More efficient conversion of radiation to electricity

Tweet Tritium batteries can provide power to devices for decades The BetaBatt will not be the first battery to harness a radioactive source, or even the first to use tritium, but the new cell will have a unique advantage - the half-millimeter-thick silicon wafer into which researchers have etched a network of deep pores. This structure vastly increases the exposed surface area, creating a device that is 10 times more efficient than planar designs.

Betabatt discusses the advantages here. The first and second generations of tritium-powered BetaBatteries are expected to produce 50- and 125-micro-Watts per cubic centimeter of active device volume