At present, some marine signal lights, navigation lights and marine radio equipment have used biological batteries produced by bacteria, seawater and other organic substances. Model ships powered by biological batteries have also sailed in the sea. Some people imagine to regard the whole ocean as a huge biological battery and build a power industry base on the ocean.
Others imagine using biological batteries as energy sources on spacecraft. As we all know, astronauts live in a closed environment when manned spacecraft sail in space. If a closed circulation system of substance transformation is designed and established in the spacecraft, carbon dioxide, urine and feces discharged by space flight metabolism can be converted into usable oxygen, water and food. In order to realize the material circulation in the spacecraft, biological batteries are essential. After experiments, American scientists have used biological batteries in the Gemini and Apollo spacecraft launched. Bio-battery releases electric energy, which is used for communication and control of the spacecraft, and realizes the material circulation in the spacecraft. The spaceship has nothing to throw, so it can go into battle lightly and fly to the mysterious depths of space.