LEGO part 87513c01 - Light Bluish Gray Electric 9V Battery Box Power Functions (Non-Rechargeable) with Dark Bluish Gray Bottom at BrickScout
LEGO White Electric 9V Battery Box 4 x 8 x 2.333 Cover with Fire Sticker | Brick Owl - LEGO Marketplace
LEGO Electric 9V Battery Box 4 x 8 x 2.333 Cover with "9V" (4760) | Brick Owl - LEGO Marketplace
LEGO Black Electric 9V Battery Box 4 x 14 x 4 Cover (2846) | Brick Owl - LEGO Marketplace
Sets that have 4760cx2: Electric 9V Battery Box Small Assembly with 9V Pattern
BrickLink - Part 4760c01pb07 : LEGO Electric 9V Battery Box Small with 'POLICE' Pattern on Both Sides (Stickers) - Set 6450 [Electric, Battery Box] - BrickLink Reference Catalog
LEGO Sets with Part 2847c01 Electric 9V Battery Box 4 x 14 x 4 Complete , with Dark Gray Base Assembly
BrickLink - Part 4760 : LEGO Electric 9V Battery Box Small [Electric, Battery Box] - BrickLink Reference Catalog