
Portable battery pack eradicates the need for conventional charging sources and permits end-users to charge portable devices anywhere. The portable battery pack is a hand-held device, which can be sealed and easily carried anywhere anytime. The portable battery pack is used to charge tablets, portable media players, smartphones, and others devices. Currently, portable media players and smartphones are considered rapidly growing portable entertainment products. In order to enhance battery backup, various technologies are used such as lithium-polymer, nickel-cadmium, and lithium-ion. Three things that are considered while designing portable battery pack are system safety, fuel-gauging accuracy, and battery charging.