This battery-free cellphone runs on light and radio waves
Who cares about an OLED and a notch when your phone can sip power from its surroundings, allowing you to make calls without ever having to charge your phone.
This wild cellphone is part of a Google Faculty Research program and received three U.S. National Science Foundation grants for total investment of about $2 million. For that money, the creator, Vamsi Talla, built a single-board cellphone that can make regular phone calls connect you to emergency services. The team is commercializing the product at Jeeva Wireless.
According to IEEE, this thing can even make Skype calls:
Because this technology doesn’t require much in the way of changing cell towers Talla believes most cellphones could easily add this feature in the future. This means you could make a call even on a dead phone. Talla is also planning to add an e-ink display which means you could feasibly do very basic smartphone functions on your battery-less phone. The current model could cost as little as $1 to produce, which makes it excellent for developing countries.