The book contains a course of lectures given to students of the specialty 0805 "Technology of electrochemical production," specializing in chemical current sources (HIT). General principles of CT design, processes occurring during their operation and storage, methods of research and measurement of electrical characteristics, separate electrodes and systems, basis of CT design are considered. Mathematical descriptions of discharge, self-discharge, charge are given. Formulas are given for calculating the energy, maximum power, heat dissipation and thermal power of some CHP. It can be useful for specialists working in the field of production, operation, research, development and design of CHP.