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Spot-welding with Capacitors

A truly flashing lab aid

Spot-welding with Capacitors
Repairing the connection between two cells in a battery pack actually requires specialised welding equipment. Alas, that kind of gear is expensive, and soldering is not an option either. So we cook up another solution, in this case using dead common electrolytic capacitors, conveniently abusing their ability to deliver brief, high current pulses for none other purpose than… welding!
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