Traditional Lithium-ion batteries have their own disadvantages including, high cost, adverse impact on the environment and human health, and the flammability of the electrolyte. Now Australian scientists have developed a nonflammable electrolyte for potassium and potassium-ion batteries, which could replace the lithium-ion with more sufficient and much cheaper ions, such as the potassium ion. The organic phosphate used in the novel electrolyte makes the batteries safer and also allows for operation at reduced concentrations, which is crucial for large-scale applications. Scientists have proved that next-generation potassium-ion batteries can be made reliable by using novel inorganic, phosphate-based electrolyte.