The ornamental design for a battery for a combustiontool, as shown and described.
FIG. 1 is a top perspective view of a battery for a combustion tool of the present invention;
FIG. 2 is a front view of the battery for a combustion tool of FIG. 1;
FIG. 3 is a right side view of the battery for a combustion tool of FIG. 1;
FIG. 4 is a left side view of the same;
FIG. 5 is a rear view of the battery for a combustion tool of FIG. 1;
FIG. 6 is top view of the same; and,
FIG. 7 is a bottom view of the battery for a combustion tool of FIG. 1.
The structure depicted in broken lines is provided for environmental purposes only and does not constitute part of the claimed design. The broken lines directly adjacent to shaded areas define the bounds of the claimed design and form no part of the claimed design.