Portable Power Bank Charger

FIG. 1 is a top perspective view of a portable power bank charger of the claimed design. FIG. 2 is a front side view thereof. FIG. 3 is a back side view thereof. FIG. 4 is a left side view thereof. FIG. 5 is a right side view thereof. FIG. 6 is a bottom plan view thereof. FIG. 7 is a top plan view thereof; and, FIG. 8 is a bottom perspective view thereof. The broken lines in the figures show portions of the portable power bank charger that form no part of the claim.