Battery charger

FIG. 1 is a front, top and right side perspective view of a battery charger, showing my new design;

FIG. 2 is a front elevational view thereof; the opposite side being a mirror image thereof;

FIG. 3 is a top plan view thereof;

FIG. 4 is a left side elevational view thereof;

FIG. 5 is a right side elevational view thereof;

FIG. 6 is a bottom plan view thereof; and,

FIG. 7 is a reference view thereof showing the state of use.

The broken lines showing the battery in FIG. 7 are included for the purpose of illustrating environmental structure only and form no part of the claimed design.