Operating Instructions

On/Off
On: With the lamp turned off, press and hold the switch for 0.5 seconds to turn on the lamp.
Off: In any mode, press and hold the switch for 0.5 seconds to turn off the lamp.

Mode Switching
With the lamp turned off, press and hold the switch for 0.5 seconds to enter White light mode.
With the lamp turned off, double click the switch to enter Red light mode.

Output Selection                
White light mode: Single click the switch to cycle through Eco→Low→Med→High→Turbo.
Red light mode: Single click the switch to cycle through Low→High→Flash.

Lock/Unlock
Lock: With the lamp turned off, press and hold the switch for 3 seconds, the lamp will blink four times in Eco output of White light and then go out to indicate the locked status.
Unlock: With the light locked, press and hold the switch for 3 seconds, the lamp will blink four times and then activate in Eco output of White light to indicate that the lamp is unlocked.
Note: In locked status, clicking the switch will activate four blinks in Eco output of White light before turning off to indicate the locked status.

Intelligent Memory Circuit
The headlamp automatically memorizes the previously used output level excluding Red light mode. When turned on again, the previously used output level will be recalled. 
*When turned on in White light mode, the headlamp will activate in High if it was previously switched off in Turbo.

Battery Specifications

*18350 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.
*CR123A batteries should be reserved for emergency use only. Do not charge while using CR123A batteries! Using CR123A batteries will reduce available output levels and shorten runtime. For optimal performance, it is recommended to use a Fenix ARB-L18-1600 battery.

Battery Replacement
Unscrew the battery cover counterclockwise and insert the battery in accordance with the polarity marks, then screw the battery cover back on.

Charging

1. Open the anti-dust plug and connect the USB Type-C end of the charging cable to the charging port of the headlamp.
2. The indicator will display red while charging and will turn green when fully charged.
3. Once charging is completed, be sure to unplug the charging cable and close the anti-dust plug.
4. With the lamp turned off, the normal charging time of the included Fenix ARB-L18-1600 battery is approximately 2.5 hours from depleted to fully charged with a 5 V/1 A or above charging adapter.
   Note: 
   • The headlamp can be operated while charging.
   • When the voltage level is lower than 3.3 V, only the Low output of each mode and the Flash output can be activated*.
   • Recharge a stored headlamp every four months to maintain the optimum performance of the battery.
   *This only works with a Fenix ARB-L18-1600 battery.
5. Power specifications:
   • Charging voltage: 5 V  
   • Charging power: 5 W 
   • This headlamp does not support fast charging.
   • Only use a certified USB charging adapter that complies with the government safety standards of the country or region where this product is sold.

Battery Level Indication 
With the lamp turned off, single click the switch to check the current battery level and the battery level indicator will last for 3 seconds.

• Green light on: saturated 100% - 80%
• Green light flashes: sufficient 80% - 50%
• Red light on: poor 50% - 20%
• Red light flashes: critical 20% - 0%

*This only works with a Fenix ARB-L18-1600 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 the lowest output is reached. When this happens in the lowest output, the battery level indicator blinks red to remind users to recharge or replace the battery in a timely manner.
*This only works with a Fenix ARB-L18-1600 battery.

Headband Assembly
Notice: 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 headlamp will not be used for an extended period, remove the battery, or the lamp could be damaged by electrolyte leakage.
• 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 headlamp's performance as dirty contacts may cause the headlamp to flicker, shine intermittently or even fail to illuminate for the following reasons:
  A: Poor battery level.
  Solution: Recharge or replace the battery.
  B: The contact or contact point of the battery or headlamp is dirty.  
  Solution: Clean the contact points with a cotton swab soaked in rubbing alcohol.

If the above methods don't work, please contact the distributor.

Warning

• Do NOT place this headlamp in the reach of children!
• Do NOT shine this headlamp directly into the eyes of anyone!
• Do NOT place light head 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!
• Remove the battery or unscrew the battery cover to prevent accidental activation when the headlamp is placed in a closed and flammable environment such as pockets and backpacks!
• The LEDs of this headlamp are not replaceable; so the whole lamp will need to be replaced if any one of the LEDs reaches the end of its lifespan.

What are the key features of HM53R?
A: The Fenix HM53R is a lightweight multifunctional headlamp that is mainly used for outdoor and industrial scenarios. Its key features include:

1. 1200 lumens maximum output, 158 meters maximum beam distance.
2. High-output cold white light and red light.
3. Headlamp mount, body clip, and magnetic tail-cap provide multiple mounting options.
4. Large side switch for simple and glove-friendly operation.

What kind of LEDs are used in HM53R? Does Fenix offer to replace LED? 
A: Uses one Luminus SST-25 cold white LED and two OSRAM-2835 red LEDs; with a lifespan of 50,000 hours each.
Fenix does not provide LED replacement services for the time being, and users are not recommended to replace the LEDs independently, which may affect product performance and cause product damage.

What is the color temperature of HM53R?
A: 6500K.

What is the working voltage of HM53R?
A: Operating voltage: 3.0 V~4.2 V. Maximum operating voltage range: 2.75 V~4.2 V.

Is HM53R rechargeable? How long is the charging time?
A: Yes. The HM53R features a USB Type-C port for charging. The normal charging time is approximately 2.5 hours from depleted to fully charged with a 5 V/1 A or above charging adapter.

How to prevent accidentally activating the HM53R?
A: 
Lock: With the lamp turned off, press and hold the switch for 3 seconds, the lamp will blink four times in Eco output of White light and then go out to indicate the locked status.
Unlock: With the light locked, press and hold the switch for 3 seconds, the lamp will blink four times and then activate in Eco output of White light to indicate that the lamp is unlocked.
Note: In locked status, clicking the switch will activate four blinks in Eco output of White light before turning off to indicate the locked status.

Why does the HM53R downshift to a lower mode after being used for a while and the higher mode cannot be selected?
A: There are two reasons: 

1. 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 or above, the headlamp will automatically step down a few lumens to reduce the temperature.
2. Low-voltage Warning
   When the voltage level drops below the preset level, the headlamp is programmed to downshift to a lower brightness level until the lowest output level is reached.

Why does the HM53R happen to flicker?
A: The reasons that may cause the headlamp to flicker, shine intermittently or even fail to illuminate:

1. Poor battery level.
   Solution: Recharge or replace the battery.
2. The contact point or contact of the battery or headlamp is dirty. 
   Solution: Clean the contact points with a cotton swab soaked in rubbing alcohol.
   If the above methods don't work, please contact the distributor.

What should I do when the HM53R needs repair?
A: 

1. 15-day replacement: Fenix will replace identical or equal products with documented manufacturing defects within 15 days of purchase.
2. 5-year free repair: Fenix will repair a light free of charge within 5 years (rechargeable battery and other accessories: 1 year) of purchase if problems develop with normal use.
3. Lifetime limited warranty: If repair is required after 5 years from the date of purchase, Fenix will charge for parts. The total repair fee is dictated by the cost of the replaced materials.
4. For warranty service, fill out the warranty form at https://www.fenixlighting.com/pages/warranty-repairs to start your repair claim.