The Fenix HM71R V2.0 is a high-performance, multi-function industrial headlamp with 3500 lumens max output and 275 meters max beam distance. This summary is drawn from the manufacturer's official user manual — see the downloadable PDF reference manual on the product page for complete details.
Technical Parameters (ANSI/PLATO FL1)
- Spotlight — Turbo: 3000 lumens, 3h 10min*, 272 m (892 ft), 18,488 cd
- Spotlight — High: 800 lumens, 5h 10min, 139 m (456 ft), 4,823 cd
- Spotlight — Med: 350 lumens, 19h 25min, 92 m (302 ft), 2,113 cd
- Spotlight — Low: 50 lumens, 53h 35min, 35 m (115 ft), 307 cd
- Floodlight — Turbo: 500 lumens, 5h 25min, 48 m (157 ft), 580 cd
- Floodlight — High: 200 lumens, 18 hours, 30 m (98 ft), 230 cd
- Floodlight — Med: 50 lumens, 48h 35min, 15 m (49 ft), 56 cd
- Floodlight — Low: 5 lumens, 337 hours, 4 m (13 ft), 4 cd
- Red Light — High: 100 lumens, 11h 15min, 15 m (49 ft), 60 cd
- Red Light — Med: 30 lumens, 24h 35min, 8 m (26 ft), 16 cd
- Red Light — Low: 5 lumens, 124 hours, 2 m (7 ft), 1 cd
- Red Light — Flash: 5 lumens
Impact Resistance: 2 meters. Submersible: IP68 (waterproof, submersible to 2 meters for 30 minutes). *Turbo runtime is measured including reduced output from thermal step-down. Tested per the ANSI/PLATO FL1 standard using one Fenix ARB-L21-5500 battery at 21±3°C / 50–80% humidity; real-world performance may vary.
Warnings
- Do not place this headlamp in the reach of children.
- Do not shine the headlamp directly into the eyes of anyone.
- Do not place the light near flammable objects; high temperatures can cause objects to overheat and become flammable/ignite.
- Do not use this headlamp in inappropriate ways such as holding the unit in your mouth, doing so could cause serious personal injury or death if the headlamp or internal battery fails.
- This headlamp will accumulate a significant amount of heat while operating, resulting in a high temperature of the lamp shell. Pay close attention to avoid burns.
- Turn off the headlamp or remove the battery to prevent accidental activation when the headlamp is placed in a crowded and flammable environment such as pockets and backpacks.
- The LEDs of this headlamp are not replaceable; the whole lamp will need to be replaced if any of the LEDs reaches the end of its lifespan.
Product Features
- 3500 lumens maximum output, 275 meters maximum beam distance.
- Uses one Luminus SFT-60 cold white LED, one Luminus SST-20F cold white LED, and two HFL1-R red LEDs, with a lifespan of 50,000 hours each.
- Spotlight, floodlight, and red light designed for various complex outdoor scenarios.
- Toggle switch and electronic switch for simple and fast operation.
- Quick-release body clip design enables the lamp to be detached from the mount to serve as a flashlight.
- Magnetic tail for easy and flexible mounting.
- Powered by an included ARB-L21-5500 replaceable battery.
- Inner waterproof USB Type-C charging port.
- Made of A6061-T6 aluminum alloy material with a premium type HAIII hard-anodized anti-abrasive finish.
- IP68-rated protection and 2 meters impact resistance.
- Size (including mount): 4.39" x 2.10" x 1.97" / 111.5 x 53.4 x 50 mm.
- Weight: 7.76 oz / 220 g (including battery and headband).
Operating Instructions
On/Off: With the lamp turned off and locked, turn the toggle switch from Lock to any mode to turn on the headlamp. With the lamp unlocked, press and hold the electronic switch for 0.5 seconds to turn on the headlamp. With the lamp turned on, turn the toggle switch from any mode to Lock to turn off and lock the headlamp, or press and hold the electronic switch for 0.5 seconds to turn off the headlamp.
