English researchers have built a battery that runs on table-scraps.
Inside the battery, which is the size of a personal CD player, a colony of E.coli bacteria produce enzymes which break down carbohydrates and release hydrogen.
Chemical reactions inside the cell strip electrons from the hydrogen atoms to produce a voltage that can power a circuit.
Scientists say 50 grammes of sugar would keep a 40-watt light bulb lit for eight hours.
(via /.)
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