I checked this yesterday and found it not to be working.
On previous QT firmware settings were,…
Auto timezone: disabled, manually set to my timezone.
Auto time set: enabled.
Time was correctly set on boot.
Test: Disconnect from internet/router. Power down and remove power source for 1 hour. Apply power, boot up and check time.
Result: Time/Date OK. Suggests RTC battery properly connected.
Test on latest QT firmware and no change in RTC connection,…
Time related settings: Same as above.
Test: Same as above.
Result: Time was incorrect, not current.
Goenjoy are you saying time settings need to be set entirely to manual for RTC battery to work latest QT firmware? If so, I will check when I get back.