Introduction
The SOFIRN HS41 is a versatile and powerful headlamp designed for outdoor adventures and everyday carry (EDC). Featuring four LUMINUS SST-20 LEDs, it delivers a maximum output of 4000 lumens and a throw distance of up to 325 meters. This headlamp is equipped with a 5000mAh 21700 lithium-ion battery, USB-C charging and discharging capabilities, and a magnetic tailcap for hands-free use. Its robust AL6061-T6 aluminum alloy body and IP68 waterproof rating ensure durability in various conditions.
Package Contents
Please check the package for the following items:
- SOFIRN HS41 Headlamp
- 5000mAh 21700 Lithium-ion Battery (pre-installed or separate, depending on variant)
- Adjustable Head Strap
- USB Type-C Charging Cable
- Spare O-rings
- User Manual
Specifications
| Feature | Detail |
|---|---|
| Emitter | 4*LUMINUS SST-20 LED |
| Battery Option | 1x 21700 battery (5000mAh included) |
| Working Voltage | 2.7V-4.2V |
| Standby Drain | ≤130uA |
| Input/Output | USB Type-C (5V 3A max charging current) |
| Material | A6061-T6 aluminium alloy |
| Water Resistance | IP68 waterproof (not for diving) |
| Impact Resistance | 1m / 3.28ft |
| Dimensions | 30.1mm (head diameter) * 29mm (body diameter) * 115mm (length) |
| Weight | 79g (without battery) |
| Spotlight Beam Angle | 25° |
| Floodlight Beam Angle | 96° |
| Light Source | LED |
| Switch Mode | High/Middle/Low (Stepped/Smooth Ramping) |
| Purpose | Outdoor lighting, EDC |
| Certifications | CCC, ce, CQC, EMC, FCC, GS, LVD, pse, ROHS, SAA, UL, VDE |
Setup
- Battery Installation:
Unscrew the tailcap of the headlamp. Insert the 21700 lithium-ion battery with the positive (+) end facing towards the head of the flashlight. Screw the tailcap back on securely.
Key components of the HS41 headlamp. - Charging the Battery:
The HS41 features a USB Type-C port for convenient charging. Connect the provided USB-C cable to the headlamp and a 5V/3A charger (not included). The indicator light will flash red during charging and turn green when fully charged. A full charge takes approximately 2 hours.
Charging the HS41 via USB-C. The green light indicates charging. - Attaching the Head Strap:
Slide the headlamp into the rubber holder on the adjustable head strap. Ensure it is securely fitted. Adjust the strap for a comfortable and snug fit on your head.
Operating Instructions
The SOFIRN HS41 offers multiple lighting modes and features for various uses.
Basic Operation:
- Turn ON/OFF: Click the tail switch once to turn the HS41 on/off.
- Change Brightness (Stepped Ramping): While the flashlight is on, press and hold the tail switch to cycle through Eco, Low, Medium, High. Release the switch at your desired brightness level.
- Turbo Mode: Double-click the tail switch to activate Turbo mode (4000 lumens).
- Strobe Mode: Triple-click the tail switch to activate Strobe mode (4000 lumens).
- Switch Ramping Modes: While the flashlight is on, fast four clicks to switch between Stepped ramping and Smooth ramping. The light blinks twice to signal that the switch is completed.
Advanced Features:
- Smooth Ramping: In Smooth Ramping mode, hold and press the switch to continuously change brightness between 10-1500 lumens.
- Low Battery Alert: When the battery is low, the indicator will flash red, and the flashlight will vibrate twice with a 1-minute interval.
- Reverse Charging (Power Bank Function): The HS41 can act as a portable power bank to charge cell phones, rechargeable batteries, iPads, and watches via its USB-C port.
- Magnetic Tailcap: The magnetic tailcap allows for hands-free operation by attaching the headlamp to metal surfaces.
Battery Level Indicator
After turning on the HS41, the indicator will display the power status for 5 seconds:
- Green: Remaining battery power is good (70% - 100%).
- Red: Remaining battery power is poor (30% - 69%).
- Flashing Red: Critical power (less than 30%), please replace or recharge battery.
Maintenance
- Cleaning: Clean the headlamp with a soft, damp cloth. Do not use abrasive cleaners or solvents.
- O-rings: Regularly check the O-rings for wear and tear. Replace them if damaged to maintain the IP68 waterproof rating. Lubricate O-rings with silicone grease periodically.
- Battery Care: Recharge the battery promptly when the low battery alert is triggered. If storing the headlamp for an extended period, remove the battery and store it separately in a cool, dry place.
- Water Resistance: While rated IP68, the headlamp is not designed for diving. Ensure the USB-C port cover is securely closed before exposure to water.
Troubleshooting
- Headlamp not turning on:
- Ensure the battery is correctly installed with the positive (+) end facing the head.
- Check if the battery is charged. If not, charge it using the USB-C port.
- Ensure the tailcap is screwed on tightly.
- Light output is dim or flickering:
- The battery might be low. Recharge the battery.
- Clean the battery contacts and the headlamp's internal contacts.
- Water ingress:
- Ensure the USB-C port cover is fully sealed.
- Check the O-rings for damage or improper seating. Replace if necessary.
User Tips
- Color Temperature: The HS41 is available in different color temperatures, such as 5000K and 6000-6500K. 5000K typically offers a neutral white light, often preferred for natural color rendition, while 6000-6500K provides a cooler, bluer white light, which can appear brighter to some users. Choose the color temperature that best suits your preference and intended use.
- Battery Inclusion: The SOFIRN HS41 typically includes a 5000mAh 21700 battery. Always verify package contents upon receipt.
- Versatile Mounting: Utilize the magnetic tailcap to attach the headlamp to metal surfaces for hands-free illumination in workshops, under car hoods, or during repairs.
- Power Bank Function: In emergencies, the reverse charging feature can be a lifesaver for topping up small electronic devices.
Warranty and Support
Sofirn products are designed for durability and performance. For any issues or inquiries regarding your HS41 Headlamp, please contact Sofirn customer support. Keep your purchase receipt as proof of purchase for any warranty claims.
This product is certified by CCC, CE, CQC, EMC, FCC, GS, LVD, PSE, ROHS, SAA, UL, and VDE, ensuring compliance with international quality and safety standards.
