There are 2 kinds of contact terminal: solder terminal (J pin terminal) and screw terminal. And many different button colors can choose.
Silver contacts, 15A high current, double pole single throw, "+" and "-" poles are controlled at the same time during operation, different colors of indicator lights can be selected, and special sockets for switches can be selected.
XT30U Lipo Power connector, its housing is made with PA and the contact is gold plated, its shape prevents reverse polarity, and when plugged in the connection is super-solid. Advantages: low resistance, slow heating, anti-reverse insertion