The ornamental design for a mountablepowerstrip, as shown and described.
FIG. 1 is a perspective front view of the mountable power strip in accordance with an embodiment of the present invention.
FIG. 2 is a perspective rear view of the mountable power strip of FIG. 1.
FIG. 3 is a top view of the mountable power strip of FIG. 1.
FIG. 4 is a front view of the mountable power strip of FIG. 1; and,
FIG. 5 is a rear view of the mountable power strip of FIG. 1.
The broken lines shown in the drawings are included for the purpose of illustrating environmental structure and form no part of the claimed design. Furthermore, any portions of the mountable power strip not shown form no part of the claimed design.