I believe "a million times as much charge" refers to the total energy content in Joules. The parent was referring to voltage. The original press release from

I believe "a million times as much charge" refers to the total energy content in Joules. The parent was referring to voltage. The original press release from missouri.edu: http://munews.missouri.edu/news-releases/2009/1007-mu-researchers-create-smaller-and-more-efficient-nuclear-battery/ http://munews.missouri.edu/news-releases/2009/1007-mu-resear... It references a published paper (likely behind a pay wall), otherwise the content is almost identical to the original link.