LEGO Power Functions Rechargeable Battery Box 8878 - Walmart.com
Technic Power Function Building Blocks Motor Battery Box IR Remote Receiver Light Compatible Lego Kids Toys| | - AliExpress
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)
Amazon.com: DooQi CADA Technik Power Function Kit for Technical Cars, Including 3 Motors, LEDs, Battery Box and 2.4 Ghz Remote Control (Compatible with Many Models Such As Lego CADA) (S059-001) : Toys
Electric 9V Battery Box Power Functions (Non-Rechargeable) with Dark Bluish Gray Bottom : Part 87513c01 | BrickLink
Power Function Battery Box | Battery Blocks - Series Box High-tech Car Compatible - Aliexpress