Not sure how accurate this is... reportedly from Paul G. Allen School at University of Washington... and if it is, it`s early days... but interesting to see how it develops...
Personally I think it would be quicker to make a dog-powered phone; my two seem to have boundless energy, especially when I want to sleep... (just don't make any rude comments about where to put the USB socket....)
https://lnkd.in/eraPqdj