This is related to the material used in the wire, and the precursor of pure copper is the best. In addition, the mobile phone data cable is divided into fast charge, flash charge and ordinary charging cable. Specifically, you can also look at whether the end of the data line has marked the current size. The original fast charge line of the mobile phone, especially Huawei's, will mark the current, such as 5A. In addition to the line also depends on whether the power supply supports fast charging.