IMHO, this group of settings {20%, 15%, 10%, 5%, off} should be extended with two others values {90%, 50%, 20%, 15%, 10%, 5%, off} where 50% indicates a strong propency to saving energy and 90% almost keep the phone locked in energy saving mode.
Moreover, the option:
- Enable battery saving mode until charger is connected the next time
should change in this more useful:
- Enable battery saving mode until next time got charged at 90%
The reason it is obvious, it is enough that I connect the smartphone just the time to trasfer some data from it with the MTP via USB and the energy saving mode will be reset to the normal but no a very little charge has been transfered to the battery.
Finally, the threshold in charging at {80%, 90%} will do the rest. In order to keep the smartphone always in energy saving mode. At the cost of few meaningful changes. Personally, I would add 70% at the values above, for those the battery is somehow compromised.
Is it possible to generate a patch for PatchManager to changes this behaviour? Which files are involved in changing reconfiguring the UI and/or its business logic? Because for the message to change, it is supposed to be translated in many languages in order to correctly address the various localisations.
POST SCRIPTUM
The mcetool command line should be installed with
devel-su pkcon install mce-tools