At the recent 2010 International Consumer Electronics Show (CES), RCA introduced the Airnergy Charger which they claim is able to convert the energy in WiFi signals into electricity to power small devices. RCA demonstrated at CES that the Airnergy Charger was able to charge a BlackBerry from 30% to full charge in around 90 minutes using only ambient WiFi signals at the show for power.

The pocket sized Airnergy Charger has an internal battery for electricity storage. Power can be extracted from WiFi signals as the charger is carried around, or it can be left near a WiFi router at night to collect and store power for use the next day. Although this device would be a boon to the energy harvesting industry, some detractors suggest that the device would not generate a useful amount of power unless placed in the immediate vicinity of a high power broadcast.