Check the store shelves in about 20 years..
 

http://www.reuters.com/article/2014/...0I41EM20141015

There you go - scale it down by volume and you get a 2" cube providing 1kW for.. um.. a lot longer than 5 minutes anyways, the energy density is orders of magnitude apart. This technology might a be a little ways down the road for model use though.. :cool:

I hope they can make it work but I don't think this will be a viable RC power source even in 20 years.

Well, maybe 50 years, who knows. In any case I won't be around to enjoy it! But man carrying electric aircraft.. hmm..

You can buy man carrying electric aircraft today.

And there are some exciting developments in electric and solar for the near future
================================================== =====================
Front end
flight sustainer in full scale gliders – Looks very much like oneof our
e-gliders.https://www.youtube.com/watch?v=pTeNKM2cXQk
http://www.front-electric-sustainer.com/why.php
http://www.front-electric-sustainer.com/index.php


Electric Hang
Gliders and Ultra Lights
https://www.youtube.com/watch?v=eJGQzsB2V-g
https://www.youtube.com/watch?v=BGCiCcEY05o
https://www.youtube.com/watch?v=l85l-5dbodA
https://www.youtube.com/watch?v=JPEgxxNi6lo
https://www.youtube.com/watch?v=RuBAC_kz50I
Electric Ultra
Light Motor Glider – Part 103 class aircraft
https://www.youtube.com/watch?v=WGPBsLLAHU8
https://www.youtube.com/watch?v=JxHzxnaLhME
http://www.electraflyer.com/electraflyer-uls.php

Solar powered
electric launched glider – Proof of Concept aircraft
https://www.youtube.com/watch?v=o4nOkgtPjC4

Solar Impulse Cross Country Flight
https://www.youtube.com/watch?v=hI4VQux3qIo
https://www.youtube.com/watch?v=FWvgpngKIW4

Solar Impulse II – Round the world on sun power
https://www.youtube.com/watch?v=-gibrO3Dm1s
https://www.youtube.com/watch?v=azXbqnTqwFA