Ubuntu already have in-build notification for low battery (means when battery level is 20% or below the system will show notification) However, there is no feature to show notification when battery level is 80% or above. For maintaining a good battery health, experts are recommending to use the devices between 20% and 80%.
I haven't seen any in-build feature inside Ubuntu to do this and I could't able to find a gnome extension.
Is there any gnome extension available to achieve this?