SMRTR Science & EngineeringApr 20, 2026The Register

You too can build a nuclear battery from junk you have lying around the house

SMRTR summary

A YouTuber demonstrated how to build a nuclear battery using everyday items like old calculator solar cells, tritium gas vials from keychains, and tin foil, creating a device that produces tiny amounts of electricity for about 12 years through radioactive decay exciting phosphor coatings that generate light for the solar cells.

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