I'll believe it when I see it.
"1mw" would at least convey you are consistently irreverent of the proper case, or using an impractical onscreen keyboard, or in a rush to type this post. (We would understand.)
"1mW" on the other hand makes you look uneducated. Inconsistently inconsistent. You care about the case sometimes, but not always. You have no excuse to write it this way.
The real question is how much power was put into it, for how long, to get 470kwh out of it, for how long.
A half day test seems optimistic at best!
But damn it'd be good if this is real.
But I have no idea what a rack of cold-fusion devices would actually look like in reality.
It will give rise to another war, I'm quite sure.
from what I understand, the customer is taking this complete unit with them, having purchased it, and were satisfied enough to say, (guessing here) "ok, we want to take it home and really drive it ourselves".