RE: CES started today5 Jan 2022 21:32
"Make no mistake, this new technology is pretty much bordering on magic. For starters, the remote doesn’t even have a battery inside it and instead uses a super-capacitor or SuperCap. What the Eco Remote essentially does is harvest energy from radiofrequency (RF) waves floating about in the ether around it, either from your WiFi router or your phone, or any other gadget that broadcasts radio waves. The Eco Remote then converts these waves into DC energy that effectively powers the remote."
Seriously that looks like a game changer, imagine the possibilities, very interesting space.