Comparison of lithium polymer batteries of mobile power supply with 18650

According to statistics, as of the end of 2020, 80% of smart device consumers are using mobile power. For mobile electronic devices such as smart phones and tablet computers, power consumption and battery life have always been an unsolved problem. As the "accompaniment" of these smart devices, mobile power supplies have almost become an indispensable part of life. The mobile power market has also Then it was flooded with all kinds of products. So, how to choose a power bank that suits you? The first thing to understand before purchasing is the core components of the mobile power supply: batteries, circuits, and shells. Among them, the battery cell and the circuit determine the endurance, charging efficiency and quality of the mobile power supply.

　　Battery core is the core component to realize the charging function, which is mainly divided into two categories: 18650 lithium battery and polymer lithium battery. The technology of 18650 batteries is more mature and more widely used. However, some unscrupulous copycat manufacturers have poor production technology for mobile power supplies, and power supplies assembled with disassembled electrical cores, B and C batteries have poor safety, which caused the 18650 batteries to catch fire and explode. However, the quality of the 18650 batteries used in the mobile power supply sold by most brand merchants is still guaranteed, and consumers can buy with confidence. Furthermore, the cost of 18650 batteries is much lower than that of polymer batteries, so they are often more affordable and accepted by more consumers.

　　 In addition to the battery cell, the circuit part is also an important factor affecting the charging efficiency. Although it sounds very abstract, the circuit is actually the usually mentioned PCBA protection board. The overcharge, overdischarge, overcurrent and other protection functions of the mobile power supply in the promotion are completed by the PCBA protection board. Another important indicator of mobile power-conversion rate is also inseparable from the quality of the PCBA protection board. Speaking of this, I have to mention a word with a high frequency now-nominal capacity. The actual output power of a mobile power supply is less than the nominal capacity, which is caused by the electric core and the resistance during the charging process. A good PCBA protection board can effectively reduce internal resistance and optimize IC circuit design, which can improve performance. Generally speaking, the conversion rate of mobile power sources on the market is generally around 75%, and the better ones are 80%-85%. Individual ones with excellent performance can reach 90%, but the conversion rate of inferior mobile power sources is even less than 30%! Therefore, when purchasing mobile power, consumers should not only look at the nominal capacity, but also care about the important indicator of conversion rate. Knowing the conversion rate, no matter how high the nominal capacity of the cottage mobile power is, it will not be tempted.

 In fact, it is difficult to be purely rational in purchasing. It is not enough to just look at the technical parameters, and different groups of people have different preferences for mobile power. Whether it's an 18650 lithium-ion cell or a polymer lithium-ion cell,For business people, it is more appropriate to bring a low-key and luxurious mobile power supply when traveling around the country to negotiate business. The tall polymer power supply is a good choice. Of course, the price of this kind of products is often higher, but the so-called "Brother buys not the power supply, and the brother buys the identity", this is the truth.

　　Students, young white-collar workers and other people are the mainstream of electronic product consumption. Every day playing games and refreshing the state consumes electricity. A large-capacity mobile power supply is indispensable, and it must also have a fashionable appearance and beautiful colors. A beautiful high-capacity mobile power bank with a capacity of over 10,000 mA can meet the needs of a day's charging. High cost performance is also one of the key factors considered by students. Large capacity and low price are the first choice.