Why are there several forms of mobile phone charging port?

Mobile phone charging interfaces include Micro USB socket, Type-C socket, Lightning interface and Apple high-speed multifunctional I/O interface.

Mobile phone chargers can be roughly divided into travel chargers, seat chargers and maintenance chargers, and the first two types are mainly contacted by general users. The most popular in the market is the travel charger. There are also various forms of travel chargers, such as cheap duck egg miniature travel chargers, ordinary desktop card chargers and high-end desktop chargers with LCD screens. Mobile phone chargers can be roughly divided into travel chargers, seat chargers, USB chargers and maintenance chargers, and the latest is the mobile phone case charger.

General users are mainly exposed to the first two. Travel chargers are the most popular in the market. There are various forms of travel chargers, such as cheap duck egg miniature travel chargers, ordinary desktop card chargers and high-end desktop chargers with LCD screens. In view of the fact that most mobile phone users are non-professional users, chargers basically have self-stop function, and most travel chargers belong to fast chargers, and the charging time is about 1-3 hours. Many chargers in the market flaunt the use of microcomputer control, including some very low-priced duck egg miniature travel chargers. In fact, only by strictly analyzing the charging circuit can microcomputer control of a small number of chargers be truly realized.