1. Introducció
The TrustFire J18 LED Flashlight is a high-performance illumination device designed for various applications. This manual provides essential instructions for safe and effective use, setup, operation, and maintenance of your J18 flashlight. Please read this manual thoroughly before using the product.
2. Informació de seguretat
- Seguretat ocular: Do not shine the flashlight directly into eyes. The high intensity light can cause temporary vision impairment or permanent damage.
- Nens: Mantingueu la llanterna i les piles fora de l'abast dels nens.
- Ús de la bateria: Use only recommended 18650 or 26650 rechargeable lithium-ion batteries. Ensure correct polarity during installation. Do not mix old and new batteries, or batteries of different types or brands.
- Calor: The flashlight head may become hot during prolonged use, especially on high brightness modes. Exercise caution to prevent burns.
- Resistència a l'aigua: The J18 flashlight is water resistant (IPX4 rated), meaning it can withstand splashes and light rain. It is no dissenyat per a la submersió en aigua.
- Desmuntatge: Do not attempt to disassemble the flashlight head or other sealed components, as this may void the warranty and cause damage.
3. Contingut del paquet
Si us plau, comproveu el paquet per veure si hi ha els elements següents:
- TrustFire J18 LED Flashlight
- Extension Tube (for 3-battery configuration)
- Juntes tòriques de recanvi
Nota: Les piles no estan incloses i s'han de comprar per separat.
4. Producte acabatview
The TrustFire J18 features a robust aluminum alloy construction and multiple lighting modes for versatility.
Característiques principals:
- Alt Brillantor: Up to 8000 lumens output from 7 LEDs.
- Múltiples modes: High, Medium, Low, Strobe, and SOS.
- Construcció duradora: Made from aircraft-grade aluminum alloy.
- Resistent a l'aigua: Classificació IPX4 per a la protecció contra esquitxades d'aigua.
- Potència flexible: Compatible with 2 or 3 18650/26650 batteries.
Components:
The flashlight consists of several main parts:
- Cap: Contains the 7 LEDs and reflector.
- Body Tube: Main housing for batteries. An extension tube can be added.
- Tail Cap: Conté l'interruptor d'alimentació.

Imatge: Explosió view showing the flashlight head, body tube, extension tube, and tail cap.
5. Configuració
Instal·lació de la bateria:
The J18 flashlight can operate with either two or three 18650/26650 batteries. Ensure batteries are fully charged before installation.
- Unscrew the tail cap from the body of the flashlight.
- If using three batteries, screw the extension tube onto the main body tube.
- Insert the 18650 or 26650 batteries into the body tube with the positive (+) end facing towards the flashlight head. Ensure correct polarity.
- Screw the tail cap back onto the body tube securely.

Image: Visual guide demonstrating the assembly of the flashlight body and battery insertion.

Image: Comparison of flashlight length with two and three 18650 battery configurations, showing dimensions.
6. Instruccions de funcionament
Encès/apagat:
To turn the flashlight on or off, firmly press the switch located on the tail cap until it clicks.
Canvi de mode:
The J18 flashlight features 5 lighting modes: High, Medium, Low, Strobe, and SOS.
- With the flashlight turned on, lightly press the tail cap switch (without clicking) to cycle through the modes.
- Alternatively, a quick twist of the flashlight head may also cycle through modes on some versions.
- The flashlight will typically remember the last used mode when turned off and on again.

Image: Illustration of the five distinct lighting modes and the location of the tail cap switch.
7. Manteniment
Neteja:
- Netegeu el cos de la llanterna amb un drap suauamp tela.
- Do not use abrasive cleaners or harsh chemicals, as these can damage the finish or internal components.
- Mantingueu la lent neta per a una sortida de llum òptima. Feu servir un drap de neteja de lents si cal.
juntes tòriques:
- Periodically inspect the O-rings for wear or damage.
- Lubricate O-rings with silicone grease to maintain water resistance.
- Replace damaged O-rings with the provided spares or suitable replacements.
Cura i emmagatzematge de la bateria:
- Remove batteries from the flashlight if it will not be used for an extended period to prevent leakage.
- Guardeu les piles en un lloc fresc i sec.
- Recharge batteries regularly to maintain their lifespan.
8. Solució De Problemes
| Problema | Causa possible | Solució |
|---|---|---|
| La llanterna no s'encén | Low or depleted batteries Instal·lació incorrecta de la bateria Connexions soltes Contactes bruts | Recarregueu o substituïu les piles Ensure correct polarity (+/-) Tighten all parts securely Netegeu els contactes de la bateria amb un cotó |
| La llum parpelleja o és tènue | Càrrega baixa de la bateria Connexions soltes Contactes bruts | Recarregar piles Tighten all parts securely Netegeu els contactes de la bateria |
| Flashlight gets excessively hot | Prolonged use on High mode Alta temperatura ambient | Canvia a un mode de brillantor inferior Deixeu que la llanterna es refredi |
| Entrada d’aigua | Juntes tòriques danyades o mal col·locades Submersion beyond IPX4 rating | Inspect and lubricate/replace O-rings Avoid submersion; the flashlight is water resistant, not waterproof |
9. Especificacions
| Característica | Detall |
|---|---|
| Marca | TrustFire |
| Model | J18 |
| Font de llum | 7 x LED |
| Brillantor | Fins a 8000 lúmens |
| Modes de llum | Alt, Mitjà, Baix, Strobe, SOS |
| Material | Aircraft-grade Durable Aluminum Alloy |
| Font d'alimentació | Funciona amb bateria |
| Tipus de bateria | 2 or 3 x 18650/26650 Lithium-Ion (not included) |
| Voltage | 3.7 Volts |
| Resistència a l'aigua | IPX4 (resistent a l'aigua) |
| Dimensions (aprox.) | 2.17 x 2.17 x 8.86 inches (55 x 55 x 225 mm with 2 batteries, 320mm with 3 batteries) |
| Pes (aprox.) | 1.39 pounds (630g) without batteries |
10. Garantia i Suport
Informació de la garantia:
Specific warranty details for the TrustFire J18 LED Flashlight may vary. Please refer to the warranty card included with your purchase or contact the seller/manufacturer directly for detailed warranty terms and conditions.
Atenció al client:
If you encounter any issues or have questions regarding your TrustFire J18 LED Flashlight that are not covered in this manual, please contact TrustFire customer service or your authorized retailer for assistance. Provide your product model and purchase date when seeking support.



