In the promotional materials written by many portable power banks manufacturers for themselves, specific parameters are often used by them to illustrate their own differences. Consumers will inevitably be unable to grasp them when they see too many. Computer Network is responding to this situation. Through the qualitative aspects of the power parameters of mobile power supplies, consumers have mastered certain standards and methods for the identification of mobile power supplies. The three power parameters are: capacity, conversion rate, and self-discharge rate.

     1. In terms of capacity, it can be divided into four levels: emergency, business, boutique, and professional. Among them, 2000mAh is the emergency grade, 2000-4000mAh is the business grade, and they can be used more than 300 times; the boutique and professional grades are relatively large-capacity power banks, the former has a capacity of 4000-6000mAh, and the latter has a capacity of 8000mAh or more. The high-capacity portable power banks requires a cycle life of more than 500 times.

    2. The conversion rate can be divided into four levels: general, intermediate, advanced, and super. The corresponding conversion rates are: below 60%, 60-80%, 80-90%, and above 90%. In circuit design, in addition to the general level of non-synchronous rectification technology, the other three levels are all synchronous rectification technology.

    3. From the aspect of self-release rate, it can be divided into general quality, good quality and excellent quality. Among them, the self-release rate of general quality is high, 1%/day or more; the self-release rate of good quality is 0.4-1%/day; the self-release rate of excellent quality is low, below 0.4%/day. The lower the self-discharge rate, in general, the stronger the power retention capacity of this portable power banks, which is mainly determined by the quality of the batteries used, and secondly, it is also related to the circuit design. Generally speaking, the self-discharge of a dedicated portable power banks.