LEGO Functions Power Functions Battery Box 8881 (1 Piece)
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Moc Building Block Technical Parts 1pcs Power Functions Battery Box Aa 4x11x7 Compatible With Lego For Boys Toy (16511) - Model Building Kits - AliExpress
Power Functions 4pcs Battery Box Train Motor IR Receiver Controlled For Lego Set | eBay
LEGO Power Functions Battery Box with Beam Connectors with On Off Sticker (59510) | Brick Owl - LEGO Marketplace
Alternatives to the LiPo Battery Box | Brick Model Railroader