The ornamental design for a battery, as shown and described.
FIG. 1 is a front elevational view of a battery showing my new design;
FIG. 2 is a rear elevational view thereof;
FIG. 3 is a left side view thereof;
FIG. 4 is a right side view thereof;
FIG. 5 is a top plan view thereof;
FIG. 6 is a bottom plan view thereof;
FIG. 7 is a top, front and right side perspective view thereof;
FIG. 8 is a bottom, rear and right side perspective view thereof; and,
FIG. 9 is an enlarged view of portion 9 in FIG. 7.
The broken lines shown in the drawings are for the purpose of illustrating the boundary of the enlarged view portion of the battery that form no part of the claimed design.