University of Bristol responds to Dave's debunking video.
https://newatlas.com/energy/arkenlight-nuclear-diamond-batteries/
The second thing is that this is a major game changer. We now have efficiencies where this becomes commercially relevant. It would still be considered a microbattery, but say for example, 200 microwatts. That's how much energy is needed to power a pacemaker.
For a single microwatt, we're talking about something 4 mm x 4 mm (0.15 x 0.15 in) in width and length, that's very, very shallow. The size of a fingernail, but thinner. You can mechanically stack these in any number.
Well, a device that's 10-mm (0.39-in) square, and less than 0.5 mm (0.019 in) in depth, would yield tens of microwatts. The amount of carbon-14 you'd need to power a cell phone would be about the size of a tub of vegetable spread. It can be done, but the physical bounds of carbon-14 diamond would require a mass greater than the phone itself.
So nothing has really changed here.
AA battery = 50x14mm = 2500mm
24x4x0.5mm claimed 1uW = 8mm
2So theoretically a perfectly packed AA battery would be ~300uW. Which is not bad, but realistically with the supercap and other stuff in there, ~100uW sounds about right.