Ahah that’s true, because some pacemakers send datas to the receiver/hospital through 2.4ghz band, so it can have interferences. But mine was only an example because my father has one of those device into his body and sooner or later it will need a “battery swap”. Maybe not a pacemaker but to power a small temperature sensor, or something similar, it will be useful, send datas and get energy, quite nice and futuristic!