The population is expected to increase in the future; therefore it is certain that the demand for electric power will also increase. There has been an increase of inventions such as mobile phones, lights, refrigerators, and so on, so that the excessive use may increase the need for electrical energy. With the energy crisis that has engulfed the world, our idea is an innovation to save electric energy, by experimenting with using POWERBANK. Powering a phone with POWERBANK will allow us to replace the battery with energy from salt water.
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