3MM Copper Oxide Spot Welding Needles for 18650 Battery | 2/5/10Pc

Double-Head Copper Oxide Spot Welding Electrode Needles – 3×50mm

Upgrade your battery spot welding setup with these precision-crafted 3MM purple copper oxide double-head electrode needles. Designed specifically for use with 18650 power batteries, these consumable tips deliver consistent, clean contact for reliable spot welds every time. Available in convenient packs of 2, 5, or 10 so you always have spares on hand.

Key Features

• Premium Copper Construction: Made from high-quality copper with a copper oxide surface treatment for improved conductivity and extended tip life.
• Double-Head Design: Both ends are usable, effectively doubling the working life of each needle and reducing replacement frequency.
• Optimized for 18650 Batteries: Purpose-built electrode geometry ensures precise, focused welds on 18650 power battery packs and similar battery assemblies.
• Consistent Dimensions: Each needle measures 3×50mm for a standardized, repeatable fit in compatible spot welding pens and machines.
• Multi-Pack Options: Choose from 2, 5, or 10-piece packs to suit your project scale and stocking needs.
• Easy Replacement: Quick-swap design means minimal downtime between welds — simply replace the tip and continue working.

Specifications

• Material: Copper (copper oxide electrode head)
• Size: 3×50mm
• Type: Double-head spot welding needle
• Pack Quantity: 2 / 5 / 10 pieces
• Compatible With: 18650 power batteries and similar lithium battery spot welding applications
• Made in Mainland China

What's in the Box?

• 2, 5, or 10× Copper Oxide Double-Head Spot Welding Needles (3×50mm)

Note: Please allow 2–3% dimensional variance due to manual measurement. Actual product color may vary slightly from images depending on monitor settings.

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Frequently Asked Questions

Q: What spot welding machines are these 3MM copper oxide electrode needles compatible with?

A: These 3×50mm double-head spot welding needles are designed to fit most standard spot welding pens and machines that accept 3MM electrode tips, commonly used for 18650 lithium battery pack assembly and repair. Always check your machine's tip diameter specification before ordering.

Q: Why choose copper oxide electrode needles over standard copper tips?

A: Copper oxide (purple copper) electrode heads offer enhanced surface hardness and oxidation resistance compared to bare copper, resulting in more consistent electrical contact, reduced tip wear, and longer service life — making them a popular choice among battery pack builders and electronics hobbyists.

Q: Can I use both ends of the double-head needle?

A: Yes! The double-head design means both ends of each needle are functional electrode tips. Once one end wears down, simply flip the needle and continue welding, effectively doubling the usable life of each piece.

Q: How many pieces should I order?

A: For occasional hobbyist use, the 2-pack is a great starting point. For regular battery pack builds or workshop use, the 5- or 10-piece packs offer better value and ensure you always have fresh tips available.