Introdución
The ALONEFIRE H42UV 36W 365nm UV Flashlight is a high-performance ultraviolet torch designed for professional and general use. Featuring a powerful 365nm UV LED light source and a specialized black UV filter lens, it provides pure and strong ultraviolet illumination. This flashlight is ideal for detecting fluorescent substances not visible to the naked eye, such as pet urine, currency authentication, scorpion detection, mineral detection, and resin curing. Its durable aluminum alloy shell ensures efficient heat dissipation and long-lasting reliability. The device is USB-C rechargeable and includes four high-capacity rechargeable batteries and UV protective glasses for safe operation.
Que está incluído
Ao desembalar, asegúrate de que estean presentes todos os seguintes compoñentes:
- 1 x ALONEFIRE H42UV 365nm UV Flashlight
- 4 x High-capacity Rechargeable Lithium Ion Batteries (18650)
- 1 x USB Charging Cord (Type-C)
- 1 x UV Protective Glasses

Image: The ALONEFIRE H42UV flashlight, UV protective glasses, and USB charging cable, as included in the package.
Configuración
1. Instalación da batería
The ALONEFIRE H42UV flashlight requires four 18650 Lithium Ion batteries. These are included in your package. To install:
- Desenrosque a tapa da cola da lanterna.
- Insert the four 18650 batteries according to the polarity indicators (+/-) inside the battery compartment. Ensure correct orientation to prevent damage.
- Securely screw the tail cap back on.
2. Carga inicial
Before first use, it is recommended to fully charge the batteries. The flashlight features a convenient USB-C charging port.
- Locate the USB-C charging port on the flashlight body. It is typically covered by a protective rubber flap.
- Abra a tapa de goma e insira o cable de carga USB-C incluído.
- Connect the other end of the USB cable to a compatible USB power source (e.g., wall adapter, computer USB port, power bank).
- The charging indicator light (usually near the power button) will illuminate red while charging. It will turn green when fully charged.
- O tempo de carga é de aproximadamente 6-8 horas para unha carga completa.

Image: USB-C charging interface and indicator light.
3. Protective Glasses
Due to the powerful UV output, it is highly recommended to wear the included UV protective glasses during operation to safeguard your eyes from potential harm. Always avoid shining the UV light directly into eyes.

Image: The ALONEFIRE H42UV flashlight with its accompanying UV protective glasses.
Instrucións de funcionamento
1. Acendido/apagado e selección de modo
The flashlight is operated via a single button located on the side of the body.
- To turn on the flashlight, press the power button once.
- To cycle through brightness modes (typically High and Low), press the power button repeatedly while the flashlight is on.
- To turn off the flashlight, press and hold the power button for approximately 1-2 seconds.

Image: Demonstrating the flashlight's size and power button location.
2. Understanding the Black UV Filter Lens
The ALONEFIRE H42UV is equipped with a hard toughened black filter optical lens. This lens is crucial for filtering out unwanted visible light from the environment, ensuring that the emitted ultraviolet light is purer and more effective for detection tasks.

Image: Illustration of the black UV filter lens function.
3. Aplicacións comúns
The powerful 365nm UV light is versatile for various detection and curing purposes:
- Detección de ouriños de mascotas: Easily spot hidden pet stains on carpets, furniture, and floors.
- Resin Curing & Glue Curing: Acelerar o proceso de curado de resinas e colas sensibles aos raios UV.
- Mineral Detection: Identify fluorescent minerals and rocks.
- Detección de escorpión: Scorpions fluoresce under UV light, making them easy to spot in dark environments.
- Currency & ID Authentication: Verify security features on banknotes, passports, and other official documents.
- Bed Bug Detection: Aid in identifying bed bug infestations.
- Detección de fugas: When used with fluorescent dyes, it can help detect leaks in automotive systems or HVAC.

Image: Various applications of the UV flashlight.
Video: A demonstration of the ALONEFIRE H42UV flashlight's features and its effectiveness in various applications, including leak detection, mineral fluorescence, and identifying impurities.
Mantemento
1. Limpeza
Para manter un rendemento e unha aparencia óptimos:
- Limpe o corpo da lanterna cun pano suave eamp pano. Evite produtos de limpeza abrasivos.
- For the lens, use a lens cleaning cloth and solution designed for optics to avoid scratching.
- Ensure the USB-C port cover is properly sealed after charging to prevent dust and moisture ingress.
2. Coidado da batería
- Recharge batteries regularly, even if not frequently used, to prolong their lifespan.
- Avoid fully discharging the batteries before recharging.
- If storing the flashlight for an extended period, remove the batteries.
3. Almacenamento
Store the flashlight in a cool, dry place away from direct sunlight and extreme temperatures. Keep out of reach of children.
Resolución de problemas
| Problema | Causa posible | Solución |
|---|---|---|
| A lanterna non se acende. | Low or depleted batteries. Incorrect battery installation. Loose tail cap. | Charge the batteries fully. Ensure batteries are inserted with correct polarity. Tighten the tail cap securely. |
| O indicador de carga non se acende. | USB cable not properly connected. Faulty USB power source. Damaged charging port. | Ensure USB-C cable is fully inserted into both the flashlight and power source. Try a different USB cable or power adapter. If the issue persists, contact customer support. |
| A saída de luz é débil ou parpadea. | Batería baixa. | Recarga as pilas. |
Especificacións
| Característica | Detalle |
|---|---|
| Modelo | H42UV |
| Tipo de fonte de luz | 3x 4-core 365nm UV LED |
| Fonte de luz Wattage | 36 vatios |
| Poder luminoso | Up to 6000mW |
| Fonte de enerxía | Battery Powered (4x 18650 Lithium Ion) |
| Interfaz de carga | USB tipo C |
| Material | Aluminio anodizado |
| Cor | Negro |
| Peso do elemento | Aprox. 1.15 libras (0.52 kg) |
| Características especiais | High Power, Rechargeable, Stain Detector, Black UV Filter Lens |
Garantía e soporte
For warranty information, technical support, or any inquiries regarding your ALONEFIRE H42UV flashlight, please refer to the product packaging or contact ALONEFIRE customer service directly. You can also visit the official ALONEFIRE store on Amazon for more information and support resources: ALONEFIRE Store.

