One of the new features on the 8.1 update would've been the bluetooth battery charge.
Mine however, is not visible. Do I have to change something in settings?
Same here. Some bluetooth devices shows battery indicator in my Nokia, but some don't. I believe it has something to do with bluetooth version. My newer sport headset shows battery indicator (Jabra), but my older speaker (JBL) doesn't show. I don't know what bluetooth version those have.
Mine shows battery status only on one device so far and that is plantronics voyager legend headset. I have two different bluetooth speakers but sadly none of them seems to support this function.