Battery cunsumption in Android increase if Nextcloud Server not available.
Selv hosted Nextcloud Server available in local LAN/WLAN, Calendar sync only manual in DAVx5,
in Default Calender-APP Calendar Display and Update selected: Batteryusage=1%/h (is OK)
When WLAN in Device is off, or Accesspoint off, or Nextcloudserver off: Batteryusage=2.5%/h
cubot kingkong mini
Lineageos 17.1 without Googleapps with or without microG
DAVx5 excluded from Batteryoptimization or not.
Nextcloud Server hosted local and only accessible in local Network.
I have tried lots of setup combinations or calendar-app like etar
Increase of Batteryusage does not happen, if DAV Calendars completly disabled in Calendar-App.