Mobile power charging treasures are still relatively rare in the market. Power bank manufacturers generally use ordinary 18650 lithium batteries and advanced lithium polymer batteries. Advanced lithium polymer batteries have better safety than 18650 lithium batteries. It is recommended to choose a power bank with advanced lithium polymer batteries when the economy permits.

    Ordinary Lithium Cell Batteries 　The advantages of ordinary lithium cells are: because the development time is relatively long, the price of the battery is very low. Disadvantages: There are many used and refurbished batteries, and the problem rate and failure rate remain high due to process reasons. The large system, heavy weight, short service life and the possibility of explosion are very fatal shortcomings. The mainstream mobile power sources have gradually phased out such batteries. In the days to come, this ordinary lithium battery cell will gradually withdraw from the stage of history.

    Polymer batteries: According to the different electrolyte materials used in lithium ion batteries, lithium ion batteries can be divided into two categories: liquid lithium ion batteries and polymer lithium ion batteries. The positive and negative materials used in polymer lithium ion batteries are the same as liquid lithium ions. The positive electrode materials can be divided into lithium cobalt oxide, lithium manganate, ternary materials and lithium iron phosphate materials. The negative electrode is graphite.

     The working principle of the battery Also basically the same. The main difference between them lies in the difference in electrolytes. Liquid lithium-ion batteries use liquid electrolytes, while polymer lithium-ion batteries use solid polymer electrolytes instead. This polymer can be either "dry" or " "Colloid", most of them use polymer gel electrolyte.