FIG. 1 is a right, top, front perspective view of a case for battery cells embodying our new design;

FIG. 2 is a top plan view thereof;

FIG. 3 is a right side elevational view thereof, the left side elevational view being a mirror image of the right side elevational view shown;

FIG. 4 is a front elevational view thereof;

FIG. 5 is a rear elevational view thereof;

FIG. 6 is a right, top, front perspective view of a second embodiment, the top plan view being identical to that shown in FIG. 2 and the rear elevational view being identical to that shown in FIG. 5;

FIG. 7 is a right side elevational view thereof, the left side elevational view being a mirror image of the right side elevational view shown; and,

FIG. 8 is a front elevational view thereof.

The broken line representations of termination housings in FIGS. 1-4 and 6-8, of caps and vent holes in FIGS. 1, 2, and 6, of a lip in FIGS. 1, 2, 3, 5, 6, and 7, and of case edges in FIGS. 1-8 are for the purpose of illustration only, and form no part of the claimed design.