The reason why piezoelectric ceramics can generate electricity is that each tiny grain of this ceramic has spontaneous polarization that can be permanently stored. Under the action of a strong external electric field, it will be aligned in the direction of the electric field, making the entire crystal polar. They can induce electrical phenomena externally due to changes in stress or temperature. The greater the applied stress, the higher the frequency of change, and the greater the power generation. High energy conversion efficiency can be obtained at the resonance frequency. Piezoelectricity with high voltage and a small current is required For the power supply, block piezoelectric ceramics can be used; for piezoelectric power supplies with low voltage and large current, thin-film piezoelectric ceramics can be used for integration. At present, the literature reports that there are various products for various types of charging power supplies. It is characterized by its small size and lightweight, which can be carried with it, especially in high mountainous areas or deserts without a power source. It can use a variety of mechanical power and stored power to generate electricity, which is not affected by magnetic fields or nuclear radiation. Aging. The following options are inconsistent with the passage:. ['When external stress or temperature changes, piezoelectric ceramics may produce electrical phenomena.', 'Different piezoelectric ceramics have different shapes and currents and voltages.', 'The piezoelectric ceramic power supply can use mechanical force to generate electricity without interference from the external electric field.', 'Piezoelectric ceramic power supplies have great application prospects in harsh environments.']