Whoa, that's a cool mechanism and even a modest volume would seem to generate quite a bit more power than the clock needs. Betavoltaics are another cool one.

Whoa, that's a cool mechanism and even a modest volume would seem to generate quite a bit more power than the clock needs. Betavoltaics are another cool one. You wrap a beta emitter (like tritium) with a solid state 'betavoltaic' that works like a photovoltaic but for beta particles. These are commercially available and will provide microwatts of power at 1-2v for for 30+ years. (With the downside of a bunch of possible health/waste/regulatory implications) https://en.wikipedia.org/wiki/Betavoltaic_device https://en.wikipedia.org/wiki/Betavoltaic_device https://citylabs.net/products/ https://citylabs.net/products/ RTGs are their bigger/badder cousins, used for space probes and super-remote monitoring/military applications - https://en.wikipedia.org/wiki/Radioisotope_thermoelectric_generator https://en.wikipedia.org/wiki/Radioisotope_thermoelectric_ge...