1. Introducció
The JF.EGWO F40 3750A Portable Car Battery Jump Starter is a high-performance device designed to provide a powerful and safe solution for starting 12V vehicles. With a peak current of 3750A and a 22000mAh capacity, it can easily start gasoline engines up to 9.0L and diesel engines up to 8.0L. Beyond jump starting, it functions as a versatile power bank with 18W fast charging capabilities and includes an integrated LED flashlight with multiple modes. This manual provides detailed instructions for safe and effective use, maintenance, and troubleshooting.

Figure 1.1: JF.EGWO F40 3750A Jump Starter with smart clamps connectat.
2. Informació important de seguretat
Please read all safety warnings and instructions before using this product. Failure to follow these instructions may result in electric shock, fire, and/or serious injury.
- No ho facis arrencar una bateria congelada.
- No ho facis use the jump starter if the battery clamps o cables estan danyats.
- No ho facis connect the positive and negative clamps junts.
- No ho facis expose the device to rain or wet conditions. It is IP65 water-resistant, but not submersible.
- No ho facis desmunteu la unitat. Envieu totes les tasques de manteniment a personal qualificat.
- Assegureu-vos una ventilació adequada durant l'ús.
- Mantenir fora de l'abast dels nens.
- The device is equipped with an intelligent protection system against short circuits, overheating, overvoltage, overcharge, deep discharge, overcurrent, and reverse polarity.

Figure 2.1: Advanced technology provides reverse polarity, foolproof, and spark-proof protection.

Figure 2.2: The device is dustproof, 1.5m shockproof, IP65 waterproof, and operates in temperatures from -40°C to 60°C.
3. Contingut del paquet
Verifiqueu que tots els elements siguin presents al vostre paquet:
- JF.EGWO F40 3750A Jump Starter Unit
- Smart Jumper Clamps (Vermell per a positiu, Negre per a negatiu)
- Cable de càrrega USB-C
- Manual d'usuari
- Estoig d'emmagatzematge

Figure 3.1: Illustration of the package contents including the jump starter, smart clamps, USB cable, and manual.
4. Producte acabatview
Familiarize yourself with the components of your JF.EGWO F40 Jump Starter:
- Unitat principal: Houses the battery, control circuitry, and display.
- 3.7" LED Display: Mostra el percentatge de bateriatage, voltage, and status indicators (SOS, Speed, Low/High temperature).
- Botó d'encesa: Per encendre/apagar la unitat i alternar entre els modes de llanterna.
- USB-C Port (PD18W): For charging the jump starter (input) and charging other devices (output).
- USB Ports (5V/9V/12V, 5V/2.4A): For charging various electronic devices.
- 15V 10A DC Output: For powering 15V or 12V DC devices like tire inflators or inverters.
- Port d'arrencada ràpida: Connects to the smart jumper clamps.
- Llanterna LED: Located on the front, offers multiple lighting modes.

Figure 4.1: The 3.7" LED display provides clear and simple information.
5. Configuració
5.1 Càrrega inicial
Before first use, fully charge the JF.EGWO F40 Jump Starter. It is equipped with 18W USB-C fast charging technology.
- Connect the supplied USB-C charging cable to the USB-C input/output port on the jump starter.
- Connect the other end of the USB-C cable to an 18W (or higher) USB wall adapter (not included) or a compatible power source.
- The LED display will show the charging progress. A full charge (22000mAh) can be achieved in approximately 70 minutes with an 18W fast charger.
5.2 Comprovació del nivell de la bateria
Press the power button once to check the current battery level displayed on the LED screen. Ensure the unit is sufficiently charged before attempting to jump start a vehicle.

Figure 5.1: The 18W fast charging capability allows for quick charging of the unit and other devices.
6. Instruccions de funcionament
6.1 Arrencada amb salt d'un vehicle
The JF.EGWO F40 can jump start 12V vehicles with up to 9.0L gasoline or 8.0L diesel engines, up to 50 times on a single charge.
- Preparar el vehicle: Turn off the vehicle's ignition and all accessories (headlights, radio, air conditioning). Place the vehicle in park (automatic) or neutral (manual) and engage the parking brake.
- Connectar Clamps a l'arrencador de bateria: Inseriu el connector blau del connector de pont intel·ligentamps into the jump start port on the JF.EGWO F40 unit. Ensure it is fully inserted.
- Connectar Clamps a la bateria:
- Connecteu el VERMELL positiu (+) clamp al terminal positiu (+) de la bateria del vehicle.
- Connecteu el NEGRE cl negatiu (-)amp al terminal negatiu (-) de la bateria del vehicle.
Note: The smart clamps have built-in protection against reverse polarity. If connected incorrectly, an alarm will sound, and the display will show an error. Correct the connection before proceeding.
- Arrancar el vehicle: Un cop el clamps are correctly connected and the jump starter indicates "12V READY" on the display, start your vehicle's engine.
- Eliminar Clamps: As soon as the engine starts, remove the clamps from the vehicle battery first (negative then positive), and then disconnect the clamps de la unitat d'arrencada de bateria.

