At present, China implements a mandatory product certification management system for wholesale ac adapters. These products must be marked with the CCC mandatory certification mark before they can be sold.
Consumers should pay attention to the following points when wholesale ac adapter:
(1) The products that have been certified by CCC are preferred, and if possible, try to check the authenticity and validity of their certificates on relevant websites;
(2) Check the logo of the wholesale ac adapter. Qualified products must contain information such as rated input voltage or rated voltage range, power supply character symbol, safety instructions, etc. Do not wholesale ac adapter products with full foreign language logos;

(3) Select the ac adapter that matches the whole machine. Before wholesale ac adapter, you need to know the basic information such as the electrical parameters of the whole machine used with it. The output voltage must be consistent with the rated voltage of the whole machine;
(4) The plug and the interface should be tight and appropriate. If the interface is loose, the current received by the whole machine will be unstable, and it may also form a large instantaneous current.