We’ve all experienced the frustration of a flat phone battery or losing your phone charger, right?
New technology developed by South Korean engineers could allow you to recharge your mobile phone simply by talking. The technology uses the sound of your voice and nearby noises to covert sound waves into electricity capable of recharging battery powered devices from your phone to electric cars.
Scientists are also busy developing technology to recharge your iPod with your heart beat and exploring ways to weave power-packing fibres into our clothes.
Insight
Adding environmental or social benefits to everyday items increases the possibility of widespread activism.
