Mini Spot Welder Super Capacitor 18650 Battery DIY Tool

Mini Portable Spot Welder with Super Capacitor Energy Storage

Take your DIY battery projects to the next level with this compact and capable Mini Portable Spot Welder. Powered by a high-capacity super capacitor (2.7V / 3000F Farad capacitor), this machine delivers fast, consistent welds on nickel strips and stainless steel — making it ideal for building or repairing 18650 battery packs, power banks, and other DIY electronics projects at home.

Whether you're a hobbyist assembling custom battery packs or an electronics enthusiast looking for a reliable benchtop tool, this spot welder offers professional-grade performance in a portable, easy-to-use design. Made in Mainland China.

Key Features

• Super Capacitor Technology: Single 2.7V / 3000F Farad capacitor stores energy for fast, powerful discharge welds — no battery degradation over time
• Versatile Welding Capability: Handles 0.2mm pure nickel, 0.3mm nickel-plated strips, and 0.4mm stainless steel
• Removable & Replaceable Welding Pen: Easy to swap out for different tasks or when worn
• Bilingual Interface: English and Chinese language system for broad accessibility
• Compact & Portable Design: ABS shell housing, dimensions 218×130×70mm, weighing just 2.17kg
• Wide Temperature Range: Operates between 0°C and +75°C for stable performance in various environments
• DC 12V / 4A Input: Safe, low-voltage power supply input for home and workshop use

Specifications

• Welding Thickness: 0.2mm pure nickel / 0.3mm nickel-plated / 0.4mm stainless steel
• Input Power: DC 12V, 4A
• Capacitor: Single 2.7V / 3000F Farad super capacitor
• Temperature Range: 0°C to +75°C
• Shell Material: ABS
• Dimensions: 218 × 130 × 70mm
• Weight: 2.17kg
• Language: English / Chinese
• Origin: Made in Mainland China

What's in the Box

• 1 × Portable Spot Welding Machine Set

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Frequently Asked Questions

Q: What materials can this mini spot welder weld?

A: This portable spot welder is designed to weld 0.2mm pure nickel strips, 0.3mm nickel-plated strips, and 0.4mm stainless steel — making it well-suited for 18650 battery pack assembly and similar DIY electronics projects.

Q: What power supply does the spot welder require?

A: The machine operates on a DC 12V / 4A input power supply, which is a safe and widely available voltage for home workshop use.

Q: What is the super capacitor and why does it matter?

A: The super capacitor (2.7V / 3000F Farad) stores and discharges energy rapidly, delivering consistent, high-current weld pulses without the degradation associated with traditional battery-powered welders. This means more reliable welds over a longer product lifespan.

Q: Is the welding pen replaceable?

A: Yes! The welding pen is fully removable and replaceable, allowing you to swap it out when worn or change configurations for different welding tasks.

Q: Is this spot welder suitable for beginners?

A: Yes. The compact design, bilingual interface (English and Chinese), and straightforward controls make this spot welder accessible for DIY hobbyists and electronics enthusiasts building or repairing battery packs at home.

Production & Packaging Notice

To maintain high stock availability and fast shipping times, our items are sourced from multiple verified manufacturing facilities. While the core quality, materials, and product specifications remain identical, you may notice slight variations in the packaging design, manufacturing origin, or the wording of the printed instructions.