1. Introduction
The Alonefire SV116 is a powerful 120W 365nm UV flashlight designed for a wide range of detection and authentication tasks. Utilizing 6x365nm 4-core UV LEDs, it provides strong penetrating power for accurate and reliable detection of fluorescent agents, pet urine, scorpions, currency security features, oil stains, and more. Its robust aluminum alloy construction and Type-C USB charging make it a versatile tool for professionals and enthusiasts alike.

2. Package Contents
Please check the package to ensure all items are present:
- 1 x UV Flashlight (Model SV116)
- 1 x 26650 Battery (Note: Battery may be included or sold separately depending on purchase option)
- 1 x USB Cable (Type-C)
- 1 x Box

3. Setup
3.1 Battery Installation
- Unscrew the tail cap of the flashlight.
- Insert one 26650 battery into the battery compartment with the positive (+) end facing towards the head of the flashlight.
- Screw the tail cap back on securely.
3.2 Initial Charging
Before first use, fully charge the flashlight battery.
- Locate the Type-C USB charging port on the flashlight body. It is usually covered by a rubber flap.
- Open the rubber flap to expose the charging port.
- Connect the provided Type-C USB cable to the flashlight and plug the other end into a 5V USB power source (e.g., charging head, power bank, laptop, car charger).
- The indicator light will show RED while charging.
- Once fully charged, the indicator light will turn GREEN.
- Disconnect the USB cable and close the rubber flap to protect the port from dust and moisture.


4. Operating Instructions
4.1 Power On/Off and Mode Selection
The flashlight features a single button for operation:
- Power On: Press the button once to turn on the flashlight.
- Mode Cycle: With the flashlight on, press the button repeatedly to cycle through the 2 available modes: High Brightness → Low Brightness.
- Power Off: Press and hold the button for a short duration (typically 1-2 seconds) to turn off the flashlight.
4.2 Power Output (Charging Other Devices)
The SV116 flashlight can also function as a power bank to charge other devices via its USB-A output port.
- Open the rubber flap covering the charging ports.
- Connect your device's charging cable to the USB-A output port on the flashlight.
- The flashlight can charge your phone while you continue to use it.

4.3 Applications
The 365nm UV light is ideal for various detection tasks:
- Pet Urine Detection: Easily locate invisible pet urine stains on carpets, furniture, and other surfaces.
- Scorpion Finder: Scorpions fluoresce under UV light, making them easier to spot in dark environments.
- Fluorescent Agent Detection: Identify fluorescent agents in cosmetics, clothing, and other products.
- Currency and Document Authentication: Reveal security features on banknotes, passports, licenses, and other official documents.
- Oil Stain and Leakage Detection: Detect invisible oil leaks in machinery or automotive systems when used with fluorescent dyes.
- Ore and Antique Identification: Observe fluorescence in certain minerals and detect repairs or alterations in art and antiques.




Product demonstration video showcasing the UV flashlight's design, Type-C charging, power output feature (charging a phone), and various detection capabilities such as fluorescent minerals, automotive leaks, and currency authentication.
5. Maintenance
5.1 Cleaning
- Wipe the flashlight body with a soft, damp cloth.
- Do not use abrasive cleaners or solvents.
- Keep the lens clean for optimal performance. Use a lens cleaning cloth if necessary.
5.2 Battery Care
- Recharge the battery regularly, especially if the flashlight is not used for extended periods, to maintain battery health.
- Avoid fully discharging the battery frequently.
- If storing for a long time, charge the battery to about 50% and store in a cool, dry place.
5.3 Storage
- Store the flashlight in a cool, dry place away from direct sunlight and extreme temperatures.
- Remove the battery if the flashlight will not be used for an extended period to prevent potential leakage.
6. Troubleshooting
- Flashlight not turning on: Ensure the battery is correctly installed and fully charged.
- Light is dim: The battery may be low. Recharge the flashlight.
- Charging issues: Check the USB cable for damage and ensure the power source is functioning correctly. Make sure the Type-C cable is fully inserted into the port.
- Intermittent operation: Ensure the tail cap is screwed on tightly. Loose connections can cause intermittent power.
7. Specifications
| Feature | Specification |
|---|---|
| Brand Name | AloneFire |
| Model Name | SV116 |
| Product Material | Aluminium alloy |
| Flashlight Color | Black |
| LED Light Bulb | 6X365nm 4-Core UV LED |
| Power | 120W |
| Applicable Battery | 1 x 26650 battery |
| Charging Method | TYPE-C USB charging |
| Input Voltage | 5V |
| Work Mode | 2 modes (High Brightness - Low Brightness) |
| Working Time | Approx. 3-5 hours (varies with environmental factors) |
| Dimensions (Length x Head x Tail) | 15.2cm/5.98in x 4.5cm/1.77in x 3.6cm/1.42in |
| Weight (Flashlight Only) | Approx. 220g/0.49 Lb |
| Certification | CE, ROHS |
| Waterproof | Yes |
| Lighting Distance | < 50 m |
| Lumen | < 100 |

8. User Tips
- For optimal detection results, use the UV flashlight in a dark environment. The effect of UV purple light is significantly better without ambient light interference.
- Remember that 365nm ultraviolet light is largely invisible to the naked eye. It may not appear as bright as a 395nm flashlight, but it is more effective for specialized detection tasks like fluorescent agents and security codes.
- When using the power output feature to charge other devices, ensure the flashlight has sufficient battery charge to avoid interrupting your detection tasks.
- Always close the rubber flap over the charging ports when not in use to protect them from dust and water, maintaining the flashlight's waterproof integrity.

9. Warranty and Support
This product is manufactured to high-quality standards. In case of any issues or questions regarding the product, please contact the seller or manufacturer for assistance. Keep your purchase records for any warranty claims.