The USB charging cable on the charging bank is used to connect the charging bank and other devices for power charging. Normally, USB charging cables can charge a variety of devices, such as smartphones, tablets, headphones, etc. The USB charging cable transmits the power signal and charges the device by connecting the charging bank and the device, so that the device's power can be quickly restored. Therefore, in travel or daily use, the USB charging cable is a very convenient and practical charging tool that can meet the charging needs of various devices.