Power Bank

FIG. 1 is a front and top perspective view of a power bank showing my new design;

FIG. 2 is a rear and bottom perspective view thereof;

FIG. 3 is a front elevational view thereof;

FIG. 4 is a rear elevational view thereof;

FIG. 5 is a left side elevational view thereof;

FIG. 6 is a right side elevational view thereof;

FIG. 7 is a top plan view thereof; and,

FIG. 8 is a bottom perspective view thereof.

The broken lines in the drawings depict portions of the power bank that form no part of the claimed design.