We claim the ornamental design for a portable electronic device with cover, as shown and described.
FIG. 1 is a front perspective view of a portable electronic device with cover showing our new design;
FIG. 2 is a front view thereof;
FIG. 3 is a rear view thereof;
FIG. 4 is a left-side view thereof;
FIG. 5 is a right-side view thereof;
FIG. 6 is a top view thereof;
FIG. 7 is a bottom view thereof;
FIG. 8 is a rear perspective view thereof;
FIG. 9 is an exploded front view thereof in which the side portion is shown separated from the portable electronic device with cover;
FIG. 10 is an enlarged view of the encircled portion shown in FIG. 3;
FIG. 11 is an enlarged view of the encircled portion shown in FIG. 4; and,
FIG. 12 is an enlarged view of the encircled portion shown in FIG. 6.
The short dash-dash broken line in the figures shows portions of portable electronic device with cover which form no part of the claimed design. The dot-dot-dash broken line encircling portions of the claimed design that are illustrated in enlargements form no part of the claimed design.