The allegedly-wireless allegedly-RCA “Airnegy” alleged charger →
https://marco.org/2010/01/14/the-allegedly-wireless-allegedly-rca-airnegy-alleged
Dan Rutter (of Dan’s Data) makes a strong case that the highly publicized RCA “take power from the air!” charger is probably bullshit.
It makes sense. Even if the idea is to trickle-charge its internal battery over long timespans to provide occasional bursts of power, I’m not even sure if it could pick up enough energy to do that at any useful rate.