Fenix FD41 Focus Flashlight

Rated 4.25 out of 5 based on 4 customer ratings
(4 customer reviews)

This zoomable – or focusable – flashlight allows the choice of four brightness levels, strobe mode and variable focus. A unique twist of the head smoothly transitions the beam between a spotlight and floodlight. Once the user has the light in the desired position, the beam will stay put in the focus position, no lockout function required. The FD41 focusable flashlight is designed for tactical and outdoor use as adjustable focus is imperative for different environments and actives.

$111.00 $84.95

4.25 out of 5
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Max Lumens: 900
Modes: 5

Flashlight Size:
Length: 5.7” (146mm)
Diameter: 1.0” (25.4mm)
Head: 1.6” (40mm)

Flashlight Weight: 5.6 oz. (160g) excluding battery

Batteries: One 18650 rechargeable Li-ion battery (included) or two CR123A batteries

Included: ARB-L18-2600U USB rechargeable battery, lanyard, holster, tactical ring, spare O-ring, spare rubber switch boot

Warranty: Limited Lifetime Guarantee from Fenix Lighting U.S.

MODE Lumens
Impact Resistance
Low - Spot 10 150h 121ft (37m) 350cd
Low - Flood 10 150h 20ft (6m) 9cd
Med - Spot 150 10h 15min 463ft (141m) 5000cd
Med - Flood 150 10h 15min 66ft (20m) 100cd
High - Spot 350 3h 50min 715ft (218m) 12000cd
High - Flood 350 3h 50min 98ft (30m) 230cd
Turbo - Spot 900 1h 40min 1115ft (340m) 29000cd
Turbo - Flood 900 1h 40min 154ft (47m) 560cd
Strobe 900 - - -
1m IP68, underwater 2 meters, dust proof
Additional Features
  • Uses Cree XP-L HI LED with a lifespan of 50,000 hours
  • 360° rotary focusing technology
  • Digitally regulated output maintains constant brightness
  • Reverse polarity protection, to protect from improper battery insertion
  • Intelligent overheat protection to avoid high surface temperature
  • Tactical tail switch for momentary on and constant activation
  • Functional side switch for output selection
  • Made of durable aircraft-grade aluminum
  • Premium type Ⅲ hard-anodized anti-abrasive finish
  • High efficiency lens with total reflective coating

Operation Instruction

The tail cap switch is the tactical switch, and the side button switch is the functional switch.


Tap the tactical switch to turn on the light momentarily, release it and the light will go out.

Fully press the tactical switch to turn on the light constantly, press once again to switch off the light.

Output Selection

With the light on, single clicking the functional switch continually, the light will cycle through Turbo→Low→Med→High.


With the light on, press and hold the functional switch for 0.5 seconds to activate Strobe; with another single click the light will return to previously used General brightness level.

Spotlight and Floodlight Adjustment

The factory default will be total floodlight. Rotate the focusing ring to regulate the lens focus, thus changing between spotlight and floodlight.

Intelligent Memory Circuit

The flashlight memorizes the last brightness level used in the General mode. The next time it is turned on, it will recall the previously used General brightness level.

Dual-protection Function

Time control: The light will downshift from Turbo to High after 5 working minutes.

Heat control: The light will accumulate a lot of heat when used at Turbo output level for extended periods. When the light reaches a temperature of 55℃ or above, it will automatically step down by a few lumens to reduce temperature. When the temperature is reduced, the output will gradually return.

Low-voltage Downshift Function

When the voltage level drops below the preset level, the flashlight is programmed to downshift to lower brightness levels until Low output is reached. When this happens in Low output mode, the flashlight blinks three times every five minutes to remind you to charge the light or replace the battery. To ensure normal use, the flashlight will not turn off and will work until the over-discharge function stops the battery from working.

Usage and Maintenance

  • Disassembling the sealed head can cause damage to the light and will void the warranty.
  • Fenix recommends using excellent quality battery. If the light will not be used for an extended period, remove the battery, or the light could be damaged by electrolyte leakage or battery explosion.
  • Continuous usage at Turbo brightness level in hot or poor heat dissipation environment, the light may activate overheat protection or light beam trembling. To maintain normal usage, please lower brightness level to cool down the flashlight.
  • Long-term use can result in O-ring wear. To maintain a proper watertight 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 refer to the warranty policy before contacting your authorized distributor.


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

Reviews (4)

4 reviews for Fenix FD41 Focus Flashlight

  1. Rated 3 out of 5

    clint (verified owner)

    I own both the fd30 and the fd41 I am bit disappointed in the lights they have great flood, but thats about it.
    The fd40 had farther reach than these do, other than that there are great lights from fenix.
    You will only get about 75-100 yards of throw on these flashlights.

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  2. Rated 5 out of 5


    I’ve had this light since November 2016 and it’s just as awesome as my Fenix PD35TAC I purchased in October 2016. I’ve given away all my Mag Lights. These lights are the best in the industry.

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  3. Rated 4 out of 5

    James Mitchell

    This review is for the FD40, an older version of the FD41 but fairly similar.

    I’ve accumulated scads of flashlights over the years and this FD40/41 is the only one I reach for. It has a perfect combination of size, power, function and removable rechargeable battery.

    I’d love to give this 5-stars as it really is the best option in its class anywhere. If my request below is fixed, it will jump to 5-stars++++!

    Here’s my one request of Fenix to make this flashlight better: MAKE THE FUNCTION SWITCH EASIER TO LOCATE WITH YOUR THUMB. In the light when you can look, no problem. When walking around in a dark night and rolling the FD40/41 around in your hand “feeling” for the switch, it’s too hard to find. I don’t know how to fix this; maybe backlight the button?

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  4. Rated 5 out of 5

    Hyrum (verified owner)

    Just received mine yesterday and I love it!

    I’ve been looking for an update to my well-used TK11 and TK22 flashlights since the new ones are significantly brighter. When I came across the FD41, it caught my attention due to the great flood option with the focus.

    What I like most about the flood mode is that Fenix tuned the optics well enough to make the light virtually seamless. Those of you who had old incandescent flashlights from yesteryear remember how the light was uneven due to the bulb and filament geometry. The old Maglites that zoomed the bulb in and out showed this as well with the swirls of the light. I’ve also noticed on cheaper LED flashlights that the optics aren’t designed or tuned well enough to eliminate the colorshift or spot-spill look. Fenix excels here beyond any other LED brand I’ve tried. When you twist the collar from spot to flood, you will notice the light separate temporarily causing some light rings and halos. As you continue to the max flood point, you’ll notice the rings disappear and a perfectly uniform light emerge. It’s as brilliant as it is beautiful!

    Yes, of course it’s also very bright. I’ve found that the 150-lumen setting is adequate for looking around the house in the dark. Outside, you can crank it up to get a brighter field of view by basically turning your surrounding night into day.

    Keep up the great innovation and attention to detail, Fenix!

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