This spot welder can be used to weld 18650 batteries. it uses a 12v car battery as welding current supply. typically one 40ah 440a battery delivers enough current to get good welds with 0.15mm nickel strips and even 0.25mm nickel strips. for thicker nickel strips maybe you will need bigger battery. Since this is clearly awesome (because you don’t have to solder or buy a spot-welder), then…why aren’t they more common? headway cells don’t come in a variety of sizes (there are only two), and the smallest one is the 38140.. Well i took a shot at welding. seeing as the welder was already set. i think it was still set a little too hot, but oh well. shit's done. looks like bird crap now that i look closer at it and painted it. ha..
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