It is not clear that they have a real working prototype.
The current is very low, only 100uW, and there are similar batteries made with tritium. More info in a video by EEVblog eevblog had a good video about this product: https://www.youtube.com/watch?v=uzV_uzSTCTM (it's old, but I can't find any evidence of improvements.)
It is not clear that they have a real working prototype.
The current is very low, only 100uW, and there are similar batteries made with tritium. More info in a video by EEVblog eevblog had a good video about this product: https://www.youtube.com/watch?v=uzV_uzSTCTM (it's old, but I can't find any evidence of improvements.)
Also, there is a calculation of the low the maximal current per kilogram in http://nanoscale.blogspot.com/2020/08/diamond-batteries-unli...