Abstract
This chapter outlines the batteries used in common portable electric and electronic devices. The number of portable devices has experienced dramatic growth in recent years. This growth would not have been possible without the introduction of new batteries with improved performance levels. The development of small batteries with high power energy has remarkably changed the use of secondary batteries in many devices. The applications in portable devices, some typical currents, and the use of primary and secondary batteries are given in a table. The chapter contains an illustration to show the energy output of cylindrical primary and secondary batteries as a function of current. When buying a portable device, the user finds in most cases a battery is included and in the manual its characteristics and instructions for proper use are provided. The chapter summarizes the criteria of choice of primary and secondary batteries for portable devices. Normally, the Original Equipment Manufacturer (OEM) makes a choice for a given device. The consumer can add considerations based on the operating conditions for his device.
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