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Fenix HM23 Headlamp

$46.00 $34.95

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Max Lumens:


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SKU: HM23NLBKN/ABarcode: 6942870306834N/A

Product Overview

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.


Max Lumens: 240
Max Beam Distance: 207 feet (63 meters)
Max Runtime: 100 hours
Lighting Modes: 3 brightness levels
Bulb Type: Cree neutral white LED
Size: Length: 2.7” (69.5mm) Width: 1.3” (32mm) Height: 1.6” (40mm)
Weight: 1.5 oz. (43g) excluding battery
Battery: One included Alkaline AA Battery
Included: Alkaline AA battery, hollow headband, silicone holder, spare O-ring
Warranty: Limited Lifetime Guarantee from Fenix Lighting USA

More Information

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.
Fenix HM23 Headlamp specs chart


Fenix HM23 Headlamp runtime chart


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.

No FAQs available.

    No compatible accessories available

Customer Reviews

Based on 59 reviews
Basic. Functional. Lightweight. Intuitive.

Have numerous Fenix lights. Fan of them all. Got this for mornings getting ready for work. Great for 15-20ft. Easy to handle. Intuitive functioning between modes. AA batteries are plentiful. Only thing I'd add is a long press "Off" to lock the headlamp for backpack storage.

Justin Middleton
Great light for trail running.

I had a heavier light from this company that works great, just got this one too, to have a lighter option to take on short runs. Works great!

David Decker
Best light.

I was first given this head lamp I was coming back from Florida and got a flat tire in Nashville at 1am just by chance I put the headlamp in the car very Comfortable and super bright when I got home I ordered 2 more

Nice little headlamp!

I've only used this for a few hours so far, but I really like it. It's nicely lightweight, despite the usual Fenix milled aluminum body. I'd consider the beam width to be "close to medium range"; as long as you're not riding a mountain bike, I think it's great. It's the usual perfectly even circle that Fenix gets out of their LEDs, comfortable up close even for reading, but with a fairly significant throw at the higher light levels.

It's nice to have dead-simple controls- hold half a second to turn on (it always turns on at "low"), single button presses for medium & high, short hold to turn off. It's my personal opinion, but that's exactly how I think controls should work. The button also protrudes enough you can press it with gloved hands.

I also like standardizing on AA batteries; they're not quite the best power source, and I like how Fenix has rechargeable headlamps that can also take AAA's, but I just don't want to deal with it. Unscrew one end, shake out old battery, insert new, screw closed, done.

All in all, for a solid general-purpose headlamp, this is an easy recommendation!


I have the hm65r and it's an awesome light, but a bit much for walking my dog. the hm23 is very light and small. Also, 240 lumen doesn't sound like much, but if I'm at spot where there's no street lights, I get a great view of what's around me, and I feel I'm sure to be seen. With it I bought 2 of the ARB-L14-1600U.

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