Battery connection method and apparatus

A male electrical connector of an electrical device, comprising:

• a male housing comprising:
• a male extended portion at least partially forming a socket for receiving a plug portion of a female electrical connector;
• a first and second male internal wall extending into the male extended portion;
• electrically conductive first and second male power terminals respectively comprising first and second male contact surfaces comprising at least a portion of a face of the first and second male power terminals;
• wherein the first and second male power terminals are at least partially disposed within the socket and are configured to electrically couple with respective first and second female power terminals of the female electrical connector when the plug portion is inserted into the socket;
• wherein the socket comprises a keying member for inhibiting an unsupported electrical connection between the male electrical connector and another female electrical connector not comprising a compatible female keying feature;
• wherein the first and second male internal walls are adjacent to at least a portion of another face of the first and second male power terminals opposite to the first and second male contact surfaces;
• and
• wherein the first male internal wall is different than the second male internal wall in at least one of their respective dimensions of width or thickness.