FIG. 1 is a front, top, and right perspective view of a battery charger;

FIG. 2 is a top plan view thereof;

FIG. 3 is a bottom plan view thereof;

FIG. 4 is a front elevation view thereof;

FIG. 5 is a rear elevation view thereof;

FIG. 6 is a left-side elevation view thereof, the right-side elevation view thereof being a mirror image of FIG. 6;

FIG. 7 is a front, top, and right perspective view of a battery for the battery charger of FIG. 1;

FIG. 8 is a top plan view thereof;

FIG. 9 is a bottom plan view thereof;

FIG. 10 is a front elevational view thereof;

FIG. 11 is a rear elevation view thereof; and,

FIG. 12 is a right-side elevation view thereof, the left-side elevation view thereof being a mirror image of FIG. 12.

The claimed design is embodied in the collective appearance of the charger and its battery.