You might already know this, but anyway: Make your battery live long by not (ideally: never) letting it run all dry (0 %) and also avoid (or rarely resort to) charging it to 100%. You can ensure the latter by activating this: Settings > Battery > Charging control
So ideally keep the charging level between 30 % and 70 %. Frequent charging to keep the level there is better than charging it to the max all the time.
I understand “Charging control” to mean that when it’s enabled, it will stop charging at the level you set – even when it’s still connected to the charger. So it would stop some time during the night when the set level is reached, and you can unplug it when it suits you in the morning.
All renewables are fine, it does not have to be solely solar powered.
I don’t know., good question though.
Not sure how wifi competes vs different mobile networks in terms of energy consumption on a per Gbit basis.
I was rather referring to the simple general fact that every data transfer consumes energy and less data transfer consumes less.
Unfortunately, I was premature to assume this was widely available. For me it is (on my FP3+ running /e/OS-dev-T, and at least since the upgrade to T with a previous update). See this for more discussion on this:
