Swedish scientists have created batteries from wood, coconuts and lemons.

To create the device, the wood structure is filled with molecules based on citrus and coconut. They turn into a polymer that allows you to store and release energy. The researchers say the battery can be recharged by sunlight or any other heat source. It allows you to adjust the temperature around the mark of 24 ° C. “The idea is that coconut molecules can go from solid to liquid, which absorbs energy, or from liquid to solid, which releases energy,” the scientists explained.