Researchers from MIT designed «rectenna» which converts Wi-Fi signals into electricity

[DmitrySpb79]

40 microwatts LED? Looks like an error. The typical LED consumption differs from 50 to 500mW, but it is not in microwatts range.

[Assimilator]

A couple suggestions: "brand new" not "bare new", "to be fair" instead of "honestly".

[itNews]

Thank you. I'll be grateful if you will PM me next time (this is like a rule here at Habr).