Power supply with cable retention

A power connection method for a power supply having an electrical power source, a power supply connector in electrical communication with the electrical power source, and a housing at least partially containing the electrical power source and supporting the power supply connector, the housing comprising an outer surface having an opening and a cable retainer coupled to the outer surface, the power supply connector recessed within the opening, the cable retainer comprising a wall extending away from the opening and outwardly from the outer surface of the housing and a pocket formed in the wall, the method comprising:

• connecting a cable connector of an electrical cable to the power supply connector, the cable connector comprising a radial projection integrally formed from a molding material overmolding the cable connector, the power supply connector and the cable connector being axially symmetrical;
• and
• axially rotating the cable connector while the cable connector is connected to the power supply connector between a first position, in which the cable connector can be disconnected from the power supply connector, and a second position, in which the cable connector engages with a cable retainer coupled to the power supply connector to prevent disconnection of the cable connector from the power supply connector,
• wherein the pocket is configured to face the molding material of the cable connector when the cable connector is connected to the power supply connector, and wherein the axially rotating includes rotating the cable connector until the radial projection of the cable connector is received and retained within the pocket of the cable retainer outside of the opening in the housing.