Mode Switching: Turn the toggle switch to cycle bidirectionally through Red Light ⇄ Lockout ⇄ Spotlight ⇄ Floodlight. By default, the toggle switch is set to the Off/Lockout mode.
Output Selection: Spotlight mode: single click the electronic switch to cycle through Low→Med→High→Turbo. Floodlight mode: single click to cycle through Low→Med→High→Turbo. Red light mode: single click to cycle through Low→Med→High→Flash.
Instant Turbo: In any white light mode, press and hold the electronic switch for 1.2 seconds to enter Turbo mode. Single click, or inactive for 60 seconds, to recall the previously used mode and output. The headlamp features built-in intelligent overheat protection, so it is normal for it to automatically reduce brightness when the temperature exceeds 55°C.
Intelligent Memory Circuit: The headlamp automatically memorizes the last selected output of each mode excluding Red light. When turned on again, the last selected output will be recalled. The headlamp will activate in High output if it was previously switched off in Turbo output.
Battery Specifications
- Fenix ARB-L21 Series: 21700, 3.6V — Recommended
- Rechargeable Battery (Li-ion), non-Fenix: 21700, 3.6V — Use with caution
- Battery without Protection Board (Li-ion): 21700, 3.6V — Banned
*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 battery cover and insert the battery in accordance with the polarity marks, then screw the battery cover 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 headlamp.
- The indicator will display red while charging and will turn green when fully charged.
- Once charging is completed, be sure to unplug the charging cable and close the port cover to prevent the ingress of dust and debris.
- With the lamp turned off, the charging time of the included Fenix ARB-L21-5500 battery is approximately 2 hours from depleted to fully charged with a 9V/3A or above charging adapter.
Note: The headlamp can be operated while charging, with all outputs available except Turbo. Recharge a stored headlamp every few months to maintain the optimum performance of the battery. Only use a certified USB charging adapter that complies with local safety standards.
Battery Level Indication
With the lamp turned off, single click the electronic switch to check the battery status; the indicator will last for 3 seconds (or click again to dismiss immediately). Each time the lamp is turned on, the indicator will also show the battery level for 3 seconds.
- Green light on: 100% - 85%
- Green light flashes: 85% - 50%
- Red light on: 50% - 20%
- Red light flashes: 20% - 1% (please charge in time)
*This feature only works with a Fenix ARB-L21 Series rechargeable battery.
Intelligent Overheat Protection
The headlamp will accumulate a lot of heat when used at high output levels for extended periods. When the headlamp reaches a temperature of 55°C/131°F or above, it will automatically step down a few lumens to reduce the temperature. When the temperature drops below 55°C/131°F, the headlamp will gradually recall the preset output level.
Low-Voltage Warning
When the voltage level drops below the preset level, the headlamp is programmed to downshift to a lower brightness level until Low output is reached. When this happens in Low output, the battery level indicator blinks red to remind users to recharge or replace the battery in a timely manner.
Headband Assembly
The headband is factory assembled and ready to use right out of the package. Adjust the headband by sliding the buckle to the required length.
Usage and Maintenance
- Disassembling the sealed head can cause damage to the headlamp and will void the warranty.
- Fenix recommends using an excellent quality battery.
- If the lamp will not be used for an extended period, remove the battery, or the headlamp could be damaged by electrolyte leakage.
- 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 lamp's performance as dirty contacts may cause the lamp to flicker, shine intermittently, or even fail to illuminate. If the above methods don't help: A. Low battery level — recharge or replace the battery. B. Contact point of the battery or headlamp is dirty — clean the contact points with a cotton swab soaked in rubbing alcohol. If the above methods don't work, please contact the distributor.
What's Included
- Fenix HM71R V2.0 headlamp
- ARB-L21-5500 battery
- USB Type-C charging cable
- Spare O-ring
- User manual
- Warranty card
