The ornamental design for a top, front, rear and sides of a "battery charger", as shown and described.
FIG. 1 is a top, front, and left side perspective view of the top, front,
rear and sides of a battery charger showing our new design in which the
top, inner, left surface has the same appearance as the top inner right
surface;
FIG. 2 is a right side elevational view thereof; and,