1. Introducción
The Sofirn D25L is a versatile and powerful rechargeable headlamp designed for various outdoor activities and everyday use. Featuring dual LH351D LEDs, it delivers up to 1000 lumens of bright, neutral light with a high Color Rendering Index (CRI) of 90, ensuring true color perception and reducing eye fatigue during prolonged use. Its robust construction and user-friendly design make it an essential tool for camping, hiking, fishing, running, and more.

Figure 1: Sofirn D25L Headlamp with adjustable headband.
2. Características principales
- Iluminación súper brillante: Dual Powerful LH351D LEDs provide a maximum output of 1000 lumens, capable of illuminating large areas.
- Cómodo Viewen: Neutral beam with 90 high Color Rendering Index (CRI) ensures accurate color representation, suitable for extended use and reading without causing eye strain.
- Tiempo de ejecución extendido: Offers over 6 hours of bright beam on medium 1 mode, ensuring reliable performance for prolonged activities.
- Recarga conveniente: Easily rechargeable via a 5V charger adapter (not included), PC, or power bank. A full charge takes approximately 4 hours with a 5V 1A charger.
- Durable y versátil: Designed to withstand challenging conditions, having passed 12 types of tests. Ideal for camping, hiking, fishing, running, and other demanding environments.
- Accesorios incluidos: Comes with 1 headlamp, 1 battery, 1 headband, and 1 manual.
3. Guía de configuración
3.1. Instalación de la batería y carga inicial
- Remove Insulation Paper: Before first use or recharging, unscrew the tail cap of the headlamp and remove the insulation paper from the battery.
- Insertar batería: Ensure the Sofirn 18650 Li-ion 3000mAh battery is inserted with the positive (+) end facing towards the head of the lamp.
- Tapa trasera segura: Enrosque nuevamente la tapa trasera firmemente para garantizar un contacto adecuado y resistencia al agua.
- Cargando: La cabezaamp features a built-in USB-C charging port. Unscrew the bezel on the side to reveal the port. Connect the provided USB-C cable to the headlamp and a 5V power source (e.g., wall adapter, PC, power bank). The indicator light will show charging status (e.g., red for charging, green for full).

Figure 2: Built-in USB-C charging port and battery compartment.
3.2. Ajuste de la diadema
The adjustable headband allows for a comfortable and secure fit. Adjust the straps to fit snugly around your head or over a cap. The headlamp unit can be tilted up to 180 degrees to direct light precisely where needed.

Figure 3: Headlamp with 180° angle adjustment and adjustable headband.
4. Instrucciones de funcionamiento
4.1. Basic Operation (White Light)
- Encender/Apagar: Single click the power button to turn the headlamp encendido o apagado.
- Modos de brillo del ciclo: When the light is on, press and hold the power button to cycle through brightness levels: Moonlight (1 lumen), Low, Medium, and High (up to 500 lumens). Release the button at your desired brightness.
- Modo Turbo: Double-click the power button from any state to activate Turbo mode (1000 lumens). Double-click again to return to the previous mode.
4.2. Special Modes (Strobe, Beacon, Red Light)
- Strobe/Beacon: Triple-click the power button from any state to activate Strobe mode. Triple-click again to cycle to Beacon mode. Single click to turn off.
- Modo de luz roja: From the OFF state, press and hold the power button for approximately 1 second to activate the red light. Press and hold again to cycle through red light brightness levels. Single click to turn off.
4.3. Lantern Mode
La cabezaamp unit can be easily detached from the headband to function as a standalone mini-lantern or flashlight. This allows for versatile placement on surfaces like picnic tables or inside tents, providing ambient light.
Video 1: Demonstration of Sofirn D25L's high color rendering index and various light modes in a dark environment.
5. Mantenimiento
- Limpieza: Limpiar el cabezalamp con un suave, damp paño. Evite el uso de productos químicos agresivos o materiales abrasivos.
- Cuidado de la batería: For optimal performance and longevity, fully charge the battery before extended storage. If the headlamp will not be used for a long period, it is recommended to remove the battery.
- Resistencia al agua: The D25L is waterproof. Ensure all caps and seals are tightly closed before exposing the headlamp to water to maintain its water resistance.
6. Solución de problemas
- La luz no se enciende:
- Compruebe si se ha quitado el papel aislante de la batería.
- Asegúrese de que la batería esté insertada correctamente con el extremo positivo (+) orientado hacia la cabeza.
- Verify the battery is charged. Connect to a charger and check the indicator light.
- Asegúrese de que la tapa de la cola esté bien atornillada.
- Luz tenue o tiempo de funcionamiento corto:
- La batería puede estar baja. Recargue la batería completamente.
- The battery may be old or damaged. Consider replacing the 18650 battery.
- Problemas de carga:
- Asegúrese de que el cable USB-C esté conectado correctamente a ambos cabezales.amp y la fuente de poder.
- Pruebe con un cable USB-C o un adaptador de corriente diferente.
- Compruebe si el puerto de carga está limpio y libre de residuos.
7. Especificaciones
| Característica | Detalle |
|---|---|
| Marca | Sofirn |
| Número de modelo | D25L |
| Tipo de fuente de luz | LED (Dual LH351D) |
| Brillo blanco | 1000 lúmenes (máx.) |
| Índice de reproducción cromática (IRC) | 90 CRI alto |
| Fuente de poder | Battery Powered (18650 Li-ion 3000mAh included) |
| Puerto de carga | USB-C (5V) |
| Tiempo de ejecución | 6 hours (on medium 1 mode) |
| Material | Aluminio |
| Nivel de resistencia al agua | Impermeable |
| Peso del artículo | 5.3 onzas |
| Dimensiones del paquete | 4.13 x 3.15 x 1.73 pulgadas |
8. Garantía y soporte
The Sofirn D25L Headlamp viene con un Garantía limitada de 1 años A partir de la fecha de compra. Esta garantía cubre defectos de fabricación y problemas derivados del uso normal.
For technical support, warranty claims, or any questions regarding your Sofirn D25L Headlamp, please contact Sofirn customer service through their official channels or the retailer where the product was purchased.





