This is how tap to pay cards work IIRC. Secure storage chip, transceiver chip, NFC coil, boom
Using NFC To Power Devices Instead Of Qi
Submitted 1 month ago by cm0002@lemy.lol to electronics@discuss.tchncs.de
https://hackaday.com/2026/05/05/using-nfc-to-power-devices-instead-of-qi/
hell yeah, I’ve made a whole useless product like that! In lab, we had OLED display powered by NFC too, and touchscreen e-ink tetris device, and spot welder lol. Nobody believed me it’s possible, even engineers who worked with me, might be I was the first one to come up with this hack.