A galvanic cell is a device that converts chemical energy into electrical energy through spontaneous redox reactions. It consists of two half-cells, each containing an electrode and an electrolyte. One half-cell undergoes oxidation, releasing electrons, while the other half-cell undergoes reduction, accepting those electrons. This flow of electrons generates an electric current. The electrodes in a galvanic cell are typically made of metals, such as zinc and copper. The overall reaction can be represented by a chemical equation, and the voltage produced depends on the specific materials used. Galvanic cells are commonly used in batteries to power various devices.