1. Uvod
The Alonefire SV38 is a powerful 5W 365nm UV LED flashlight designed for various professional and household applications. Its 365nm wavelength, combined with a black filter lens, ensures a pure ultraviolet output, making it effective for tasks such as detecting counterfeit documents, verifying currency, identifying pet urine stains, curing UV resin, and examining fluorescent minerals. This manual provides essential information for the safe and efficient use of your SV38 flashlight.

Figure 1: Alonefire SV38 UV LED Flashlight and USB-C charging cable.
2. Sigurnosne informacije
UPOZORENJE: Ultraviolet (UV) light can be harmful to eyes and skin. Please read and follow all safety precautions.
- Zaštita očiju: Always wear UV protective eyewear when operating the flashlight to prevent eye damage. Do not look directly into the UV light source.
- Izloženost kože: Avoid prolonged exposure of skin to UV light.
- Djeca i kućni ljubimci: Keep the flashlight out of reach of children and pets. Do not shine the light into their eyes.
- toplina: The flashlight may generate heat during extended use. Handle with care.
- Sigurnost baterije: Use only the specified battery type. Do not attempt to disassemble, short-circuit, or expose the battery to high temperatures.

Figure 2: Components of the SV38 flashlight, including the anodized aluminum alloy shell, power switch/charging indicator, spring contact, and back clip.
3. Podešavanje
3.1 Instalacija baterije
- Odvrnite zadnji poklopac lampe.
- Insert the provided 2000mAh Lithium-ion battery with the positive (+) end facing towards the flashlight head (LED).
- Čvrsto zašrafite zadnji poklopac.
3.2 Početno punjenje
Prije prve upotrebe, potpuno napunite baterijsku lampu.
- Pronađite USB Type-C priključak za punjenje sa strane svjetiljke.
- Connect the provided USB Type-C cable to the flashlight and the other end to a compatible USB power source (e.g., computer, power bank, wall adapter).
- The charging indicator light will illuminate red during charging. It will turn green when fully charged.

Figure 3: Charging indicator status. Red indicates charging or low battery, green indicates fully charged.
4. Operacija
4.1 Uključivanje/isključivanje napajanja
- Press the power button located on the side of the flashlight to turn the UV light ON.
- Press the power button again to turn the UV light OFF.
4.2 Black UV Filter Lens
The SV38 is equipped with a hardened black optical filter lens. This lens is designed to filter out ambient visible light, ensuring that the emitted ultraviolet light is purer and more effective for detection tasks.

Figure 4: The black UV filter lens blocks undesired ambient light, making the UV output purer.
4.3 Aplikacije
The Alonefire SV38 UV flashlight can be used for various purposes:
- Detekcija krivotvorina: Verify currency, passports, and other official documents with UV security features.
- Detekcija mrlja kućnih ljubimaca: Locate invisible pet urine stains on carpets, rugs, and furniture.
- Mineral and Gemstone Inspection: Identify fluorescent minerals and authenticate amber.
- Resin Curing: Accelerate the curing process of UV-sensitive resins.
- Detekcija curenja: Detect leaks in HVAC systems, automotive, and industrial machinery when used with UV dye.
- Scorpion Spotting: Scorpions fluoresce under UV light, making them visible in dark environments.

Slika 5: Pramples of SV38 UV flashlight applications.

Figure 6: Detecting pet urine stains with the UV flashlight.
5. Održavanje
- čišćenje: Obrišite tijelo svjetiljke mekom krpomamp tkanina. Nemojte koristiti abrazivna sredstva za čišćenje ili rastvarače.
- Njega sočiva: Gently clean the lens with a lens cleaning cloth to maintain optimal UV output.
- Održavanje baterije: If the flashlight will not be used for an extended period, remove the battery to prevent leakage. Recharge the battery every 3-6 months to maintain its lifespan.
- Skladištenje: Čuvajte baterijsku lampu na hladnom i suvom mestu dalje od direktne sunčeve svetlosti i ekstremnih temperatura.
6. Otkrivanje problema
| Problem | Mogući uzrok | Rješenje |
|---|---|---|
| Lampa se ne uključuje. | Low battery or battery incorrectly installed. | Charge the battery or ensure it is installed with the correct polarity. |
| UV light appears dim. | Slaba baterija ili prljav objektiv. | Napunite bateriju. Očistite objektiv mekom krpom. |
| Indikator punjenja ne radi. | Neispravan USB kabel ili izvor napajanja. | Pokušajte s drugim USB kabelom ili izvorom napajanja. Provjerite je li kabel potpuno umetnut. |
| Svjetiljka se zagrijava tokom upotrebe. | Normal operation for high-power LED. | This is normal. If it becomes excessively hot, turn it off and allow it to cool. Avoid prolonged continuous use. |
7. Specifikacije
| Feature | Detalj |
|---|---|
| Brand | ALONEFIRE |
| Broj modela | SV38 |
| Vrsta izvora svjetlosti | UV LED (365nm) |
| Potrošnja energije | 5W |
| Materijal | Aluminijumska legura |
| Boja | Crna |
| Vrsta baterije | 1 x 2000mAh Lithium-ion (included) |
| Port za punjenje | USB Type-C |
| Posebne karakteristike | Durable, Lightweight, Rechargeable, Black Filter Lens |
| Dimenzije proizvoda | Približno 14.5 x 7.3 x 3.3 cm |
| Težina artikla | Otprilike 105 g |
8. Garancija i podrška
Alonefire products are manufactured to high-quality standards. For warranty information or technical support, please refer to the seller's return policy or contact Alonefire customer service through their official channels. Spare parts availability is guaranteed for 5 years.