One of the links from the article actually provides a photo of a tear-down [1]. Apparently if you remove the label in the battery slot there is a hidden logo fr

One of the links from the article actually provides a photo of a tear-down [1]. Apparently if you remove the label in the battery slot there is a hidden logo from Xiaomi. [1] https://www.facua.org/es/images/noticia10806h_2.jpg https://www.facua.org/es/images/noticia10806h_2.jpg