Electric 9V Battery Box 4 x 11 x 7 PF with Orange Switch and Dark Bluish Gray Covers : Part 59510c01 | BrickLink
LEGO Einzelteil 59510c01 - Light Bluish Gray Electric 9V Battery Box 4 x 11 x 7 PF Complete Assembly with Orange Switch and Dark Bluish Gray Covers bei BrickScout
Moc Building Block | Technical Parts | Battery Box | Boys Toy | 16511 - Building Block 1pcs - Aliexpress
For Lego Technic Power Functions Battery Box 8881 6257768 Part | eBay