Oh, RTG pacemakers were already betavoltaic [1]. So this is really an incremental improvement on existing tech. [1] https://en.wikipedia.org/wiki/Betavoltaic_

Oh, RTG pacemakers were already betavoltaic [1]. So this is really an incremental improvement on existing tech. [1] https://en.wikipedia.org/wiki/Betavoltaic_device https://en.wikipedia.org/wiki/Betavoltaic_device.