The ornamental design for a battery, as shown and described.
FIG. 1 is a right, front perspective view of a battery, showing, our new design;
FIG. 2 is a left, rear perspective view thereof;
FIG. 3 is a front view thereof;
FIG. 4 is a rear view thereof;
FIG. 5 is a top view thereof;
FIG. 6 is a bottom view thereof;
FIG. 7 is a right side view thereof; and,
FIG. 8 is a left side view thereof.
The broken lines present in the figures are included for the purpose of illustrating portions of the article which form no part of the claimed design. The dash-dot lines are included to indicate boundaries of the claimed design and form no part thereof.