A portable electronic device (10, 24, 30, 40, 50, 60, 70, 80, 90, 100, 110, 120, 130) is provided having a base unit (12) and a plurality of add-on components (14), each encased within a moldable/conformal material (22). Each component (14) comprises component circuitry and communication circuitry for communicating with at least one of the base unit (12) and one of the other components (14). The base unit (12) and the component circuitry of the plurality of add-on components (14) comprise the electronics for the portable electronic device. A moldable material (22) encases at least a portion of each of the plurality of components (14) and the base unit (12), wherein the moldable material (22) of all of the components (14) and base unit (12) may be joined to form the integrated portable electronic device.