The ornamental design for a poweradapter, as shown and described.
FIG. 1 is a front view of a power adapter showing the design;
FIG. 2 is a rear view thereof;
FIG. 3 is a top view thereof;
FIG. 4 is a bottom view thereof;
FIG. 5 is a left side view thereof;
FIG. 6 is a right side view thereof;
FIG. 7 is a first perspective view thereof;
FIG. 8 is a second perspective view thereof;
FIG. 9 is a first perspective view of a power adapter showing the design in an environment of use;
FIG. 10 is a second perspective view thereof;
FIG. 11 is a first perspective view of a power adapter showing the design in a second environment of use; and,
FIG. 12 is a second perspective view thereof.
The even-length broken lines illustrate features of the power adapter that form no part of the claimed design. The dot-dash lines are boundary lines, which define the bounds of the claimed design, and the claimed design extends to these boundaries. These dot-dash lines do not exist in reality in the article embodying the design. The drawings include break lines which represent a symbolic break in length of the power adapter. The appearance of any portion of the article between the break lines forms no part of the claimed design.