Power Bank

FIG. 1 is a top, front, right perspective view of a power bank showing our new design;

FIG. 2 is a left side view thereof;

FIG. 3 is a right side view thereof;

FIG. 4 is a front view thereof, a rear view being a mirror image of the front view;

FIG. 5 is a top view thereof; and,

FIG. 6 is a bottom view thereof.

The broken lines depicting portions of the power bank form no part of the claimed design.