Batteries? Just reprogram it with radio waves!
In all of the (well-deserved!) hullaballoo around Technical University Delft winning the 2017 Solar Race it’s easy to forget other cutting-edge technology developed at that fantastic university in The Netherlands, the country of the bold & thrifty. Back in 2016 for example, a research initiative between University of Washington and TU Delft jointly created a microprocessor that can power itself through stray radio waves and receive programmable updates in the same fashion. While the CPU in question is a snail by modern standards (it’s a RISC-ish 16-bit micro thriftily clocked at 0.016 GHz), at least it works with no battery required. Try that with your 32-bit machine running at 1 GHz! Radio-wave powering of has significant implications for Internet of Things development and for ambient computing as a whole.