Researchers at UW-Madison have been working on an energy harvester that they say can deliver watts of power. And not just one or two watts, but up to 10 or 20. This is a huge amount of power to get from a “free” energy harvester; we’re talking thousands of times more powerful than the current generation of pizeoelectrics. An iPhone, for example, typically consumes under five watts. This means that 10 watts could power two iPhones, and 20 watts could power four of them! Four iPhones! Imagine the possibilities!