Amazon.com: LEGO Power Functions AAA Battery Box 88000 : Toys & Games
LEGO PART 84599 Battery Box, Power Functions, with Dark Bluish Gray Bottom [ Rechargeable] | Rebrickable - Build with LEGO
Technical Moc Parts Power Functions Aaa Battery Box Case Compatible With Legoed 10257 10261 10247 8881 8883 Robot Car - Automation Modules - AliExpress
850mAh 8878 Rechargeable Battery Box Lego Power Functions Parts Building Blocks | eBay
Alternatives to the LiPo Battery Box | Brick Model Railroader