Introduction
Thank you for choosing the Technaxx TX-120 12000mAh Jump Starter. This device is designed to provide emergency jump-starting for vehicles, as well as portable power for charging electronic devices. Please read this manual thoroughly before using the product to ensure safe and efficient operation. Keep this manual for future reference.
Safety Instructions
Always observe the following safety precautions to prevent injury or damage to the device and vehicle:
- Do not attempt to jump-start a vehicle with a completely frozen battery.
- Ensure proper polarity when connecting the jump starter clamps to the vehicle battery. Incorrect connection can cause sparks, fire, or damage.
- Do not allow the red and black clamps to touch each other, as this can cause a short circuit.
- Keep the device away from children.
- Do not expose the device to rain, water, or extreme temperatures.
- Do not disassemble or modify the device. Servicing should only be performed by qualified personnel.
- Wear eye protection and gloves when working with vehicle batteries.
- If battery acid comes into contact with skin or eyes, flush immediately with plenty of clean water and seek medical attention.
- Ensure the vehicle is in park (P) or neutral (N) with the parking brake engaged before attempting to jump-start.
Package Contents
Verify that all items are present in the package:
- Technaxx Jump Starter 12000mAh TX-120 (Main Unit)
- Battery Clamps with Cable
- Micro USB Charging Cable
- Car Charger
- Cigarette Lighter Adapter
- User Manual (this document)

Image: The Technaxx TX-120 Jump Starter with all its accessories, including the main unit, battery clamps, various charging cables, and adapters, neatly arranged on a white surface.
Product Overview
The Technaxx TX-120 is a versatile device featuring a powerful 12000mAh lithium-polymer battery. It serves as an emergency jump starter for vehicles, a portable power bank for USB devices, and includes an integrated LED flashlight.

Image: The Technaxx TX-120 Jump Starter main unit shown alongside its red and black battery clamps, highlighting the compact design of the jump starter and the robust construction of the clamps.
Charging the Jump Starter
Before first use, fully charge the Technaxx TX-120. It is recommended to recharge the device every 3-6 months to maintain battery health, even when not in use.
- Connect the Micro USB charging cable to the input port on the jump starter.
- Connect the other end of the Micro USB cable to a USB power source (e.g., car charger, wall adapter, or computer USB port).
- The LED indicators on the jump starter will illuminate to show the charging progress. All LEDs will be solid when fully charged.
Setup and Operating Instructions
Using as a Vehicle Jump Starter
Ensure the jump starter is at least 75% charged (three LED indicators lit) before attempting to jump-start a vehicle.
- Turn off the vehicle's ignition and all accessories (lights, radio, etc.).
- Connect the blue plug of the battery clamps cable to the jump starter's dedicated jump-start port. Ensure a firm connection.
- Connect the red positive (+) clamp to the vehicle's positive (+) battery terminal.
- Connect the black negative (-) clamp to the vehicle's negative (-) battery terminal or a solid, unpainted metal part of the engine block (ground point).
- Once connected, the indicator on the smart clamp will show its status. If it's green, you can proceed. If it's red or flashing, check connections or refer to troubleshooting.
- Start the vehicle's engine. If it doesn't start immediately, wait 30 seconds before trying again. Do not crank for more than 3 seconds per attempt.
- Once the vehicle starts, immediately disconnect the black negative (-) clamp first, then the red positive (+) clamp.
- Finally, disconnect the battery clamps cable from the jump starter.

Image: The Technaxx TX-120 Jump Starter connected to a car battery with its red and black clamps, demonstrating the correct setup for jump-starting a vehicle.
Using as a Portable Power Bank (USB Output)
The TX-120 can charge various USB-powered devices such as smartphones, tablets, and cameras.
- Connect your device's USB charging cable to one of the USB output ports on the jump starter.
- The jump starter will automatically begin charging your device. The LED indicators will show the remaining power level.
- Disconnect your device once charging is complete.

Image: The Technaxx TX-120 Jump Starter connected via USB cable to a smartphone, illustrating its function as a portable power bank for electronic devices.
Using the LED Flashlight
The integrated LED flashlight provides illumination for various situations.
- Press and hold the power button for a few seconds to turn on the flashlight.
- Press the power button briefly to cycle through different light modes (e.g., steady on, strobe, SOS).
- Press and hold the power button again to turn off the flashlight.

Image: The Technaxx TX-120 Jump Starter with its built-in LED flashlight activated, casting a bright beam of light, demonstrating its utility as an emergency light source.
Maintenance
- Storage: Store the jump starter in a cool, dry place away from direct sunlight and moisture. Keep it in its carrying case to protect it from dust and damage.
- Charging: Recharge the device every 3-6 months to maintain optimal battery performance, even if it has not been used.
- Cleaning: Clean the exterior of the device with a soft, dry cloth. Do not use harsh chemicals or abrasive cleaners.
- Battery Care: Avoid fully discharging the battery frequently, as this can reduce its lifespan.
Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Vehicle does not start | Jump starter battery is low. | Recharge the jump starter. Ensure it has at least 3 LED indicators lit. |
| Incorrect clamp connection. | Check that the red clamp is on the positive (+) terminal and the black clamp is on the negative (-) terminal or a good ground point. Ensure connections are secure. | |
| Vehicle battery is severely damaged or completely dead. | The jump starter may not be able to start a completely dead battery. Seek professional assistance. | |
| Jump starter not charging | Charging cable or adapter is faulty. | Try a different Micro USB cable and/or USB power adapter. |
| Charging port is dirty or damaged. | Inspect the charging port for debris. Do not force connections. | |
| USB devices not charging | Jump starter battery is low. | Recharge the jump starter. |
| USB cable is faulty or incompatible. | Try a different USB cable. Ensure the cable is suitable for your device. |
Specifications
- Model Number: 4818
- Battery Type: Lithium-polymer (1 included)
- Battery Capacity: 12000 mAh
- Voltage: 12 Volts
- Amperage: 400 A
- Dimensions (L x W x H): 16.2 x 8.5 x 3 cm
- Weight: 400 Grams
- Compatible Vehicle Types: Motorcycle, Tractor, Car
- Manufacturer: TECHNAXX
- EAN: 04260358123684
Warranty and Support
Technaxx products are covered by a limited warranty. For detailed warranty information, technical support, or service inquiries, please refer to the warranty card included with your product or visit the official Technaxx website. Please retain your proof of purchase for warranty claims.





