With the rapid development of smart phones, charging treasure has also become a standard in life. How to choose a good power bank? Judging the quality of a charging treasure can be considered from the aspects of capacitance, cell type, charging speed, circuit safety and so on.
1、 Capacitance of power bank
The capacitance of the power bank refers to the maximum storage capacity of the power bank. Usually, the English abbreviation MAH of "MA / h" will be marked on the power bank. When purchasing a power bank, you need to match the capacity of the power bank according to the basic capacity of the battery equipped with the mobile phone. If you buy a small capacity power bank, you will not be able to charge the mobile phone. If you buy a large capacity power bank, its volume will increase and it is inconvenient to carry.
2、 Type of charge bank cell
The battery cell of the power bank is the battery in the power bank. There are mainly two types of battery cells in the market: the first is the battery pack cell composed of parallel batteries, and the second is the polymer cell. The main difference between the two kinds of cells is the difference in space utilization. The first kind of cells is made of batteries in parallel, which is easy to waste space. The second kind of polymer cells can be made like chocolate to improve the utilization of space.
3、 Charging speed of power bank
There are two charging speeds of the power bank. One is the speed of the input power bank and the other is the speed of the output power bank. At present, most charging treasure in the market have fast charging function, but here we focus on the mismatch between the fast charging protocol of the mobile phone and the output protocol of the charging treasure. If it does not match, the fast charging function cannot be realized.
4、 Circuit safety of charging treasure
The circuit safety of the power bank needs to be disassembled to know. When consumers buy the power bank, they mainly know whether the power bank has safety protection devices, and then choose a reliable big brand to buy.
The above are the main parameters that need to be paid attention to and understood when purchasing the power bank.