An electrochemical cell is a device that converts chemical energy into electrical energy. In scientific literature, it is also commonly referred to as a galvanic cell or a voltaic cell. It is essentially a system where chemical reactions occur and produce an electrical difference between two electrodes. Other synonyms for electrochemical cell include battery, accumulator, power cell, fuel cell, and electro-galvanic cell. Batteries are the most common electrochemical cells used in everyday devices, from smartphones to cars. Fuel cells are used in larger applications, such as powering electric vehicles or generating electricity for large buildings. Regardless of the name used, electrochemical cells play a significant role in modern technology and science research.