Covering different types of metal-air batteries and their components as well as system designation, this book systematically summarizes current progress and research advances in the field that was previously unavailable in the literature. Following the fundamentals of electrochemical batteries, the text then goes on to introduce the various types of metal-air batteries and such topics as cathode construction, electrocatalysts, anode protection, and oxygen electrochemistry, as well as the system-level considerations for their use. The focus throughout is on those battery systems that show great potential for renewable energy storage and the book concludes with a summary of future perspectives in the field. Of great interest to industrial as well as academic researchers.