1. Introduction
This manual provides detailed instructions for the safe and effective operation, setup, maintenance, and troubleshooting of your AWithZ U3 7500mAh Battery Spot Welder. Please read this manual thoroughly before using the device to ensure proper function and safety.
The AWithZ U3 is a portable spot welder designed for assembling battery packs, including 18650 and 21700 cells. It features a 2-inch LCD screen, 90 adjustable gear settings, and supports welding nickel-plated sheets up to 0.35mm thick. Enhanced functions include preheating, intermittent, and continuous spot welding modes.
2. Safety Information
Always prioritize safety when operating the spot welder. Failure to follow safety guidelines can result in injury or damage to the device.
- Wear appropriate personal protective equipment (PPE), including safety glasses, when operating the spot welder.
- Ensure the work area is well-ventilated and free from flammable materials.
- Do not operate the device with wet hands or in damp conditions.
- Avoid touching the welding pens or welded material immediately after welding, as they will be hot.
- Keep the device out of reach of children.
- Only use the provided accessories and charging cable.
- Do not attempt to weld materials thicker than specified or materials not suitable for spot welding (e.g., pure copper).
- If the device shows signs of damage or malfunction, discontinue use immediately.
3. Package Contents
Verify that all items are present in the package:
- AWithZ U3 Spot Welder Unit
- Spot Welding Pens (2 pieces)
- Nickel Plates (for practice and use)
- Grinding Gauze (for pen maintenance)
- USB Type-C Charging Cable
- English Instruction Manual
Image 3.1: AWithZ U3 Spot Welder with welding pens, nickel strips, grinding gauze, and charging cable.
4. Product Overview
4.1. Components
- Main Unit: Houses the battery, control circuitry, and display.
- Welding Output Terminals: Two gold-plated terminals for connecting the spot welding pens.
- 2-inch LCD Screen: Displays welding parameters, battery status, and settings.
- Control Buttons: Used for navigation and adjusting settings.
- USB-C Port: For charging the device.
4.2. Display Interface
The 2-inch LCD screen features a 9-grid design for intuitive operation. It displays key information such as voltage, current, welding mode, preheating time, intermittent time, trigger time, gear setting, and number of continuous spot welds.
Image 4.1: Close-up of the AWithZ U3's 2-inch colorful LCD screen displaying various welding parameters and settings.
Image 4.2: Detailed view of the AWithZ U3's user interface, highlighting adjustable parameters like welding mode, preheating time, gear, and continuous spot welding count.
5. Setup
5.1. Initial Charging and Activation
Upon first use or after prolonged storage, the spot welder may require activation. Connect the device to a 5V/2A power source using the provided USB-C cable. Charge for approximately 30 minutes to reactivate the unit.
Image 5.1: The AWithZ U3 unit connected via USB-C, illustrating its charging capability and 7500mAh battery.
5.2. Removing Screen Protective Film
The LCD screen comes with a protective film. Carefully peel off this film using tweezers or your fingernail to ensure clear visibility of the display.
Video 5.1: Demonstration of how to remove the protective film from the AWithZ U3 spot welder's screen to prevent scratches and improve clarity.
5.3. Installing Spot Welding Pens
Insert the copper plugs of the spot welding pens firmly into the two gold-plated output terminals on the top of the main unit.
6. Operating Instructions
6.1. Power On/Off
Press and hold the power button (usually the top right button) for 2 seconds to turn the device on or off.
Video 6.1: A comprehensive guide on how to use the AWithZ Battery Spot Welder, covering power on, basic settings, and welding process.
6.2. Navigating the User Interface
The device features a 9-grid display. Use the adjustment buttons (typically the two buttons on the right side) to navigate through the options and adjust values. The top button usually moves between options, and the bottom button adjusts the selected value.
6.3. Adjusting Welding Parameters
The AWithZ U3 offers several adjustable parameters to optimize welding for different materials and thicknesses:
- Welding Mode: Select between Auto and Manual. Auto mode detects contact and welds automatically. Manual mode requires pressing a button on the welding pen (if available) or a trigger button on the unit to initiate a weld.
- Preheating Time: Adjustable from 1ms to 10ms. Preheating helps remove the oxide layer for a stronger weld.
- Intermittent Time: Sets the delay between multiple spot welds in continuous mode.
- Gear: 90 adjustable gears (1.0-9.0, with decimal increments). Higher gears provide more power. Start with lower gears and increase as needed.
