Did you see the news about a fellow named 'Chan' reporting independent verification of a home-built E-cat unit?Note that he is filling his box with fuel (mineral oil) instead of water. Burning that would provide a considerable amount of chemical energy.
He also says, "Noting that excessive copper and iron surprise showed up in the Swedish analysis I stocked powders of both with varies properties." Rossi claimed (unconvincingly, I think) that those were the result of some unknown nuclear transmutation, so he shouldn't need them. Unless, of course, he wants to add them to his "fuel" and claim that they appeared by nuclear syntheses.
I noted the comment about mineral oil possibly producing heat at that temp. But for ‘days’ as claimed? I’d like to have firewood like that. We’ll see. Hopefully we can get more details on the volume/mass of mineral oil, duration and temperatures and any energy input.