Sofirn HS41 4000 Lumen Rechargeable LED Headlamp User Manual

1. Introduction

This manual provides comprehensive instructions for the safe and effective operation, maintenance, and troubleshooting of your Sofirn HS41 4000 Lumen Rechargeable LED Headlamp. Please read this manual thoroughly before using the product to ensure optimal performance and longevity.

The Sofirn HS41 can be used as a headlamp with the included headband or as a versatile right-angle flashlight, featuring a magnetic base for hands-free operation.

2. Product Overview

Key Features

• High Output: Equipped with 4*SST20 LEDs, delivering up to 4000 lumens with a beam distance of 325 meters.
• USB-C Charging: Built-in Type-C port for convenient and fast charging.
• Extended Runtime: Up to 29.5 days of usage in Moonlight mode on a single charge.
• Multiple Lighting Modes: 9 modes including Moonlight, Eco, Low, Medium, High, Turbo, Strobe, SOS, and Beacon.
• Durable Design: IPX8 waterproof rating and impact resistance up to 1 meter.
• Versatile Use: 90-degree L-shape design allows use as a headlamp or right-angle flashlight with a powerful magnetic tailcap.
• Safety Features: Advanced Temperature Regulation (ATR) and Low Voltage Protection.

This image highlights the main features of the HS41, such as its multiple lighting modes, extended battery life, convenient USB-C charging, and robust IP68 waterproof design.

What's in the Box

• Sofirn HS41 Headlamp
• 1x Rechargeable Lithium Polymer Battery
• 1x Sturdy Head Band
• 1x Type-C Charging Cable
• 1x User Manual

3. Safety Instructions

• Do not shine the light directly into eyes. The high lumen output can cause temporary vision impairment.
• Keep out of reach of children.
• Use only the specified battery type. Incorrect battery usage can lead to damage or safety hazards.
• Do not disassemble the headlamp, as this may void the warranty and cause damage.
• Avoid exposing the headlamp to extreme temperatures or direct sunlight for prolonged periods.
• Ensure the USB-C port cover is securely closed when not charging to maintain water resistance.

4. Setup

Battery Installation

1. Unscrew the tail cap of the headlamp.
2. Insert the included 18650 Lithium Polymer battery with the positive (+) end facing towards the head of the light.
3. Screw the tail cap back on tightly to ensure proper contact and water resistance.

Charging

The HS41 features a built-in USB-C charging port.

1. Locate the USB-C charging port on the side of the headlamp and open its protective cover.
2. Connect the provided Type-C charging cable to the headlamp and to a USB power source (e.g., wall adapter, power bank, computer).
3. The indicator light on the headlamp will show the charging status:
   • Red: Charging in progress.
   • Green: Fully charged.
4. Charging typically takes approximately 2.5 hours for a full charge.
5. Once charging is complete, disconnect the cable and securely close the USB-C port cover to maintain water resistance.

The headlamp features a built-in USB-C port for convenient and fast charging. The indicator light changes color to show charging status.

5. Operating Instructions

The HS41 is operated via a single side switch.

Basic Operation

• Turn On/Off: Single click the switch to turn the light on or off.
• Change Brightness (Ramping): When the light is on, press and hold the switch to cycle through brightness levels (Moonlight, Eco, Low, Medium, High, Turbo). Release the switch at your desired brightness.
• Mode Memory: The headlamp will remember the last used brightness level (except for special modes like Strobe, SOS, Beacon).

Quick Access Modes

• Moonlight: From OFF, press and hold the switch for 1 second to activate Moonlight mode.
• High Mode: From OFF, double-click the switch to directly activate High mode.
• Strobe Mode: From OFF, triple-click the switch to activate Strobe mode.

The headlamp's single button allows for quick access to frequently used modes: press and hold for Moonlight, double-click for High, and triple-click for Strobe.

Special Modes (Strobe, SOS, Beacon)

• From ON, triple-click the switch to enter Strobe mode.
• While in Strobe mode, double-click to cycle through SOS and Beacon modes.
• Single click to turn off or return to the previous brightness level.

The HS41 delivers a powerful 4000 lumens, providing extensive illumination for outdoor activities. The image shows the light beam and icons representing modes like Moonlight, Eco, Low, Medium, High, Turbo, Strobe, Beacon, and SOS.

Lockout Function

To prevent accidental activation, the HS41 features a lockout mode.

• Activate Lockout: From OFF, perform four quick clicks of the switch. The LED will blink twice to confirm lockout mode is active.
• Deactivate Lockout: Perform four quick clicks of the switch. The light will turn on to the last used mode.

The headlamp features a lockout mode to prevent accidental activation. It is engaged by four quick clicks when the light is off, indicated by two blinks.

Power Indicator

The power indicator displays the battery level for 5 seconds every time the light is turned on.

• Green: Remaining battery power is good (70% - 100%).
• Red: Remaining battery power is poor (30% - 69%).
• Flashing Red: Critical power (less than 30%). Recharge the battery as soon as possible.

The integrated power indicator provides real-time battery status: green (70-100%), red (30-69%), and flashing red (below 30%), prompting timely recharging.

Low Voltage Warning

When the battery voltage drops below 3V, the indicator will flash red, and the headlamp will vibrate twice with a 1-minute interval between each vibration. This signals that the battery needs to be recharged immediately.

When the battery voltage drops below 3V, the headlamp's indicator will flash red, and the device will vibrate twice with a one-minute interval, signaling a low voltage condition.

6. Maintenance

Cleaning

• Wipe the headlamp with a soft, damp cloth to remove dirt and debris.
• Do not use abrasive cleaners or solvents, as they may damage the finish or internal components.
• Clean the threads of the tail cap and O-rings periodically. Apply a thin layer of silicone grease to the O-rings to maintain water resistance.

Battery Care

• Recharge the battery regularly, especially if the headlamp will not be used for an extended period.
• Store the battery in a cool, dry place.
• If storing for a long time, remove the battery from the headlamp to prevent parasitic drain.

Storage

• Store the headlamp in a dry environment, away from direct sunlight and extreme temperatures.
• Ensure the headlamp is in lockout mode or the battery is removed during storage to prevent accidental activation.

7. Troubleshooting

8. Specifications

9. Warranty and Support

For warranty information or technical support, please contact the seller, 77 Outdoor Shop, or the manufacturer, Sofirn, directly through their official channels. Please retain your proof of purchase for any warranty claims.