A portable electronic device has a battery cover and a housing releasably mounted with a battery cover latching assembly. The decorative body is made of transparent resin and its interior forms a plurality of refractive spaces that may be irregular cracks or gas bubbles, and the illuminant base is provided with at least one LED. Battery cells and methods of making battery cell tabs are also described. The donor substrate is detached at the embrittlement zone to transfer the thin layer to the support substrate while minimizing blister formation in and surface roughness of the transferred layer. The electronic device includes a communication processor configured to collect an event associated with operation of an application while an application processor is in a sleep state, and a communication interface configured to transmit a message corresponding to the collected event to an external electronic device. In addition to identifying and outputting representations of language objects that are stored in the memory and that correspond with a text input, the device is able to employ contextual data in certain circumstances to prioritize output.