The ornamental design for a wirelesscharger, as shown and described.
FIG. 1 is a perspective view of a wireless charger showing my new design;
FIG. 2 is another perspective view thereof;
FIG. 3 is a top plan view thereof;
FIG. 4 is a bottom plan view thereof;
FIG. 5 is a left side elevational view thereof;
FIG. 6 is a right side elevational view thereof;
FIG. 7 is a front elevational view thereof;
FIG. 8 is a rear elevational view thereof;
FIG. 9 is a perspective view of the wireless charger where a handle of the wireless charger is in an open state; and,
FIG. 10 is a perspective view of the wireless charger where the wireless charger is in a configuration of use.
The broken lines in FIG. 10 depict environment and form no part of the claimed design. The other broken lines in the drawings depict portions of the wireless charger that form no part of the claimed design.