This book is best used in conjunction with the youtube videos found at youtube.com/user/RobertMurraySmith where I will be happy to answer any questions you may have. The electrochemical supercapacitor is an emerging technology that promises to play an important role in meeting the demands of electronic devices and systems both now and in the future. This book traces the history of the development of the technology, and explores the principles and theory of operation as well as giving some guidance on the methods for producing the materials required to construct a supercapacitor . The use of supercapacitors in applications such as pulse power, backup sources, and others has many advantages over alternative technologies and until recently was well beyond the scope of the home experimenter. However, with the help of this book it is now possible for everyone to become involved in this exciting field of energy development.