Да, я тоже вчера читал статью на Hackaday. Ты же пришел сюда после прочтения той статьи?
The research team was able to charge a Jawbone headset at a rate of 2.3mA for 2.5 hours which resulted in the battery going from 0-41%. The punchline here is the distance, the device being charged was only 5-7cm from the PoWiFi router which is getting close to inductive charging range.