I have been searching for a few books on batteries when I stumbled upon this book by Brendt. It contains very valuable information on how to characterize maintenance free batteries compared to other batteries. Starting from the fundamental chemistry of a basic electrochemical cell, the author then proceed to the various parameters and definitions, and also discusses at length the Lead-Acid and Nickel-Cadmium, and Nickel Metal Hydride Battery systems. The extensive discussion on internal oxygen cycle, the principle behind the above three operations is discussed in detail. It gives a very understandable introduction for the novice, without sacrificing the various technical terms used in describing this in detail. It then discusses the various operational requirements of the battery systems in a point by point manner. This book is really recommended for those who are embarking on serious research on batteries and even an excellent introduction for those who are confused on the various technical specifications for batteries.