Wireless energy

[RussSchultz]

I think there's a difference between doable and practical.

The inefficiency of 'beaming' power is staggering.

 

[Crusher]

Correct. Microwaves have been used to power a remote plane.

I wonder how many birds were cooked during that test flight...

 

[Mize]

I once had a very small project to investigate ambient RF energy scavenging for combat soldier electronics. It works in principle. The project also included piezoelectrics in boots to generate electricity from marching. I believe some of the concepts are in the 21st century soldier program.