It is like for example, the citric acid in a lime or lemon can help to replace the small but highly polluting watch batteries, passing through the copper and zinc of the devices to generate enough energy to feed small screens for more than one week.
One of the most viewed are Digital clocks that operate with this type of energy, which is a good alternative to watches that need solar energy to operate, indoors it is not always available.
Furthermore, lemons that feed on these devices are biodegradable and including can use them to make compost for our Garden or Orchard.
