FIG. 1 is a perspective view of a charger for a wearable device showing the claimed design;
FIG. 2 is a front view thereof;
FIG. 3 is a rear view thereof;
FIG. 4 is a top view thereof;
FIG. 5 is a bottom view thereof;
FIG. 6 is a left side view thereof; and,
FIG. 7 is a right side view thereof.
The broken lines shown in the drawings depict portions of the charger for a wearable device that form no part of the claimed design. The oblique shade lines in the figures show a transparent, reflective, or shiny surface, and not surface ornamentation.