The design and development of a stable and safe the portable power bank solution is not only reflected on the circuit board, but also needs to be matched with powerful electric "cores" to give full play to the continuous strong energy. Have you ever questioned whether the capacity of the portable power bank packaging or the shell has been marked, let me teach you a few tips to judge.

    1. Pay attention to the portable power bank logo capacity, which is usually on the power bank body and manual, such as 6000mAh or 10000MAH.

    2. Fully charge the power bank first, and let the power bank charge enough time to saturate the battery.

    3. Use a digital product that can be supported by a portable power bank to record the battery capacity of the product first. This can be checked on the website and the manual. It is also marked when the battery cover is opened.

    4. Use the portable power bank to charge your digital products repeatedly, and recharge the battery when it is used up. The battery capacity of a digital product is for example: 2000 mAh. A 10000mAh portable power bank can theoretically charge your digital product about 4 times (10000X0.8/2000) because energy conversion will consume, so 4 times charge can be regarded as a good product, the general conversion rate is 75% -85%, depending on the R&D strength of mobile power solution providers, after all, the cost of developing a good board with a high conversion rate will be a lot.

    5. If your mobile phone is completely charged twice or three times, you can calculate that 2000 times 3 equals 6000 milliamperes, which can conclude that there are two possibilities. 1. The actual battery capacity of this portable power bank will not exceed 8000 mA, manufacturers deliberately mark large capacity for profit. 2. In the case of sufficient batteries, manufacturers do not pay attention to the development of power boards and only use power boards with a conversion rate of 60%.

    6. Judgment criteria: generally more than 72% is acceptable, good brand products will be around 80%, you have to pay attention to less than 70%. Not only the power conversion rate is not high, maybe the components also use substandard products, and then cause safety accidents.