Maybe it would be nice to have a possibility to read the batt level of the Nextion enhanced displays.
And maybe also a power level indication, would be a nice to have feature.
I am now reviewing all of the Feature Requests, this will take some time, patience please.
Request carried forward
Generally the power in the batteries that power the RTC (CR2012 or the likes) last for years.
It is generally not a smart idea to drain it by polling for a power level - then it lasts days.
This has been the way with RTC batteries for decades with a history dating back to early PCs.