Power bank

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

FIG. 2 is a rear perspective view thereof;

FIG. 3 is a front view thereof;

FIG. 4 is a rear view thereof;

FIG. 5 is a left side view thereof;

FIG. 6 is a right side view thereof;

FIG. 7 is a top view thereof;

FIG. 8 is a bottom view thereof;

FIG. 9 is a front perspective view showing the power bank in an expanded state;

FIG. 10 is an enlarged detail view of area 10 in FIG. 1 ; and,

FIG. 11 is an enlarged detail view of area 11 in FIG. 2 .

The Dash-Dash broken lines in the drawings illustrate the portions of the power bank, which form no part of the claimed design. The Dash-Dot-Dash broken lines in the drawings depict the boundaries of the enlarged views and form no part of the claimed design.