Combination Power Bank and Base

FIG. 1 is a first perspective view of a first element of a combination power bank and base showing my new design; FIG. 2 is a second perspective view of the first element thereof; FIG. 3 is a combination view of the first element and a second element of the combination power bank and base thereof. FIG. 4 is a front view of the first element thereof; FIG. 5 is a back view of the first element thereof; FIG. 6 is a left side view of the first element thereof; FIG. 7 is a right side view of the first element thereof; FIG. 8 is a top view of the first element thereof; FIG. 9 is a bottom view of the first element thereof; FIG. 10 is a first perspective view of a second element of a combination power bank and base showing my new design; FIG. 11 is a second perspective view of the second element thereof; FIG. 12 is a front view of the second element thereof; FIG. 13 is a back view of the second element thereof; FIG. 14 is a left side view of the second element thereof; FIG. 15 is a right side view of the second element thereof; FIG. 16 is a top view of the second element thereof; and, FIG. 17 is a bottom view of the second element thereof. The broken lines shown in the drawings depict portions of the combination power bank and base that form no part of the claimed design.