NDB is 56,966 times more energy dense than Li-ion batteries such as 2170 and 18650 battery. In addition, there is no disposal of toxic lithium waste.
NDB is 4,156 times more energy dense than gasoline. Not only that, it also does not produce any emission.
NDB is up to 14.29 times more efficient than radioisotope thermoelectric generators. It is also able to generate electricity from most types of radiations.
NDB is up to 16.6 times more efficient than a typical betavoltaic and it can use most types of ionizing energetic electrons, not just one.