8881 Power Functions 9V Battery Box for Trains/Motors/Lights/MOCs For LEGO Toy | eBay
Power Functions Battery Box & Mindsensors' NXTServo
LEGO Medium Stone Gray Power Functions Battery Box with Beam Connectors with Black and Yellow Arrows Sticker | Brick Owl - LEGO Marketplace
Amazon.com: PHYNEDI 5Pcs Black Upgraded Motor Power Modification Accessories Building Set Compatible with Lego Technic, 1x M-Motor, 2X L-Motors, 1x Battery Box, 1x Remote Control : Toys & Games
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MOC Building Block Technical Parts 1pcs Power Functions BATTERY BOX AA 4X11X7 compatible with Lego 16511 For Kids Boys Toy - AliExpress
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LEGO part 87513c01 - Light Bluish Gray Electric 9V Battery Box Power Functions (Non-Rechargeable) with Dark Bluish Gray Bottom at BrickScout