>
http://en.wikipedia.org/wiki/Energy_Catalyzer
> The Energy Catalyzer (also called E-Cat) is a purported cold fusion
> or Low-Energy Nuclear Reaction (LENR) heat source[1][2] built by
> inventor Andrea Rossi[3][4] with support from physicist Sergio
> Focardi.
> In May 2013 a non-peer-reviewed paper describing "results obtained
> from evaluations of the operation of the E-Cat HT in two test runs"
> was submitted to the arxiv digital archive.[61] Although the authors
> of the paper wrote that they were not in control of all of the
> aspects of the process, they concluded that, even by the most
> conservative of measurements, the device produced excess heat with a
> resulting energy density that was at least one order of magnitude—and
> possibly several—higher than any other conventional energy source,
> including gasoline.[62][63][64]
>
> Astrophysicist Ethan Siegel commented at scienceblogs saying Rossi
> did not allow the reactants or products to be measured on this
> occasion. despite that in the previous tests there was not enough
> Nickel-62 and Nickel-64 (the only two isotopes which can fuse with
> hydrogen), at 3.6% and 0.9% respectively, in the reactants to explain
> the 10% copper output and the 10% copper had the ratio found in
> nature, not after fusion. According to Siegel, Rossi also refused to
> unplug the machine while it was operating despite it being an easy
> way to surreptitiously power the device. He also added that the
> supposedly independent testers had to rely on data supplied by
> Rossi.