I did really need a spot welder though, and there was no shortage of examples of people who had built their own from supercapacitors, typically in the 500 F range.

Spot Welder, Seesii 10000ma-h Portable Spot Welder Enhanced 99 Gears Adjustable with LCD Colorful Display Mini Spot Welder for Real 0.1-0.25mm Nickel Sheet Battery Welding ...

The company noted that the i5s is only spot welder on the market with Wi-Fi connectivity, which enables instant updates, data exports and email capability of the weld logs for performance reporting.

Our Bright Spot shines on new graduates. A graduation ceremony was held Monday, April 21, 2025, for the second cohort of the Rochester Educational Opportunity Center's (REOC) mobile welding lab.

For example, Home Depot's cheapest comparative stud welder kit is $147.20, with its cheapest 120-volt spot welder sitting at $179.95. For a 240-volt piece, you're looking at a cost of over $200 .

I find myself in need of welding 40 18650 cells into a pack to rebuild a dead pack. It seems the normal method of doing this is spot welding the batteries together with thin nickel sheet.