- Bulky mobile phone chargers could soon be a thing of the past with handsets running on soft drinks instead.
- Daizi Zheng designed the 'greenphone', which is powered by Coca-Cola, as part of her final university project.
- The Central Saint Martins graduate came up with the concept for Finnish mobile phone manufacturer Nokia.
- Ms Zheng said the prototype could run up to four times longer than a traditional lithium ion battery and has the potential to be fully biodegradable.
- The greenphone's bio battery generates electricity using enzymes to catalyse sugar in the drink.
- As the battery dies out, only water and oxygen are left behind.
- Unfortunately, Nokia will not be developing the greenphone prototype further in the near future.
- Ms Zheng told Sky News: "At the time they wanted something to bring out within the next two years and thought my design was too futuristic."
- But she added that bio batteries are being developed by large electronics companies and may be on the market in the next five years.
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