Variants of a mold are catalogued separately, so each one has its own sets and minifigs. Check these too if something you expect is missing here.

• upn0172 Battery Cover, 4.5V 6 x 11 x 3 1/3 Type III Sub-part of this part
• 468c02 Battery Box, 4.5V 7 x 11 x 3 Type 2 [Complete Assembly] Mold of this part