Mobile power supply is a portable charger that integrates power supply and charging functions, and can charge or standby power supply for digital devices such as mobile phones anytime and anywhere. Generally, lithium battery or dry battery is used as the storage unit. Different from the battery configured inside the product, it is also called external battery. Generally equipped with a variety of power adapters, it usually has the characteristics of large capacity, multi-purpose, small size, long life, safety and reliability, etc. It is a functional product that can supply power or standby charge for mobile phones, digital cameras, MP3, MP4, PDA, handheld computers, handheld game consoles and other digital products anytime and anywhere. So what kind of mobile power is good? The manufacturers of mobile power briefly analyze the characteristics and structure of mobile power. Mobile power supply manufacturers analyze the characteristics and structure of mobile power supply (Figure 1) From the internal structure of mobile power supply, it is mainly composed of lithium battery, protection circuit and PCB, and the advantages and disadvantages of a mobile power supply are also reflected by these two parts. From the use point of view of the two, the main use of batteries lies in storage capacity and power supply. It is difficult to distinguish the advantages and disadvantages of batteries from the surface, and no one can be sure that there must be huge quality differences between batteries of different brands unless a long battery aging test is taken. PCB circuit board bears greater responsibility, and the circuit board is responsible for the actual conversion efficiency, various protection mechanisms and output effect of mobile power supply. It can be said that the workmanship design of circuit board directly determines the output quality of mobile power supply. Therefore, if the PCB circuit board of a mobile power supply adopts good workmanship and design, and the batteries used at the same time are excellent, and it has a solid protection circuit, then the quality of this mobile power supply will be guaranteed.
