The ornamental design for a chargingdevice, as shown and described.
FIG. 1 is a front perspective view of a charging device showing my new design;
FIG. 2 is a rear perspective view thereof;
FIG. 3 is another rear perspective view thereof;
FIG. 4 is a front elevational view thereof;
FIG. 5 is a left elevational view thereof;
FIG. 6 is a right elevational view thereof;
FIG. 7 is a rear elevational view thereof;
FIG. 8 is a top view thereof; and,
FIG. 9 is a bottom view thereof.
The structural features depicted by broken lines have been shown for the purpose of illustrating portions of the charging device that form no part of the claimed design.