Spot Welder 12V Portable Battery Welding Kit

This 12V Portable Spot Welder is a DIY battery energy-storage welding kit designed for welding nickel strips onto 18650, 26650, and 32650 lithium-ion cells, making it a practical tool for anyone building or repairing battery packs. Powered by an external 12V source such as a car battery or lead-acid battery, the circuit board converts stored energy into short, controlled welding pulses strong enough to fuse thin nickel sheets without damaging the cells underneath. It is a popular choice among hobbyists, EV and power tool enthusiasts, and makers assembling custom battery packs for electric bikes, power banks, drones, and other DIY electronics projects. The kit typically includes an automatic trigger welding pen, buzzer, input and output wiring, and adjustable gear settings that let users fine-tune weld strength from light to heavy, with audible and visual feedback for each setting. Its compact, portable design means it can be paired with almost any suitable 12V power source, keeping costs low compared to dedicated commercial spot welders. Basic soldering and wiring knowledge is recommended for assembly, and users should follow safety precautions regarding wire gauge and battery internal resistance to prevent component overload. Reliable, affordable, and straightforward to operate once assembled, this spot welder is an excellent addition to any battery-building workbench.

Specification:

• Input Power : 12V – 14.6V DC (External Battery Required)
• Welding Current : 90A – 130A (typical)
• Nickel Strip Thickness : 0.1mm – 0.15mm
• Trigger Mode : Automatic
• Weld Strength Settings : 5 Adjustable Gears
• Compatible Cells : 18650 / 26650 / 32650 Lithium Batteries
• Feedback Indicators : Buzzer & LED