Sets that have x468: Electric 4.5V Battery Box 6 x 11 x 3 & 1/3
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
The new Powered Up battery box | Brickset: LEGO set guide and database
Build your LiPo rechargeable battery for Control+ and Powered Up hubs. - LEGO Technic, Mindstorms, Model Team and Scale Modeling - Eurobricks Forums