A portable electronic apparatus including: a plurality of electronic components; a unitary body having an exterior continuous surface, a first aperture in the exterior continuous surface and a second aperture in the exterior continuous surface, wherein a first portion of the exterior continuous surface and the first aperture define a first major face of the apparatus and a second portion of the exterior continuous surface and the second aperture define a second major face of the apparatus,and wherein the first aperture is sized and positioned for the insertion of at least some of the electronic components into an interior housing volume of the unitary body and is closed by an electronic component providing at least part of a user interface and wherein the second aperture is sized and positioned for closure by the insertion of an energy storage electronic component.