This article indicated the Diamond Battery is formed which a diamond is placed into a "radioactive field" and includes a linked page for "radioactive field". The linked article is about radioactive decay. There is no definition of "radioactive field". Similarly, the reference [#2] for the term radioactive field is itself just a poplar science article in which the inventors of the diamond battery announce their results. Basically, this appears to have been fabricated to give the appearances of legitimate science background for a dubious if not fraudulent scientific claim.