Figure 6.1: The JF.EGWO F40 can rejuvenate your car in no time, supporting up to 9L gasoline and 8L diesel engines.

Figure 6.2: The 3750A peak value allows easy starting of various 12V vehicles, including trucks, SUVs, motorcycles, and more.
6.2 Ús com a bateria externa
The 22000mAh battery with 18W output can charge various electronic devices.
- USB-C (PD18W): Use this port to fast charge compatible smartphones, tablets, laptops, and other USB-C devices.
- USB Ports (5V/9V/12V, 5V/2.4A): Use these standard USB ports to charge other USB-powered devices.
- Simply connect your device's charging cable to the appropriate USB port on the jump starter. The unit will automatically begin charging.
6.3 Ús de la llanterna LED
La llanterna LED integrada té tres modes:
- Per encendre la llanterna: Manteniu premut el botó d'encesa durant 3 segons.
- Per canviar de mode: Press the power button briefly to switch between: Light (steady illumination) → Strobe (rapid flashing) → SOS (Morse code for distress).
- To turn off the flashlight: Press and hold the power button for 3 seconds again.

Figure 6.3: The super bright LED flashlight helps drive away all darkness, offering SOS, Strobe, and steady light modes.
6.4 Powering 15V/12V DC Devices
The 15V 10A DC output port can power various 15V or 12V DC devices.
- Connect your 15V or 12V DC device (e.g., tire inflator, car vacuum cleaner, portable refrigerator) to the 15V 10A DC output port.
- Ensure the device's power requirements do not exceed the jump starter's output capacity.
7. Manteniment
Un manteniment adequat garanteix la longevitat i el rendiment òptim del vostre arrencador.
- Recàrrega: Recharge the unit after each use. If not used frequently, recharge every 3-6 months to maintain battery health. The unit has a 24-month standby time, but regular charging is recommended.
- Neteja: Feu servir un drap suau i sec per netejar la unitat. No utilitzeu productes de neteja abrasius ni dissolvents.
- Emmagatzematge: Store the jump starter in a cool, dry place, away from direct sunlight and extreme temperatures. Keep it in its protective case when not in use.
- Clamp Atenció: Mantingueu el cl intel·ligentampnet i lliure de corrosió.
8. Solució De Problemes
If you encounter issues with your JF.EGWO F40 Jump Starter, refer to the following common problems and solutions:
| Problema | Causa possible | Solució |
|---|---|---|
| El vehicle no arrenca. | La bateria de l'arrencador de botons és baixa. Clamps no estan connectades correctament. La bateria del vehicle està greument danyada. El motor del vehicle és massa gran per a la unitat. | Recarregueu l'arrencada de salt. Assegureu-vos que clamps are firmly connected to the correct battery terminals. Consulta un mecànic professional. Verify engine displacement is within specified limits (9.0L gas / 8.0L diesel). |
| Alarm sounds / Error on display. | Connexió de polaritat inversa. Curtcircuit. Sobreescalfament. | Desconnectar clamps and reconnect correctly (Red to +, Black to -). Comproveu si hi ha objectes metàl·lics que puguin travessar el clamps. Disconnect and inspect. Allow the unit to cool down before attempting to use again. |
| La unitat no s'està carregant. | Cable o adaptador de càrrega defectuós. Port de càrrega brut. | Try a different USB-C cable and 18W (or higher) adapter. Clean the charging port gently with a dry, non-conductive tool. |
| La llanterna no funciona. | Unit battery is too low. Funcionament incorrecte. | Recarregueu l'arrencada de salt. Press and hold the power button for 3 seconds to activate. |
9. Especificacions
| Característica | Especificació |
|---|---|
| Model | F40-3750A-B |
| Corrent màxima | 3750 A |
| Capacitat de la bateria | 22000 mAh |
| Tipus de bateria | Polímer de liti |
| Voltage | 12 Volts |
| Compatibilitat del motor (gasolina) | Fins a 9.0 L |
| Compatibilitat de motors (dièsel) | Fins a 8.0 L |
| Entrada/sortida USB-C | PD18W |
| Sortida USB 1 | 5 V/9 V/12 V |
| Sortida USB 2 | 5V/2.4A |
| Sortida de corrent continu | 15V 10A |
| Temperatura de funcionament | -40 °C a 60 °C |
| Classificació impermeable | IP65 |
| Classificació ignífuga | 94V0 |
| Dimensions (L x A x A) | 22.8 x 10.4 x 4.3 cm (8.98 x 4.09 x 1.69 polzades) |
| Pes | 800 g (1.76 lliures) |
10. Garantia i assistència
The JF.EGWO F40 Jump Starter is designed for durability and reliability, featuring a 24-month standby capability for its battery.
For technical support, warranty claims, or any questions regarding your product, please contact the manufacturer or your point of purchase. Please have your model number (F40-3750A-B) and purchase details ready when contacting support.





