Fenix HM70R Headlamp Reference ManualUpdated 2 hours ago

The Fenix HM70R is a rechargeable 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.

Safe Use Warnings

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

Technical Parameters (ANSI/PLATO FL1)

Turbo: 1600 lumens, 4 hours, 186 meters, 8667 cd
High: 500 lumens, 6 hours, 105 meters, 2752 cd
Med: 150 lumens, 30 hours, 53 meters, 690 cd
Low: 30 lumens, 100 hours, 26 meters, 170 cd
Red (Functional): 5 lumens, 400 hours, 5 meters, 8 cd
Functional Med: 70 lumens, 48 hours, 16 meters, 68 cd
Functional High: 400 lumens, 8 hours, 38 meters, 352 cd
SOS: 5 lumens, 800 hours, 5 meters, 8 cd

Impact Resistance: 2 meters. Submersible: IP68. General mode covers Turbo/High/Med/Low; Functional mode covers Red/Med/High/SOS. According to the ANSI/PLATO FL1 standard, the above specifications are from the results produced by Fenix through its laboratory testing using one Fenix ARB-L21-5000 Li-ion battery under the temperature of 21±3°C and humidity of 50% - 80%. The true performance of this product may vary according to different working environments and the actual battery used.

Product Features

1600 lumens maximum output; 100 hours ultra-long maximum runtime.
A Luminus SST40 white light LED, an XP-G2 HE neutral white LED, and two 2835 red light LEDs.
Included a 21700 Li-ion battery; an 18650 Li-ion battery can be used as well (together with an ALF-18 battery holder).
White, neutral white and red lights combined.
Toughened ultra-clear glass lens with an anti-reflective coating.
Hidden USB Type-C charging port supports 2A charging current.
Large thumb-sized switch for easy and fast operation.
Digitally regulated circuit for maintaining a stable output.
Size: 3.72" x 2.01" x 1.81" / 94.5 x 51 x 46 mm.
Weight: 7.27 oz / 206 g (including battery and headband).

Operating Instructions

On/Off: press and hold the switch for 0.5 seconds to turn the lamp on or off.

Mode switching: with the lamp switched off, single click the switch to enter General mode, and double click the switch to enter Functional mode. Press and hold the switch for 1.2 seconds to enter the other mode.

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

Output selection — Functional mode: single click the switch to cycle through Red→Med→High→SOS.

Lock/Unlock

Lock: with the lamp switched off, press and hold the switch for 3 seconds; the lamp will blink red 3 times to indicate locked status.

Unlock: with the lamp locked, press and hold the switch for 3 seconds; the lamp will blink 3 one-second red blinks and activate on Red light mode. In locked status, clicking the switch will activate 3 one-second red blinks to indicate locked status.

Intelligent Memory Circuit

The headlamp memorizes the last selected output on Spotlight (General) mode; when turned on again, the previously used output will be recalled.
If the headlamp is turned off on Turbo output, when turned on again it will be activated on High output.

Battery Specifications

Fenix ARB-L21 Series (21700, 3.6V): Recommended
Fenix ARB-L18 Series (18650, 3.6V): Usable (with ALF-18 battery holder)
Rechargeable Battery, Li-ion (16340 or 18650, 3.6V): Banned
Rechargeable Battery, LiFePO4 (16340 or 18650, 3.2V): Banned

21700 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.

Battery Replacement

Unscrew the cap to insert the battery in accordance with the polarity marks, then screw the cap 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 included Fenix ARB-L21-5000 is about 4 hours with the lamp switched off.
The indicator on the battery case will display red while charging and will turn green when fully charged.
When charging is complete, replace the anti-dust cap to ensure waterproof and dustproof ability.
Recharge a stored headlamp every four months to maintain optimal Li-ion battery performance.
When charging, the Med output level of General mode can be used. The headlamp will not automatically power on after full charging.

Charging indication only works with a Fenix ARB-L21-5000 battery.

Battery Level Indication

With the lamp switched off, single click the 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 a Fenix ARB-L21-5000 battery.

Intelligent Overheat Protection

The lamp will accumulate a lot of heat when used at relatively high 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, the battery level indicator blinks to remind you to recharge or replace the battery. Note: this only works with a Fenix ARB-L21-5000 battery.

Headband Assembly

The headband is factory assembled by default. Adjust the headband by sliding the buckle to the required length.

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.
Loosen the cap or take out the battery to prevent accidental activation during storage or transportation.
Periodic cleaning of the battery contacts improves the lamp's performance: A) The battery needs replacing — replace the battery. B) The contact point or contact of the battery or headlamp is dirty — clean with a cotton swab soaked in rubbing alcohol. If the above methods don't work, contact the distributor.

What's Included

Fenix HM70R headlamp, ARB-L21-5000 Li-ion battery, USB Type-C charging cable, Spare O-ring, User manual, Warranty card.

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