DIY Battery Spot Welding Pen – Threaded Tip & Copper Tube

Take your DIY battery spot welding projects to the next level with this Point Touch Spot Welding Pen. Designed for hobbyists and makers who need precise, repeatable welds on battery packs and similar assemblies, this handheld kit combines a threaded-tip welding pen with a robust copper tube connector for a reliable, easy-to-use setup.

Key Features

• Threaded Tip Locking System: The spot welding copper tip screws in securely for a firm, rattle-free hold — no slipping during use.
• 100mm Copper Core Refill Compatible: Each full 100mm copper core can be cut into 2 working sections, extending your kit's life and value.
• Copper Tube Connector: Inner diameter of 8mm accommodates a maximum cable gauge of 4 AWG (approximately 7.5mm). Simply smooth out the wire strands, twist them together, and feed them into the copper tube — reserve 10–15mm inside for a secure connection.
• Hand-Crafted Welding Needle: Each welding needle is manually processed. Please note that lengths may vary by approximately ±8mm and core diameter may vary by approximately ±2.3–2.4mm — factor this into your build planning.
• Available in 2 Color Options: Choose the style that suits your workbench setup.
• Compact & Handheld: Lightweight and ergonomically shaped for comfortable single-hand operation during detailed work.

Specifications

• Copper tube inner diameter: 8mm
• Maximum cable gauge: 4 AWG (~7.5mm)
• Refill core length: 100mm (can be split into 2 sections)
• Tip type: Threaded, tightening-fixed
• Needle tolerance: ~±8mm length, ~±2.3–2.4mm core diameter

What's in the Box

• 1× DIY Point Touch Spot Welding Pen
• 1× Copper Tube Connector
• Copper core refill (as described)

Who Is This For?

This welding pen is ideal for electronics hobbyists, battery pack builders, and DIY makers who need a compact, affordable spot welding accessory for small-scale projects. Basic wiring skills are recommended for connecting the cable to the copper tube connector.

For guidance on safe practices when working with electrical tools and DIY electronics, visit the U.S. Consumer Product Safety Commission (CPSC) for general product safety information, and OSHA's Electrical Safety resources for best practices when working with electrical equipment.

Frequently Asked Questions

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

A: This spot welding pen is a handheld accessory designed for DIY battery pack assembly and small-scale spot welding tasks. It uses a threaded copper tip that locks firmly in place and connects to a power source via a copper tube rated for up to 4 AWG (~7.5mm) cable.

Q: How do I connect the cable to the copper tube on the spot welding pen?

A: To connect a 7.5mm cable to the copper tube, first smooth out the individual wire strands, then twist them together into a tight bundle. Slowly feed the twisted end into the 8mm inner-diameter copper tube, leaving approximately 10–15mm of wire inside the tube for a secure fit.

Q: Can I replace the welding tip/core?

A: Yes! The welding copper core is compatible with standard 100mm refill cores. Simply cut a 100mm core into 2 equal sections and insert them as needed. The threaded tip design makes swapping cores quick and easy.

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

A: Yes — because the welding needles are manually processed, please allow for approximately ±8mm in length and ±2.3–2.4mm in core diameter. Review these tolerances against your project requirements before purchasing.