This 45mm Titanium Keychain Glows for 25 Years Without Batteries Using Pure Material Physics
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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. This is why tritium appears in emergency exit signs, military watches, and aviation instruments. The glow is faint compared to an LED, but the reliability is absolute. Nothing else in the consumer lighting world can claim 25 years of o
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