A power supply module configured for removable insertion into a power supply bay of an electronic system. A telescopic power connector disposed within the power supply housing includes a plurality of internal fixed contacts in electrical communication with an electrical socket and a movable member carrying a plurality of elongate sliding contacts in sliding contact with the internal fixed contacts. The movable member is movable generally perpendicular to an insertion direction of the power supply housing. A mechanical actuator is configured for moving the movable member of the telescopic power connector into connection with an external power connector, such as on a motherboard, so that ends of the sliding contacts are moved into electrical connection with terminals on the external power connector while remaining in sliding contact with the internal fixed contacts.