The importance of primary batteries in today's world cannot be underestimated; so much of our daily lives revolves around the use of these devices from portable communication equipment, cameras and calculators to pagers and pacemakers. It has long been felt that a need exists for an exposition of the principles of battery reliability and their characteristics. This book, divided into three parts, fills that need. Part One is introductory, dealing with essential characteristics of primary batteries and the basic notions of reliability. Part Two offers both practical and theoretical discussions of the elementary principles of battery reliability, such as battery capacities and distribution functions and deterministic and stochastic models of reliability kinetics. Finally, Part Three explores the practical aspects of battery reliability.