In modern society, cell phone has become an indispensable tool in people's life, and the importance of cell phone charger as a key equipment to ensure the battery life of cell phone is self-evident. As people's use of cell phones continues to increase, the demand for charging speed, safety and convenience is also increasing. EXPSEMI makes use of its own product characteristics to optimize the performance of cell phone chargers and meet the diverse needs of cell phone users for charging in different scenarios.