A battery that runs on scraps of food could fuel a battery providing electricity to top up your home’s supply, say UK researchers.



Although such “microbial fuel cells” (MFCs) have been developed in the past, they have always proved extremely inefficient and expensive. Now Chris Melhuish and technologists at the University of the West of England (UWE) in Bristol have come up with a simplified MFC that costs as little as £10 to make.



Right now, their fuel cell runs only on sugar cubes, since these produce almost no waste when broken down, but they aim to move on to carrot power.

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