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12V DIY Spot Welder Machine PCB Circuit Board Kit
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The Faraday 12V DIY Spot Welder Kit is a compact and efficient spot-welding solution designed for makers, hobbyists, and battery-pack builders. Built on a single-chip microcomputer system, this portable spot welder provides stable performance, strong output current, and reliable welding for 18650, 26650, and 32650 lithium batteries.
The PCB is designed with widened MOSFET paths and reinforced copper/tin plating options, reducing internal resistance and ensuring higher welding efficiency even during heavy-duty use.
Engineered for convenience, the kit includes external pads for connecting LEDs and onboard buttons, allowing flexible placement during assembly. Powered by a 12V rechargeable battery, it’s lightweight, sturdy, and built to deliver long-term durability.
Whether you’re assembling battery packs, repairing electronics, or working on DIY energy-storage projects, this spot welder kit offers a powerful and user-friendly solution.

| Type | DIY Spot Welding Machine |
|---|---|
| Model | RS5142 |
| Material | PCB |
| Operating Voltage | 12V |
| Color | Black |
| Design | Single-chip microcontroller based |
| Capacitor | 25V low internal resistance, high-frequency |
| Supported Battery Types | 18650 / 26650 / 32650 |
| Special Features | External LED/button pads, MOSFET-enhanced circuitry |
| Portability | Lightweight & rechargeable battery powered |