The Nokia 'Green' Phone, designed by Chinese designer Daizi Zheng, is an eco-friendly phone. The concept is based on the idea of a pollution free environment by using bio-batteries. A bio-battery is friendly energy supply system which uses enzymes as a catalyst to generate electricity from carbohydrates (currently sugar).
In order to use the bio-battery as a power source for the phone all that is required is a small supply of a sugary drink. Once the battery dies only oxygen and water remains. Bio-batteries are fully biodegradable and have, on a single charge, a potential life-span three to four times longer than conventional lithium batteries.
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