The ornamental design for a batterymaintainerfrontpanel, as shown and described.
FIG. 1 is a perspective view of the ornamental design for the battery maintainer front panel;
FIG. 2 is a front view of the battery maintainer front panel of FIG. 1;
FIG. 3 is a left side view of the battery maintainer front panel of FIG. 1;
FIG. 4 is a right side view of the battery maintainer front panel of FIG. 1;
FIG. 5 is a top view of the battery maintainer front panel of FIG. 1;
FIG. 6 is a bottom view of the battery maintainer front panel of FIG. 1; and,
FIG. 7 is a back view of the battery maintainer front panel of FIG. 1.
In these drawings, the solid lines illustrate the claimed ornamental design, whereas the broken lines illustrate environmental features that form no part of the claimed ornamental design.