FIG. 1 is a perspective view of a charging unit;
FIG. 2 is a top elevational view thereof;
FIG. 3 is a side elevational view thereof;
FIG. 4 is a front elevational view thereof;
FIG. 5 is a bottom elevational view thereof; and,
FIG. 6 is a back elevational view thereof.
The broken lines in the drawings are understood to be for illustrative purposes only and form no part of the claimed design.