FENIX LD41 Flashlight Instruction Manual

FENIX LD41 Flashlight

Overview

The Fenix LD41 is a high-performance outdoor flashlight featuring a dual tail cap switch for quick switching between four brightness levels and two flashing modes (Strobe and SOS), plus a momentary-on function. It uses constant brightness output and is waterproof to IPX-8 for reliable use in outdoor conditions and emergencies.

Specifications

Turbo runtime note: after 25 minutes in Turbo, the flashlight automatically downshifts to High due to the security setting; the listed Turbo runtime is the accumulated time.
Accessories: Holster, lanyard, spare O-ring, spare rubber switch boot.

Quick Start

1. Momentary-on: Press the power switch lightly.
2. On/Off: Press the power switch completely to turn on and lock; press again to unlock and turn off.
3. Brightness selection: With the flashlight on, press the mode switch once to cycle Turbo → Low → Mid → High.
4. Strobe: Press and hold the mode switch for about 1 second.
5. SOS: Press and hold the mode switch for about 3 seconds.
6. Exit flashing modes: Press the mode switch once to return to non-flashing mode when in Strobe or SOS.

Memory: In general mode, the LD41 memorizes the last brightness level and returns to it after turning back on.

LD41 Max 960 Lumens User manual Illuminate Your Adventure

LD41 Flashlight

Fenix LD41 is a high-performance outdoor flashlight with a wide range of applications. It employs the unique dual tail cap switch to provide quick switching between four brightness levels and two flashing modes—and a momentary-on function. The elongated all-metal housing, containing four readily-available AA batteries with sufficient power, makes it comfortable to hold. Featuring constant brightness and waterproofing to IPX-8 standards, LD41 can be a good partner in different outdoor conditions and in emergencies.

Technical Parameters

Please note that the LD41 will automatically enter into the High brightness level from the Turbo brightness level after a 25-minute working time with the security setting. So the runtime of the Turbo brightness level is the accumulated time.

Key Features

Mode Switch
press it lightly for brightness selection; press and hold it for nwde selection

Power Switch
Tactical switch with momentary-on

• Uses Cree XM-L2 (U2) LED with a lifespan of 50,000 hours
• Uses four AA (Ni-MH, Alkaline) batteries
• 175mm (Length) x 40mm (Diameter)
• 190-gram weight (excluding batteries)
• Digitally regulated output maintains constant brightness
• Reverse polarity protection guards against improper battery installation
• Low-voltage reminder indicates when battery replacement is needed
• Anti-roll, slip-resistant body design
• Tactical tail cap switch with momentary-on function
• Tail mode switch, one click for brightness selection
• Made of durable aircraft-grade aluminum
• Premium Type III hard-anodized anti-abrasive finish
• Toughened ultra-clear glass lens with anti-reflective coating

Notice: The above-mentioned parameters (lab-tested with 2500mAh Ni-MH batteries) are approximate and may vary between flashlights, batteries and environments.

Operation Instruction

The two tail cap switches include the large button (power switch) and the small button (mode switch).

• Momentary Activation: Press the power switch lightly.
• On/Off: Press the power switch completely to turn on the flashlight and lock it. Another press will unlock and turn it off.
• Brightness Selection: With the flashlight on, a single press on the mode switch cycles through Turbo → Low → Mid → High brightness levels.
• Strobe Mode: Press and hold the mode switch for about one second.
• SOS Mode: Press and hold the mode switch for about three seconds.
• Exit Flashing Modes: Press the mode switch once to return to the non-flashing mode when in Strobe or SOS mode.

Memory Circuit: While in general mode, the LD41 memorizes the brightness level. When turned off and then on again, the flashlight automatically enters the last used brightness level.

Overheating Protection: LD41 will accumulate a great deal of heat when working in the turbo brightness level for a long time. To avoid overheating, the flashlight will downshift from TURBO to HIGH after 25 minutes of use. If TURBO is needed for extended periods, simply reset it, recognizing heat build-up is probable.

Battery Specifications

Warning: Please do not mix batteries of multiple manufacturers, varying size, capacity, or type. Doing so may cause damage to the LD41 or the batteries being used.

Battery Replacement

Unscrew the light head to take out the battery holder. Insert the batteries correctly according to the polarity markings at the bottom of the battery cassette. Put the battery holder into the tube with the round side of the battery holder facing toward the light head and the groove in the side aligned with the raised tab inside the inner wall of the tube. Screw the light head back on tightly to test.

More Information

Troubleshooting

Reason A: The batteries need replacing.

• Solution: Replace batteries (Please confirm correct polarity alignment: anode and cathode).

Reason 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.