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The introduction of Li-ion batteries in 1991 created a tremendous change in the handheld devices landscape. Since then, the energy stored and put to use in palm-sized electronic devices has quadrupled. Devices are continuously getting more power hungry, outpacing battery development. Written by leading engineers in the field, this cutting-edge resource helps professionals overcome this challenge, offering them an insightful overview and in-depth guide to the many varied areas of battery power management for portable devices. Engineers may find the latest details on optimizing charging circuits, developing battery gauges that provide the longest possible run-time while ensuring data protection, and utilizing safety circuits that provide multiple independent levels of protection for highly energetic batteries. This unique book features detailed design examples of whole systems, providing practitioners with the real-world perspective needed to put this knowledge into practice. Readers learn how to perfect their designs, helping to ensure the development of devices that will succeed in the fast-growing portable device marketplace. It is suitable for electrical and power engineers whose work involves the development of portable, industrial, medical, or military devices.