This is a comprehensive overview of energy storage concepts, methodologies and applications.Students will find chapters exploring the underlying energy storage fundamentals under various conditions, such as organic fuels, phase transitions and heat capacity, in addition to reversible chemical reactions. Important energy storage types such as mechanical, hydrogen and electromagnetic energy storage are discussed in a pedagogical language and structure accessible to students and researchers alike. Valuable coverage of various types of batteries are included, such as metal hydride / "nickel", lithium, lead-acid and primary batteries, in addition to a variety of current applications.