I'm not sure what (aside from marketing) sets these aside from traditional betavoltaic batteries: https://en.wikipedia.org/wiki/Betavoltaic_device https://en.wi

I'm not sure what (aside from marketing) sets these aside from traditional betavoltaic batteries: https://en.wikipedia.org/wiki/Betavoltaic_device https://en.wikipedia.org/wiki/Betavoltaic_device