@Peter-Gamma
Libertine is a container for Ubuntu desktop apps.
Support may vary depending on devices but it should work if not specified in the limitations.
Battery consumption is also very device specific.
The power management of Ubuntu Touch is pretty efficient, but how to control the CPUs is often hard to get for porters.
For example trying to put to sleep 7 cores from a 8-core device for a given period of time is not an easy thing when we don't have access to the proprietary blob handling it.