Modern devices Thermodynamics: Batteries, Fuel Cells and Supercapacitors considersvarious aspects of Modern devices Thermodynamics including an extensive overviewBatteries, Fuel Cells and Supercapacitors and related issues. It includes types of batteries,electrochemical aspects of fuel cells, lithium battery structure, applications of batteriesin modern world, types of fuel cells. This provides the reader with insights into the developmentof its history, so as to understand the properties of supercapacitors, taxonomyand characteristics of supercapacitors, supercapacitors as alternative energy source andits applications.