The ornamental design for a batteryclamp, as shown and described.
FIG. 1 is a top perspective view of a battery clamp;
FIG. 2 is a top plan view thereof of the battery clamp shown in FIG. 1;
FIG. 3 is a right elevational view thereof;
FIG. 4 is a left elevational view thereof;
FIG. 5 is a front elevational view thereof; and,
FIG. 6 is a rear elevational view thereof.
The ornamental design which is claimed is shown in solid lines in the drawings. The broken lines shown represent portions of the battery clamp that form no part of the claimed design. A bottom plan view is not shown because it is a mirror image to the top plan view shown in FIG. 2.