ON/OFF:Press and hold the switch for 0.5 seconds to turn on/off the headlamp.
Output selection for the HM50R:With the headlamp switched on, single click the switch to cycle through Low→Med→High→Turbo. Note: The headlamp memorizes the last selected brightness. When turned on again the previously used brightness level will be recalled.
Battery level indicationWith the headlamp switched off, single click the switch to display the battery level for 3 seconds in different colors:
- Green constant on: more than 80%
- Green flashes: 50% - 80%
- Blue constant on: 20% - 50%
- Blue flashes: less than 20%
Charging the HM50R Rechargeable HeadlampUncover the anti-dust cap and plug the Micro USB terminal of the charging cable into the charging port of the headlamp. Once you're done recharging this headlamp, be sure to remove the charging cable and replace the anti-dust cap. The max charging current is 700mA, and the charging time is about 1.5 hours. The indicator displays blue when charging, and turns green when fully charged. The headlamp can only be used on Med output when charging. Warning: Avoid charging non-rechargeable batteries.
Intelligent Overheat ProtectionThe light will accumulate a lot of heat when used on Turbo output level for extended periods. When the light reaches a temperature of 65°C or above, the light will automatically downshift to High output to reduce temperature. Reset to Turbo if needed.
Low Voltage DownshiftWhen the voltage of the 16340 battery in use drops lower than 3.0V, the low voltage downshift function will be activated. In this state the headlamp cannot be used on Turbo output and will only cycle through High, Med and Low.
Extended RuntimeThe headlamp will automatically step down by a few lumens after being used for an extended period on any of the outputs to extend runtime and to guarantee illumination outdoors.
Use the HM50R as a FlashlightRemove the tail cap and the battery, then remove the headlamp from the holder. Re-insert the battery and screw back the tail cap.
Battery ReplacementUnscrew the tail cap to insert the battery with the anode side (+) towards the lamp head, then screw the tail cap back on.
Headlamp Holder ReplacementThe headlamp holder is made of enhanced silicone, which gives it good anti-tearing ability and mechanical strength, and makes it resistant to low and high temperature, ultraviolet rays, acid and alkali corrosion. The material feels smooth to the touch and should not cause allergic reactions. If the headlamp holder needs replacing, open the tail cap, remove the battery and the holder, and replace with the new spare holder.
Headband AssemblyNotice: The headband is factory assembled by default.
Usage and Maintenance of the HM50R
- Disassembling the sealed head can cause damage to the lamp and will void the warranty.
- Fenix recommends the use of only excellent quality batteries in the HM50R.
- If the lamp will not be used for an extended period, remove the battery, or the lamp could be damaged by electrolyte leakage or battery explosion.
- Unscrew the tail cap half a turn 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 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 for the following reasons: A: The battery needs replacing. Solution: Replace battery (Ensure battery is inserted according to the manufacturer’s specifications). B: The threads, PCB board contact or other contacts are dirty. Solution: Clean the contact points with a cotton swab soaked in rubbing alcohol.