From a site with a section on "Free energy."
Be afraid.
"The reason the battery lasts so long is that neutron beta-decay into protons is the world's most concentrated source of electricity, truly demonstrating Einstein?s theory E=MC2."
Okay then. That's new to me.
The grammar and punctuation is excellent, too.
"Although betavoltaic batteries sound Nuclear they?re not, they?re neither use fission/fusion or chemical processes to produce energy and so (do not produce any radioactive or hazardous waste).
"The profile of the batteries can be quite small and thin, a porous silicon material is used to collect the hydrogen isotope tritium which is generated in the process. "
Tritium? So it collects it and does what with it? Tritium is radioactive.
And let's see, if neutrons are decaying into beta particles and protons, then why is this stuff producing neutrons, which then magically bind to hydrogen to produce that tritium?
Next they'll be harvesting the power of sunspots to produce cognitive radiation.