Lockable electrical connector assemblies that couple electrical connectors to prevent the electrical connectors from unintentionally disconnecting are disclosed. The electrical connector assembly has a first electrical connector, a second electrical connector, and a retention ring that has one end surrounding and able to rotate about the second electrical connector. The first electrical connector preferably has tabs that extend away from the first electrical connector. The retention ring has a second end shaped to receive and lock the tabs of the male electrical connector. To form a locked connection, a user rotates the retention ring that causes the retention ring to confine the tabs of the first electrical connector. The user continues to rotate the retention ring until retention ring is placed into a locked position.