We claim the ornamental design for a battery, as shown and described.
FIG. 1 is a first perspective view of a battery;
FIG. 2 is a second perspective view thereof;
FIG. 3 is a front view thereof;
FIG. 4 is a back view thereof;
FIG. 5 is a first side view thereof;
FIG. 6 is a second side view thereof;
FIG. 7 is a top view thereof; and,
FIG. 8 is a bottom view thereof.
The dot-dash broken lines illustrate the bounds of the claim and form no part of the claim. The dash-dash broken lines and unshaded portions within illustrate portions of the battery that form no part of the claim.