Hmm, without a datasheet, its very difficult to asses how useful it is.<p>Does it have the RF harvesting bits built in? or is it a bunch of passives that I have to add after.<p>How low power is it? are we talking microamps per mhz(I know we're not...) How much useful time do you have per charge cycle?<p>the articles section seems to be full of generic health mumbojumbo, which isnt a good start... <a href="https://www.onio.com/article-list.html" rel="nofollow">https://www.onio.com/article-list.html</a>