The ornamental design for a portableelectronicdevice, as shown and described.
FIG. 1 is a front perspective view of a portable electronic device showing our new design;
FIG. 2 is a front elevation view thereof;
FIG. 3 is a rear elevation view thereof;
FIG. 4 is a left side elevation view thereof;
FIG. 5 is a right side elevation view thereof;
FIG. 6 is a top plan view thereof;
FIG. 7 is a bottom plan view thereof;
FIG. 8 is an enlarged view of the portion delineated in FIG. 1; and,
FIG. 9 is an enlarged view of the portion delineated in FIG. 2.
The dashed broken lines in the drawings represent portions of the portable electronic device that form no part of the claimed design. The dot-dash broken lines in FIGS. 1, 2, 8 and 9 delineate portions of the claimed design that are illustrated in enlargements, and form no part of the claimed design.