3 ms·

How about tesla coils?

• jacquesm 11y ago
  How about them? Do you mean: Can an electric field of sufficient strength be used to charge cellphones?
  • kwhitefoot 11y ago
    Nokia had a project to charge mobile phones from ambient radio waves. But they had real engineers and scientists and even though it actually worked they reported how badly it worked. That is, the charging rate was so low that only the simplest mobile could be charged with it. I think they used a modified Nokia 100 or something similar. See this 'article' on Gizmodo: http://gizmodo.com/5285565/nokia-developing-wireless-accessory-free-ambient-charging http://gizmodo.com/5285565/nokia-developing-wireless-accesso...
• brokentone 11y ago
  A technology invented a long time ago that still isn't powering things like the inventor imagined it?