I claim the ornamental design for a batting trainer, as shown and described.
FIG. 1 is a perspective view of a batting trainer in an extended position, showing my new design;
FIG. 2 is a front elevational view of the invention in the extended position;
FIG. 3 is a rear elevational view of the invention in the extended position;
FIG. 4 is a left-side elevational view of the invention in the extended position, the right-side elevational view being a mirror image thereof;
FIG. 5 is a top plan view of the invention in the extended position;
FIG. 6 is a bottom plan view of the invention in the extended position; and,
FIG. 7 is a left-side elevational view of the invention, illustrated in a collapsed position.
The broken lines showing a baseball player, ball and coach in FIG. 1 are included for the purpose of illustrating the batting trainer in use, and forms no part of the claimed design.