Pogo pins are cylindrical spring-loaded electrical contacts that are used for a variety of applications, including battery charging, board-to-board connections, and docking stations for electronic devices. They consist of a metal pin that is surrounded by a spring and are designed to provide a reliable and low-resistance electrical connection when pressed against a target surface. Spring-loaded contacts are often used in applications where blind mating is required (where one or both mating connectors are not visible during the mating process). The spring-loaded mechanism helps ensure a reliable and stable connection even if the connectors are not perfectly aligned, making them more tolerant of misaligned and non-coplanar mating conditions. In addition, the durability and robustness of spring-loaded contacts are demonstrated by their ability to withstand up to one hundred thousand mating cycles. This makes them ideal for applications that require frequent mating and un-mating of connectors, such as portable electronic devices, battery-powered devices, and testing equipment. Spring-loaded contacts can also have a sliding or pivoting mating action, known as a push-and-lock mechanism. In this design, the contacts are housed within a housing or a receptacle and are normally standing in a non-mating position. When a mating connector is inserted, the spring-loaded contacts slide into the housing and make electrical contact with the mating pins. The push-and-lock mechanism provides a secure and stable connection, preventing accidental disconnections and ensuring consistent electrical contact. This type of spring-loaded contact is commonly used in a variety of electronic applications, such as data and power connectors, test probes, and interconnect systems. The sliding mating action can provide a convenient and user-friendly solution, particularly in portable and handheld devices, where quick and easy connections are required. Overall, spring-loaded contacts offer a versatile and reliable solution for a wide range of configurations of electronic and electrical applications, making them an attractive option for engineers and designers.