http://www.core77.com/blog/object_culture/eco-friendly_nokia_phone_by_daizi_zheng_15673.asp
“Chinese designer Daizi Zheng has created a conceptual mobile phone for Finnish brand Nokia that could be powered by sugary drinks. Zheng proposes that the phone could run on a battery that uses enzymes to generate electricity from carbohydrates.”
This is a client project for designing an eco friendly phone for Nokia. Zheng quotes “Throughout my research, I found that using a phone battery as a power source is very expensive, consumes valuable resources on manufacturing, presents a disposal problem and is harmful to the environment. The concept is using a bio battery to replace the traditional battery to create a pollution free environment.”