Charging Base

FIG. 1 is a top, front perspective view of a charging base showing our new design. FIG. 2 is a top, rear 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 plan view thereof. The broken lines show portions of the charging base and a charging cord that form no part of the claimed design.