Fenix HM23 Headlamp

Max Lumens: 240
Modes: 3
Battery: AA
(21 customer reviews)


The HM23 is a multi-purpose AA battery powered headlamp that can shine a maximum 240 lumens a distance of 174 feet. Made from high-strength aluminum and silicone, this tough little headlamp weighs only 1.5 ounces and is waterproof and dustproof. Convenient side switch quickly controls three brightness levels of soft neutral white light. And the extremely comfortable, stay put, reflective headband plus 180 degree adjustable beam make this headlamp perfect for all kinds of activities—running, hiking, camping and climbing.

EAN: 6942870306834
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Max Lumens: 240
Modes: 3


hm23 spec chart


Length: 2.7” (69.5mm)
Width: 1.3” (32mm)
Height: 1.6” (40mm)


1.5 oz. (43g) excluding battery


One included Alkaline AA Battery


Alkaline AA battery, hollow headband, silicone holder, spare O-ring


Limited Lifetime Guarantee from Fenix Lighting USA

Additional Features of the Fenix HM23

  • Cree neutral white LED with a lifespan of 50,000 hours.
  • Powered by one AA (alkaline/ Ni-MH) battery (included).
  • Max 240 lumens and max 100 hours runtime.
  • Three output levels for all kinds of lighting demands.
  • Digitally regulated output maintains sectional constant brightness.
  • Reverse polarity protection to protect improper battery insertion.
  • One-switch control ensures easy and fast operation.
  • Low-voltage warning reminds when battery replacement needed.
  • Made of quality aluminum and silicone – tough and durable.


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

Output Selection

With the lamp switched on, single click the switch to cycle through Low→Med→High.
Note: Low mode is activated by default when the lamp is turned on.

Battery Replacement

Unscrew the battery cap to insert the battery in accordance with the polarity marks, then screw the battery cap back on.

Low Voltage Warning

With the lamp switched on, if the voltage level drops below the preset level, the lamp is programmed to downshift to a lower brightness level until low output is reached. When this happens in low output, the lamp blinks to remind you to replace the battery. To ensure normal use, the lamp will not turn off automatically and will work until the battery level runs out.

Headband Assembly

Notice: The headband is factory assembled by default.
Step 1: Attach the headband to the headlamp as shown (Pic Ⅰ-Ⅷ).
Step 2: Adjust the headband by sliding the buckle to required length.

Usage and Maintenance

  • Disassembling the sealed head can cause damage to the lamp and will void the warranty.
  • Loosen the battery cover 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.

If the above methods don’t work, please contact your authorized distributor.


The headlamp is a high-intensity lighting device capable of causing eye damage to the user or others. Avoid shining the lamp directly into anyone’s eyes.

21 reviews for Fenix HM23 Headlamp

Based on 21 reviews
Showing 2 of 21 reviews (3 star). See all 21 reviews
  1. Anonymous (verified owner)


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  2. Greg E. (verified owner)

    I love that it just uses 1 battery. Works really nicely!

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  3. Keith B. (verified owner)

    A great little light. Plenty of power at an affordable price.

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  4. Martin Cohen (verified owner)

    So far great. Love the low setting for reading. Headband very comfortable.

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  5. Gabriel (verified owner)

    Not impressed at the price point. If I could return/exchange it I would. Auto dims when battery gets hot. Often flickers down to lowest setting with a lot of use. It would be good for light camp site use, but not as a sole means of lighting or using on the job sight. Like I previously said I would return it or exchange it if I could.

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    • Dianne (store manager)

      Please note we do have a two week return window if you are not pleased with the product.

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