- Trigger Time: Adjustable from 0.5s to 3.0s. This sets the duration the welding current is applied.
- Number of Continuous Spot Welding: Sets the number of consecutive spot welds (up to 3) for enhanced strength.
Image 6.1: Visual guide for continuous spot welding, showing recommended gear settings for 0.15mm, 0.25mm, and 0.35mm nickel sheet thicknesses.
Video 6.2: Demonstration of the continuous spot welding function on the AWithZ U3 spot welder, showing multiple welds in quick succession.
Video 6.3: AWithZ U3 spot welder in action, demonstrating its capability to weld 0.3mm nickel plates onto battery cells.
6.4. Welding Techniques
- Placement: Ensure the nickel strip is clean and flat against the battery terminal.
- Pressure: Apply firm, even pressure with both welding pens to the nickel strip.
- Positioning: Weld on the edge of the nickel piece for a firmer connection, rather than directly in the middle.
- Practice: Always practice on scrap nickel strips and old batteries first, starting with the minimum gear setting, to find the optimal settings for your specific materials.
Image 6.2: Step-by-step visual instructions for using the AWithZ U3 spot welder, from initial charging to the welding process.
6.5. Language Selection
To quickly switch the UI language, press the three control buttons simultaneously. The device supports 7 UI languages.
Image 6.3: The language selection menu on the AWithZ U3 spot welder's display.
6.6. Screen Rotation
The display screen supports 180-degree rotation for optimal viewing angle. This setting can typically be found within the system settings menu.
7. Maintenance
7.1. Cleaning Welding Pen Tips
Over time, the tips of the spot welding pens may accumulate residue, affecting welding performance. Use the provided grinding gauze to gently clean the tips, ensuring good electrical contact.
7.2. General Care
- Store the device in a dry, cool place away from direct sunlight and moisture.
- Keep the device and accessories clean. Use a soft, dry cloth for cleaning.
- Avoid dropping or subjecting the device to strong impacts.
8. Troubleshooting
If you encounter issues with your AWithZ U3 Spot Welder, refer to the following common problems and solutions:
- Device does not power on: Ensure the device is sufficiently charged. If it has been stored for a long time, charge it for at least 30 minutes to reactivate.
- Poor weld quality (weak or no weld):
- Check that the welding pen tips are clean and sharp. Clean with grinding gauze if necessary.
- Increase the gear setting. Start with a low gear and gradually increase until a strong weld is achieved.
- Ensure firm and even pressure is applied to both welding pens.
- Verify the nickel strip and battery terminals are clean and free of oxidation.
- Confirm the material thickness is within the device's capabilities (up to 0.35mm nickel-plated sheet).
- Screen appears scratched or unclear: The screen may have a protective film. Carefully remove it as shown in Video 5.1.
- Device settings are incorrect or unresponsive: You can restore factory settings through the system settings menu. Alternatively, simultaneously press and hold the "Manual Spot Welding Key" and "Power ON/OFF Key" to quickly reset values.
- Screen orientation is inconvenient: Adjust the screen rotation setting in the system menu.
9. Specifications
| Feature | Specification |
|---|---|
| Model | U3 |
| Brand | AWithZ |
| Battery Capacity | 7500mAh (Lithium Polymer) |
| Charging Input | 5V/2A (USB Type-C) |
| Full Charge Time | Approximately 3.5 hours |
| Display | 2-inch LCD Screen |
| Adjustable Gears | 90 (1.0-9.0) |
| Max Welding Thickness | 0.35mm (Nickel-plated sheet) |
| Welding Modes | Auto, Manual, Preheating, Intermittent, Continuous |
| UI Languages | 7 languages supported |
| Screen Rotation | 180 degrees |
| Item Weight | 1.5 pounds |
| Package Dimensions | 7.8 x 4.33 x 2.52 inches |
| Manufacturer | Shenzhen Jueqi Technology Co., Ltd |
Image 9.1: Compatibility chart for the AWithZ U3 spot welder, detailing supported battery types and weldable materials.
10. Warranty and Support
The AWithZ U3 Battery Spot Welder comes with a one-year warranty from the date of purchase. AWithZ also provides lifelong technical guidance for its products.
For technical assistance, warranty claims, or any questions regarding your device, please contact AWithZ customer support through the retailer where the product was purchased or refer to the contact information provided in your product packaging.