Device low battery notifications are verbose and are missing icons
There are various issues with the device low battery notifications:
- Not using header capitalization
- The descriptions are on the long side
- There's no icon
Looking at the other notificatons of the same type, it seems that there's some inconsistent phrasing too.
It would be good to rewrite all these notifications, and to add icons for them (using the symbolic device icon should be enough).