LEGO Power Functions Battery Box with Beam Connectors (16511 / 58119) | Brick Owl - LEGO Marketplace
LEGO part 59510c01 - Light Bluish Gray Electric 9V Battery Box 4 x 11 x 7 PF Complete Assembly with Orange Switch and Dark Bluish Gray Covers at BrickScout
2.5 Inch 65276 Robot Fulai Wheel 50mmtt Motor Compatible With Lego Plastic Omni Wheel For Omni Wheel - AliExpress
LEGO Power Functions Battery Box with Beam Connectors (16511 / 58119) | Brick Owl - LEGO Marketplace