal surfaces for hands-free use. USB-C rechargeable with a battery level indicator, and rated waterproof and dustproof. When you need a bright rechargeable EDC flashlight, the E35R is the right call.

Note: the ARB-L21-6000 battery only works in a Fenix E35R purchased in or after 2025.

Specifications

• Max lumens: 3,100
• Max beam distance: 853 ft (260 m)
• Max runtime: 69 hours
• Lighting modes: Six modes — five brightness levels plus strobe
• LED: Luminus SST70, 50,000-hour lifespan
• Lens material: Glass
• Color temperature: 6400 K
• Size: Length 4.72 in (120 mm); head 1.04 in (26.5 mm); body 0.98 in (24.8 mm)
• Weight: 5.22 oz (148 g) including battery
• Battery: One included 21700 Li-ion rechargeable
• In the box: ARB-L21-5000 battery, USB Type-C charging cable, lanyard, spare O-ring
• Warranty: Limited Lifetime Guarantee from Fenix Lighting USA

Features

• Luminus SST70 LED, 50,000-hour lifespan
• Mechanical side switch for instant strobe and output selection
• Built-in USB Type-C fast charging
• Magnetic tail for hands-free use
• Body clip included for easy carry
• Boot-up battery level indication and low-voltage warning
• High-efficiency optical lens for a wide, soft, balanced beam
• Reverse polarity protection
• A6061-T6 aluminum body
• Premium HAIII hard-anodized anti-abrasive finish

This flashlight does not have a tail switch.

Operating Instructions

On / Off

Press the switch for 0.5 seconds to turn the light on or off.

Output Selection

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

Strobe

With the light on, press and hold the switch for 1.2 seconds to enter strobe.

Intelligent Memory Circuit

The light remembers the last output used, except Turbo, High, and Strobe. If switched off in Turbo or High, the light returns to Med on next power-on.

Lock / Unlock

Lock: with the light unlocked and off, double-click the switch within 0.5 seconds. The light blinks twice on Eco to confirm.

Unlock: with the light locked, double-click the switch within 0.5 seconds. The light unlocks and activates on Eco.

While locked, any switch press triggers two one-second blinks on Eco to confirm locked status.

Battery

Compatible Batteries

Only ARB-L21 series (21700, 3.6 V) batteries are recommended.

21700 Li-ion batteries are powerful cells designed for commercial applications and must be handled with care. Use only quality batteries with protection circuits. Cell damage or short-circuiting are risks the user assumes.

Battery Replacement

Unscrew the head, insert the battery with the positive (+) end toward the head, then screw the head back on.

Charging

1. Switch off the light.
2. Plug the USB-A end of the cable into a power source, then connect the USB Type-C end to the light.
3. The indicator shows red while charging and turns green when fully charged.
4. When charging is complete, close the dust cover to maintain waterproof and dustproof sealing.

Recommended adapter: 5 V / 2 A or higher.

Notes:

• Full charge of the included ARB-L21-5000 battery from empty takes about 3 hours.
• If stored, recharge the light every four months to maintain optimum battery performance.
• Do not remove the battery during charging. The light is usable while charging (except in Turbo, High, and Strobe).

Battery Level Indication

With the light off, single-click the side switch to check battery status. The indicator stays lit for 3 seconds. The indicator in the neck also displays for 3 seconds each time the light is turned on.

• Green steady: 85% – 100% (full)
• Green flashing: 50% – 85% (sufficient)
• Red steady: 25% – 50% (low)
• Red flashing: 1% – 25% (critical)

Only works with Fenix ARB-L21 series rechargeable batteries.

Intelligent Overheat Protection

Extended Turbo or High use builds heat. At 60 °C and above, the light automatically steps down a few lumens to lower the temperature. Once it drops below 60 °C, Turbo or High can be reselected.

Low-Voltage Warning

When voltage drops below a preset level, the flashlight steps brightness down progressively until it reaches Eco. In Eco, the battery level indicator blinks red steadily as a reminder to recharge or replace the battery.

Only works with Fenix ARB-L21 series rechargeable batteries.

Use and Maintenance

• Do not disassemble the sealed head — doing so damages the light and voids the warranty.
• Use only high-quality protected batteries.
• If the light won't be used for an extended period, remove the battery and store separately.
• Lock the light or remove the battery to prevent accidental activation during storage or transport.
• O-rings wear over time. To keep the water seal intact, replace the ring with an approved spare.
• Periodically clean the battery contacts. Dirty contacts can cause flicker, intermittent operation, or failure to light:
  • Battery is low → recharge or replace.
  • Contacts are dirty → clean with a cotton swab soaked in rubbing alcohol.

If issues persist, contact your authorized distributor.

Warnings

• Keep this light out of the reach of children.
• Do not shine the light directly into anyone's eyes.
• Do not aim the light at flammable objects at close range — the heat can ignite materials.
• Do not bite or place the light in your mouth — failure of the light or internal battery can cause serious injury.
• The body heats up during use. Handle carefully to avoid burns.
• Turn off and lock the light, or remove the battery, when stored in pockets, backpacks, or other enclosed flammable environments.
• The LED is not user-replaceable. Replace the entire light when the LED reaches end of life.