Fenix HM65R-DT Headlamp Reference ManualUpdated 2 hours ago

The Fenix HM65R-DT is a trail running headlamp. 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)

White High: 1300 lumens, 4 hours*, 170 meters, 7167 cd
White Med: 400 lumens, 12 hours, 96 meters, 2321 cd
White Low: 130 lumens, 24 hours, 55 meters, 757 cd
Warm White High: 400 lumens, 12 hours, 92 meters, 2103 cd
Warm White Med: 130 lumens, 24 hours, 50 meters, 621 cd
Warm White Low: 5 lumens, 300 hours, 9 meters, 20 cd

Impact Resistance: 2 meters. Submersible: IP68. *The High output is measured in total of runtime including output at reduced levels due to temperature or protection mechanism in the design.

Warning

Do NOT place this headlamp within the reach of children!
Do NOT shine the headlamp directly into the eyes of anyone!
Do NOT shine flammable objects at close range, to avoid burning objects or causing danger due to high temperature!
Do NOT use the headlamp in inappropriate ways such as biting in the mouth, to avoid personal injury or life-threatening harm if the headlamp or internal battery fails!
This headlamp will accumulate a lot of heat while working, resulting in a high temperature of the headlamp shell. Pay attention to safe use to avoid scalding.
Turn off and lock the headlamp or remove the battery to prevent accidental activation when the headlamp is placed in a closed and flammable environment such as pockets and backpacks!
The LED of this headlamp is not replaceable; so the whole headlamp should be replaced when the LED reaches the end of its life.

Product Features

1300 lumens white light and 400 lumens warm white light. The maximum output of the combined light sources can reach up to 1500 lumens.
Uses Luminus SST40 white and SST20 warm white LEDs, with a lifespan of 50,000 hours.
Included a 3400mAh battery.
Constant current circuit ensures longer runtime.
Reverse polarity protection, to protect from improper battery insertion.
Dual top switches for easy and fast operation.
USB Type-C charging port with fast charging.
Single-handed operation with the new SPORT Headband Fit System.
Quality aluminum, magnesium and PC construction — lightweight and durable.
Size: 3.15" x 1.85" x 1.54" / 80 x 47 x 39 mm.
Weight: 3.21 oz / 91 g (excluding battery).

Operating Instructions

Switches: the White light switch controls on/off, mode switching, lockout, and output selection on White light mode. The Warm white light switch does the same for Warm white light mode. The two modes are separately controlled.

On/Off: press and hold either of the two switches for 0.5 seconds to turn the lamp on or off. Low output level is set by default.

Mode switching: press and hold either of the two switches for 0.5 seconds to reach the corresponding mode.

Output selection — White light mode: single click the White light switch to cycle through Low→Med→High.

Output selection — Warm white light mode: single click the Warm white light switch to cycle through Low→Med→High.

Lockout Function

Lock: with the lamp switched off, simultaneously press the two switches for 3 seconds; the lamp will blink 4 times on Low of Warm white light mode to indicate locked status.

Unlock: with the lamp locked, simultaneously press the two switches for 3 seconds; the lamp will blink 4 times and activate on Low of Warm white light mode. In locked status, clicking or pressing the switches will activate 4 blinks on Low of Warm white light mode to indicate locked status.

Battery Specifications

Fenix ARB-L18 Series (18650, 3.6V): Recommended
Non-rechargeable Battery (CR123A, 3.0V): Usable
Other Rechargeable Battery, Li-ion (18650, 3.6V): Caution
Rechargeable Battery, Li-ion (16340, 3.6V): Banned

18650 Li-ion batteries are powerful cells designed for commercial applications and must be treated with caution and handled with care. Only quality batteries with circuit protection will reduce the potential for combustion or explosion; cell damage or short circuiting are potential risks the user assumes. A Fenix ARB-L18 Series battery is recommended.

Battery Replacement

Unscrew the battery cover counterclockwise to insert the battery with the anode side (+) toward the inner side, then screw the battery cover back on.

Charging

Uncover the anti-dust cap and plug the USB Type-C side of the charging cable into the charging port of the lamp.
The normal charging time of the Fenix ARB-L18-3400 rechargeable battery is about 3 hours with the lamp switched off. When charging, Low output of White light or Warm white light mode can be separately selected. The headlamp will not automatically power on after full charging.
When charging, the charging indicators flash from rear to front to display status: below 20% — one constant-on, three flashing; 20%-50% — two constant-on, two flashing; 50%-80% — three constant-on, one flashing; 80%-95% — four flashing; complete — four constant-on.
Replace the anti-dust cap to ensure waterproof and dustproof ability.

Battery Level Indication

With the lamp switched off, single click either of the two switches to check the battery status; the indicator(s) will last for 3 seconds. There will be no response with the lamp locked.

Four lights on: 100% - 80%
Three lights on: 80% - 60%
Two lights on: 60% - 40%
One light on: 40% - 20%
One light flashes: 20% - 1%

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

Intelligent Overheat Protection

The lamp will accumulate a lot of heat when used on High, Med and Low output levels for extended periods. When the lamp reaches a temperature of 65°C or above, it will automatically step down a few lumens to reduce the temperature. When the temperature drops below 65°C, it will then allow the user to reselect the modes.

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 mode, one of the battery level indicators blinks to remind you to recharge or replace the battery. Note: this only works with a Fenix ARB-L18 Series rechargeable battery.

Headband Assembly

The headband is factory assembled by default. Press the rotary press-pull dial and rotate it clockwise to shorten the headband; pull the dial up to loosen the headband.

Usage and Maintenance

Disassembling the sealed head can cause damage to the lamp and will void the warranty.
Fenix recommends using an excellent quality Fenix battery.
If the lamp will not be used for an extended period, remove the battery, or the lamp could be damaged by electrolyte leakage.
Lock the lamp or take out 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: A) Poor battery level — recharge or replace. B) Dirty contacts — clean with a cotton swab soaked in rubbing alcohol. If the above methods don't work, contact the distributor.

What's Included

Fenix HM65R-DT headlamp, ARB-L18-3400 battery, USB Type-C charging cable, Spare O-ring, User manual, Warranty card.

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