12V 90–150A DIY Battery Spot Welding PCB Board 126L for 18650
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Prices updated: 14 Oct 2026
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About this product
A 12 V spot welding PCB board for building a DIY portable spot welder for lithium battery pack assembly. It delivers a 90–150 A pulse current and supports nickel strip welding on 18650, 26650, and 32650 cells. Intended for hobbyists, battery repair, and pack production projects.
Specifications
- Supply voltage
- 12 V
- Pulse current
- 90–150 A
- Compatible cells
- 18650, 26650, 32650
- Welding material
- Nickel strip
- Type
- DIY spot welder PCB
Frequently asked questions
Does the board need a separate controller or power source?
The board is designed for a 12 V supply, so make sure your supply and wiring can handle high pulse currents. The listing does not state whether a separate controller is required, so check the board's connection details before wiring it.
What safety precautions apply when welding 18650 cells?
Use fresh, undamaged cells and short pulses. Overheating or damaging a lithium cell can cause a fire, so do not weld swollen or damaged cells, wear eye protection, and keep a fire extinguisher nearby.
