@j-ed I see… well running synchronization when nothing has changed shouldn’t even need one mAh. Android’s default policy is quite opposite: everything that needs power should be only run when the phone is charging, so that these operations don’t drain battery:
The impact of performing updates while the device is charging over AC is negligible, so in most cases you can maximize your refresh rate whenever the device is connected to a wall charger. Conversely, if the device is discharging, reducing your update rate helps prolong the battery life.
So maybe there should be another option “Only sync when phone is charging”, like it is found in many other sync apps (for instance, the Nextcloud app).
But then there’s the question: should there be as many options as possible or as little as possible? Personally, I’d like to have as little settings as possible, but maybe a good balance would be the best…