A DC socket is an interface that connects a battery or power source to an electrical device via wires, enabling the transmission of direct current.
A DC connector consists of a DC plug and a DC socket. When the plug is inserted into the socket, direct current is transmitted to the electrical device through contact between the plug's contacts and the socket's spring contacts.

DC sockets are classified by pin diameter, primarily including specifications such as 0.5mm, 0.7mm, 1.0mm, 1.1mm, 1.3mm, 1.65mm, 2.0mm, 2.5mm, and 3.0mm.

DC sockets have a wide range of applications: Mobile devices such as smartphones, tablets, and power banks require DC sockets for charging; Transportation vehicles like new energy vehicles and electric bicycles rely on DC sockets for charging; Specialized fields including medical equipment and industrial control systems also utilize DC sockets for power connections.