1. Introduction
The ALONEFIRE SV77 is a portable and rechargeable UV flashlight designed for various detection and curing applications. It utilizes a high-quality 395nm UV LED, providing a luminous power of up to 2400mW. Constructed from durable aluminum alloy, this flashlight offers reliable performance and includes essential accessories for safe and convenient use.
2. Safety Information
WARNING: Ultraviolet (UV) light can be harmful to eyes and skin. Direct exposure to UV light should be avoided.
- Do not look directly into the UV light source when the flashlight is active.
- Always wear the provided UV protective glasses when operating the flashlight, especially during prolonged use. These glasses feature darker lenses for enhanced UV protection.
- Keep the device out of reach of children.
- Do not attempt to disassemble or modify the flashlight.
- This device is not water resistant. Avoid exposure to water or high humidity.
Image: The flashlight head showing the UV LED and a caution label regarding direct eye exposure.
3. Package Contents
Verify that all items are present in the package:
- ALONEFIRE SV77 395nm UV Flashlight (with built-in rechargeable battery)
- USB-C Charging Cable
- UV Protective Glasses
Image: The ALONEFIRE SV77 UV flashlight, USB-C charging cable, and UV protective glasses.
4. Setup and First Use
4.1. Charging the Device
Before initial use, fully charge the ALONEFIRE SV77 UV Flashlight.
- Locate the USB-C charging port on the flashlight. This port is designed for easy insertion without specific orientation.
- Connect the provided USB-C charging cable to the flashlight's port.
- Connect the other end of the USB-C cable to a compatible USB power source (e.g., computer USB port, wall adapter, power bank).
- Observe the charging indicator light:
- Red Light: Indicates the flashlight is currently charging.
- Blue Light: Indicates the flashlight is fully charged.
- Once fully charged, disconnect the charging cable.
Image: Detail of the USB-C charging port on the flashlight.
Image: The flashlight charging via USB-C, illustrating the charging indicator colors.
5. Operating Instructions
To operate the ALONEFIRE SV77 UV Flashlight:
- Ensure the flashlight is charged.
- Put on the provided UV protective glasses.
- Press the power button located at the rear of the flashlight to turn it on.
- Direct the UV light towards the area you wish to inspect or illuminate.
- Press the power button again to turn the flashlight off.
6. Applications
The ALONEFIRE SV77 UV Flashlight is suitable for detecting fluorescent substances not visible under normal light. Its applications include:
- Pet Urine and Stains: Identify dried pet urine, feces, and other organic stains on carpets, rugs, and upholstery.
- Pet Ringworm Detection: Assist in identifying fungal infections like ringworm on pets, which may fluoresce under UV light.
- Currency Authentication: Verify the authenticity of banknotes by revealing security features that glow under UV light.
- Scorpion Detection: Scorpions fluoresce brightly under UV light, making them easier to spot in dark environments.
- Mineral and Gemstone Inspection: Observe fluorescence in certain minerals and gemstones for identification or authentication.
- Resin and Glue Curing: Accelerate the curing process of UV-sensitive resins and glues.
- Leak Detection: Detect leaks in HVAC systems, automotive systems, and other machinery when used with UV-sensitive dyes.
- Hotel Room Inspection: Check for cleanliness and hidden stains in hotel rooms.
Image: Examples of pet urine and ringworm detection using the UV flashlight.
Image: Various applications including washroom inspection, mechanical inspection, tableware, and mineral/jewelry authentication.
7. Maintenance
- Cleaning: Wipe the flashlight body with a soft, dry cloth. Do not use abrasive cleaners or solvents.
- Storage: Store the flashlight in a cool, dry place away from direct sunlight and extreme temperatures. If storing for extended periods, ensure the battery is partially charged (around 50%) to prolong its lifespan.
- Battery Care: Recharge the flashlight regularly, even if not in frequent use, to maintain battery health. Avoid fully discharging the battery for prolonged periods.
8. Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Flashlight does not turn on. | Battery is depleted. | Charge the flashlight using the provided USB-C cable. |
| Flashlight does not charge. | Charging cable or power source issue. | Ensure the USB-C cable is properly connected. Try a different USB power source or cable. |
| UV light appears dim. | Low battery or dirty lens. | Recharge the flashlight. Clean the lens with a soft, dry cloth. |
9. Specifications
| Model Number | SV77 395nm |
| Brand | ALONEFIRE |
| UV Wavelength | 395nm |
| Light Source Type | LED |
| Luminous Power | Up to 2400mW |
| Light Source Wattage | 10 Watts |
| Power Source | Battery Powered (Built-in Lithium Ion) |
| Charging Port | USB-C |
| Material | Anodized Aluminum |
| Item Weight | 0.12 Kilograms (approx. 4.2 ounces) |
| Water Resistance Level | Not Water Resistant |
| Special Features | Portable, Rechargeable, Includes UV Protective Glasses |
Image: Dimensions of the ALONEFIRE SV77 UV Flashlight.
10. Warranty and Support
The ALONEFIRE SV77 UV Flashlight comes with a limited warranty. For specific warranty terms and conditions, please refer to the product packaging or contact the manufacturer directly.
For technical support, troubleshooting assistance, or inquiries regarding your product, please contact ALONEFIRE customer service through their official channels or the retailer from whom the product was purchased.




