LEGO part 87513c01 - Light Bluish Gray Electric 9V Battery Box Power Functions (Non-Rechargeable) with Dark Bluish Gray Bottom at BrickScout
Building Block Aaa Battery Box Electrical Machinery Toy Motor Power Support Pf Model Sets Compatible With Lego Parts 88000 - Stacking Blocks - AliExpress
Amazon.com: JoyMeet Technik Power Functions Motor Set for Lego Technic 42115, Building Blocks Upgraded Motor Modification Kit Including Motors, LED, Battery Box and 2.4GHz Remote Control (7 Pieces) : Toys & Games
Battery Box | Blocks - New Box 8878-1 54599 8879 8884 8885 High-tech Moc Building - Aliexpress
LEGO® Power Functions Battery Box 8881 | Other | Buy online at the Official LEGO® Shop US
LEGO® Power Functions Rechargeable Battery Box 8878 | Other | Buy online at the Official LEGO® Shop US
Power Function Rechargeable Battery 8878 - General LEGO Discussion - Eurobricks Forums
LEGO has a mysterious new rechargeable battery, what can be the product? - RacingBrick