The ornamental design for a battery, as shown and described.
FIG. 1 is a front, top, and left side perspective view of a first embodiment of a battery, showing our new design;
FIG. 2 is a front view thereof;
FIG. 3 is a rear view thereof;
FIG. 4 is a top plan view thereof;
FIG. 5 is a right side view thereof;
FIG. 6 is a left side view thereof;
FIG. 7 is a front, top, and left side perspective view of a second embodiment of a battery showing our new design;
FIG. 8 is a front view thereof;
FIG. 9 is a rear view thereof;
FIG. 10 is a top plan view thereof;
FIG. 11 is a right side view thereof; and,
FIG. 12 is a left side view thereof.
The broken lines illustrate portions of the battery that form no part of the claimed design. The dash-dotted lines denote the boundary of the claim and form no part of the claimed design.