Fenix HM23 V2.0 – 300 Lumens LED Headlamp AA Battery

Operations

On/off

Press and hold the switch for 0.5 seconds to turn on/off the lamp.

Mode switching

With the lamp switched off, press and hold the switch for 0.5 seconds to turn on the lamp and enter the White light mode.

With the lamp switched off, double click the switch within 0.5 seconds to turn on the lamp and enter the Red light mode.

Output selection

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

Red light mode: single click the switch to cycle through Constant-on→Flash.

Lockout Function

Lock: with the lamp switched off, press and hold the switch for 3 seconds, the lamp will blink red 4 times at 2Hz to indicate locked status.

Unlock: with the lamp locked, press and hold the switch for 3 seconds, the lamp will be activated on the Low output of White light mode after blinking red 4 times at 2Hz to indicate the unlocked status.

In the locked status, a single click or double click of the switch will activate 4 red blinks to indicate the locked status.*Note: With the light locked, remove and reinsert the battery, the light will not be unlocked automatically. You must still press and hold the switch for 3 seconds to unlock the light.

Intelligent Memory Circuit 

The headlamp automatically memorizes the last selected output of each mode. When turned on again the previously used output of selected mode will be recalled.

Battery Specifications  

*It is recommended to use a 1.5V alkaline battery. The headlamp is compatible with either a Fenix ARB-L14-U series rechargeable battery or a Ni-MH battery with a voltage of 2.0V or lower. Using a battery with a voltage exceeding 2V will cause damage to the headlamp.

Battery Replacement 

Unscrew the battery cap and insert the battery with the anode side (+) towards the inner side, then screw the battery cap back on.

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 lamp blinks 3 times every 5 minutes to remind users to replace the 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 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.
• 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 lamp is locked.
  Solution: Press and hold the switch for 3 seconds to unlock the lamp.
  B: Poor battery level.
  Solution: Replace the battery (Ensure the battery is inserted according to the manufacturer’s specifications).
  C: The threads, PCB board contact or other contacts are dirty.
  Solution: Clean the contact points with a cotton swab soaked in rubbing alcohol.