Exactly. The battery life of a Casio F-91W is roughly seven years, without recharging at all. Or think of those tritium markers that continously glow for more t

Exactly. The battery life of a Casio F-91W is roughly seven years, without recharging at all. Or think of those tritium markers that continously glow for more than ten years. Can't they power an Apple watch on tritium?