The whole idea lies on having charge electronics embedded in your body via NFC or to make use of kinetic energy that is produced by your heart and lungs. Where the NFC charger is concerned, one would still require the presence of a battery pack under one’s skin, not to mention having to go through some surgery in order to mount energy-harvesters on your organs.
It has been two years since Rogers and his colleagues at the University of Illinois began work on a range of biodegradable electronics. With the development of a biodegradable power source, it translates to in vivo electronics delivering an extremely specialized, instantaneous treatment for your illnesses without causing any kind of untoward injury or harm to your body. The moment there is no more need for treatment, the implanted tech will then dissolve into nothing, without leaving any trace of it behind. Cool, eh?