TYPES of BATTERIES: A. PRIMARY BATTERIES: The primary battery is a convenient source of power for portable electric and electronic devices, lighting, photographic equipment, PDA’s, communication equipment, hearing aids, watches, toys, memory backup, and a wide variety of other applications, providing freedom from utility power. Major advantages of the primary battery are that it is convenient, simple, and easy to use, requires little, if any, maintenance, and can be sized and shaped to fit the application. Other general advantages are good shelf life, reasonable energy and power density, reliability, and acceptable cost. 1. ZINC-CARBON BATTERIES 2. MAGNESIUM AND ALUMINUMBATTERIES 3. ALKALINE-MANGANESE DIOXIDE BATTERIES 4. MERCURIC OXIDE BATTERIES 5. SILVER OXIDE BATTERIES 6. ZINC/AIR BATTERIES 7. LITHIUM BATTERIES 8. SOLID-ELECTROLYTE BATTERIES B. RESERVE BATTERIES : Batteries, which use hi...