Abstract: A supplementary element sized and shaped to fit between a back side of a handheld device and a handheld device cover. The supplementary element comprises a board having at least one electronic component which are permanently assembled, the board is sized and shaped to fit between a back side of a handheld device and a handheld device cover while the handheld device cover is tightly coupled to a lateral side of the handheld device, the lateral side having an opening of a lateral female connector, a connector element having a male connector that is electronically connected to the at least one electronic component and configured to be connected to the lateral female connector, and a lateral mount mechanically connected to the board and fixates a tip of the male connector to face the lateral female connector when the board is placed over and in parallel to the back side.

Abstract: A supplementary element sized and shaped to fit between a back side of a handheld device and a handheld device cover. The supplementary element comprises a board having at least one electronic component which are permanently assembled, the board is sized and shaped to fit between a back side of a handheld device and a handheld device cover while the handheld device cover is tightly coupled to a lateral side of the handheld device, the lateral side having an opening of a lateral female connector, a connector element having a male connector that is electronically connected to the at least one electronic component and configured to be connected to the lateral female connector, and a lateral mount mechanically connected to the board and fixates a tip of the male connector to face the lateral female connector when the board is placed over and in parallel to the back side.