A car charger interface, adapted for connection with a car charger socket, is connected to an electronic device or portable charger unit and movable between an extended condition for use and a retracted condition for storage. The interface has a generally flat shape when not in use and can be unfolded to a shape adapted for complementary connection with the car charger socket for use. The interface comprises a first portion and a second portion movable relative to one another between folded and unfolded conditions. The second portion may comprise wings pivotally connected along the first portion for pivoting to an unfolded position projecting from the first portion to form a generally X-shaped adapter body. Alternately, the second portion may be positioned at the longitudinal end of the first portion and connected thereto via a pivot point at the central longitudinal axis thereof for pivotal movement.