One of the most expensive 18650 spot welding machine.

I intended to use 4S4P lifepo4 batts, but I was not successfull. This board sucks huge current during spot welding. So I tried to use Lithium Titanate Oxide.

I got a clean spot weld. :-) push button or foot switch is not required. Once the electrodes touch the metal, it will trigger automatically

I will try high drain batts for my next experiment.

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