Microwave transmission of power hits 70 or 80% efficiency http://large.stanford.edu/courses/2011/ph240/shu2/ http://large.stanford.edu/courses/2011/ph240/shu2/

Microwave transmission of power hits 70 or 80% efficiency http://large.stanford.edu/courses/2011/ph240/shu2/ http://large.stanford.edu/courses/2011/ph240/shu2/ What you're seeing with phones isn't microwave, but inductance, very different technology with very different benefits/drawbacks.