The ornamental design for a batterychargingdevice, as shown and described.
FIG. 1 is a top perspective view of the battery charging device.
FIG. 2 is a top view thereof.
FIG. 3 is a bottom view thereof.
FIG. 4 is a left-side view thereof.
FIG. 5 is a right-side view thereof.
FIG. 6 is a front view thereof.
FIG. 7 is a rear view thereof; and,
FIG. 8 is a top perspective view of the battery charging device indicating the intended manner in which the battery charging device is to be used.
The broken lines shown in the drawings are included for the purpose of illustrating environmental structure or portions of the battery charging device that form no part of the claimed design.