Power Bank

1. Power bank 1 . 1 :Front 1 . 2 :Back 1 . 3 : Left 1 . 4 : Right 1 . 5 : Top 1 . 6 : Bottom 1 . 7 : Perspective 1 . 8 : Perspective 1 . 9 : Perspective view showing environment 1 . 10 : Perspective view showing environment 1 . 11 : Perspective view showing environment Reproductions 1 . 9 through 1 . 11 are perspective views that illustrate subject matter in an environment and form no part of the claimed design. The broken lines shown in Reproductions 1 . 6 and 1 . 8 depict portions of the power bank that form no part of the claimed design. The broken lines shown in Reproductions 1 . 9 - 1 . 11 depict environmental structures that form no part of the claimed design.