Conceptual mobile phone for Nokia that could be powered by cola, by Chinese designer Daizi Zheng. A bio battery is used instead of the traditional battery to create a presumably pollution free environment.
Unfortunately the idea bounces back in your face once you calculate the energy required to produce a can of cola. But there is hope, as it won’t require ‘the real thing‘ to charge your phone. It will also charge on sugar water. Article found here, pics & more info here.