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1 hour agoThis 45mm Titanium Keychain Glows for 25 Years Without Batteries Using Pure Material Physics - Yanko Design
Tritium is a hydrogen isotope with a half-life of 12.3 years. As it decays, beta particles strike a phosphor coating and produce light. The process requires no electricity, no chemical reaction, and no external energy. It simply happens, continuously, for decades.
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