Jim,
Here is an article describing the challenges associated with betavoltaic batteries [1]. The recent buzz over the 30 year battery, while intriguing, is overly optimistic. As stated in the article I linked to, betavoltaics currently have low efficiency, require heavy shielding, and the energy absorption media tends to degrade due to the high energy bombardment. I think it would be great if they could overcome these issues, but it looks like it may be 30 years before we see anything like a 30 year battery. – Mark D. in Utah
Mr Rawles,
Firstly I would like to say that after recently having found your site, I now read it daily. Thank you for all your hard work. Hopefully I will be able to meet the 10 Cent Challenge [2] in the next few weeks.
Regarding the 30 year battery and betavoltaics, there are many basic problems with such a battery design. I am not an expert in this field, however the article does make some amount of sense on a fundamental level. I wouldn’t hold your breath for a 30 year battery any time soon. Sincerely, – Derek from New York City (God help me)