It takes a half hour to get months of charge back, so it’s not a functional problem. I think you wanted to have a wireless mouse with a port in the back so it feels like a wired mouse when you want it to. That would have been cool but I suspect a standard usb cable wouldn’t be rated for being continually contorted and wouldn’t be as pleasant as a wired mouse wire designed for that, so you’d need a special wire and it was just not going to work.