The administrators changed the title of this article for a reason. Moreover, that device is intended to be installed very close to the "consumer", that is useful in medical application, for example, where is no advisable to install the battery in a device to be implanted in the body. So you can install the emitter , transmitter, whatever you want call it on the skin. And WIFI is total bullshit. The say "WIFI frequency" aka 2.4 GHZ because as we all known is the deregulated frequency reserved for consumer application. So, IMHO the researcher shouldn't have used that term, is confusing ! From there to say that the experiment involve the problem of powering cordless devices in the sense of electronic gadget is complete misunderstanding of the sense of that research. Man , science is not an opinion.