BrickLink - Part 87513c01 : LEGO Electric 9V Battery Box Power Functions (Non-Rechargeable) with Dark Bluish Gray Bottom [Electric, Battery Box] - BrickLink Reference Catalog
WORKING lego vintage 9V white FIRE BATTERY BOX set 4760 SOUNDS LIGHTS 4771 4774 | eBay
LEGO Compatible Power Functions 9V Battery Box
Build your LiPo rechargeable battery for Control+ and Powered Up hubs. - LEGO Technic, Mindstorms, Model Team and Scale Modeling - Eurobricks Forums
BrickLink - Part 4762 : LEGO Electric 9V Battery Box Small Switch [Electric, Battery Box] - BrickLink Reference Catalog
LEGO® Set: 5038 Battery box 9V electric system
LEGO® Power Functions Rechargeable Battery Box 8878 | Other | Buy online at the Official LEGO® Shop US
9V Battery Cable - Compact Power for LEGO Power Functions – Green Gecko Workshop
LEGO® Power Functions AAA Battery Box 88000 | Other | Buy online at the Official LEGO® Shop US