Charging Smartphone by Breathing

What if you never had to plug in your phone to recharge it?  SmartPlanet describes the invention here:  Recharge your smartphone simply by breathing Students, I’m interested in your thoughts: What might be inside this device? How would it work?

Charging Smartphone by Breathing

What if you never had to plug in your phone to recharge it?  SmartPlanet describes the invention here:  Recharge your smartphone simply by breathing Students, I’m interested in your thoughts: What might be inside this device? How would it work?