A film that acts like a sponge is the key to picking up subtle movements that could power your device.
UK University devises revolutionary fibre can harness movement and sunshine to provide sustainable energy.
Researchers at MIT have been working to develop methods for harnessing energy from natural, passive processes.
Corky is a wireless mouse that powers itself with piezoelectric elements.
A promising new piezoelectric material, 100 times more efficient than quartz is being developed at Princeton University.