Bluetooth mouse battery status

Hi list, I reported this issue on the UPower GitLab issue tracker but I don't hold much hope it'll get the required visibility. https://gitlab.freedesktop.org/upower/upower/issues/100 I just had my Satechi M1 mouse quit working unceremoniously ... due to a dead battery. All along, GNOME's power settings have told me that it was at 99%. As per `upower -d`, this device in fact has no battery: Device: /org/freedesktop/UPower/devices/unknown_dev_CF_A9_BC_C1_9F_FD native-path: /org/bluez/hci0/dev_CF_A9_BC_C1_9F_FD model: Satechi M1 Mouse serial: CF:A9:BC:C1:9F:FD power supply: no updated: Wed 31 Dec 1969 07:00:00 PM EST (1567004080 seconds ago) has history: yes has statistics: no unknown warning-level: none icon-name: 'battery-missing-symbolic' Is this a UPower problem? A device problem? A GNOME problem? Thanks! -CB