This post gives a brief overview of the SAE J1772 Charging Adapter, a component of EV charging that allows EV owners to connect their vehicles to chargers and supply their batteries with power to travel.

Charging adapters connect the electric vehicle to a charging station in order to feed the battery with a direct current (DC). The charging station supplies an alternating current, which the on-board AC-DC converter turns into a direct current so that the battery can benefit from it. SAE J1772 charging adapters work with almost all Level 1 (120 volt) and Level 2 (240 volt) stations, and have recently been integrated to fit some DC Fast Charging stations. There is no federal law requiring a standardized Level 1 and Level 2 charging adapter, but most manufacturers of EVs have incorporated the J1772 adapter into their charging ecosystem.

https://www.edn.com/how-the-j1772-charging-standard-for-plug-in-vehicles-works/

The connector has five pins for AC Line 1, AC Line 2, Proximity Pilot, Control Pilot, and a Ground Pin.

https://en.wikipedia.org/wiki/SAE_J1772#Vehicle_equipment

The connector is meant to withstand up to 10,000 connections and disconnections, which means a lifespan of 27 years assuming one connect-disconnect cycle per day, according to Electric Vehicles News.

https://www.electricvehiclesnews.com/Footer/Technology/SAE_J1772.html