DIY Battery Spot Welding Pen – Threaded Tip, Copper Tube

Take your DIY electronics and battery projects to the next level with this Point Touch Spot Welding Pen. Engineered for hobbyists and makers, this handheld copper-core welding pen delivers precise, controlled contact welding — perfect for building battery packs, repairing electronics, and more. Available in 2 color options to suit your workbench setup.

Key Features

• Threaded Tip Locking System: The tip is a threaded tightening fixed type, ensuring a secure hold during use — no slippage mid-weld.
• Copper Tube Construction: Inner diameter of 8mm, supporting a maximum cable gauge of 4 AWG (approx. 7.5mm) for robust, low-resistance connections.
• Versatile Welding Core: Compatible with a standard 100mm complete refill, which can be cut into 2 sections for extended use — giving you more value per refill.
• Manually Processed Welding Needle: Precision hand-finished spot welding needle with a core diameter of approximately 2.3–2.4mm. Please allow for a length tolerance of approximately 8mm due to the manual processing method.
• DIY-Friendly Design: Designed for enthusiasts who want hands-on control. Wiring requires basic skill — simply smooth out and twist a 7.5mm cable, then guide it slowly into the copper tube (reserve 10–15mm for secure seating).
• Handheld & Portable: Lightweight and easy to maneuver, making it ideal for precise spot welding tasks in tight spaces.

Specifications

• Copper Tube Inner Diameter: 8mm
• Maximum Cable Gauge: 4 AWG (~7.5mm)
• Welding Needle Core Diameter: ~2.3–2.4mm (manual processing tolerance applies)
• Needle Length Tolerance: ~8mm
• Compatible Refill Length: 100mm (can be cut into 2 sections)
• Color Options: 2 available
• Brand: Qme

Who Is This For?

Whether you're assembling lithium battery packs, doing electronics repairs, or tackling a custom DIY project, this spot welding pen gives you the control and precision you need. It's a go-to tool for makers, hobbyists, and electronics enthusiasts who demand reliable, repeatable welds.

Safety & Best Practices

Always follow proper electrical safety practices when working with spot welding equipment. For guidance on electrical safety in DIY projects, refer to resources from the U.S. Consumer Product Safety Commission (CPSC).

Frequently Asked Questions

Q: What is the DIY Point Touch Spot Welding Pen used for?

A: This spot welding pen is designed for DIY battery pack assembly, electronics repair, and hands-on maker projects. It provides precise, handheld contact welding using a threaded, fixed copper-core tip — ideal for hobbyists working with battery cells or small electronic components.

Q: What cable size is compatible with the copper tube?

A: The copper tube has an inner diameter of 8mm and supports a maximum cable gauge of 4 AWG (approximately 7.5mm). To connect, smooth out the cable, twist the strands together, and guide them slowly into the copper tube, leaving 10–15mm of cable extended for a secure connection.

Q: How does the welding tip work and how do I replace it?

A: The welding tip uses a threaded tightening system for a fixed, stable hold during spot welding. The copper core is compatible with a standard 100mm refill, which you can cut into two sections for extended use. Simply thread the new tip in securely before beginning your project.

Q: Are there size tolerances I should be aware of before purchasing?

A: Yes — because the welding needles are manually processed, please allow for an approximate length tolerance of 8mm and a core diameter range of 2.3–2.4mm. Review these specifications carefully to ensure compatibility with your project before ordering.