@Moem
Yes, I thought so too, and it matches the description in the wiki. https://wiki.ubuntuusers.de/Ubuntu_Touch/UT_Tweak_Tool/

In my tests, however, the opposite was true. There might be another reason for this. I’ll repeat the test with different scenarios and log the power consumption in sleep mode.

-10 hours of standby (all apps with background suspension)
-10 hours of standby (all apps without background suspension)

In any case, battery consumption in standby mode (accessible only via phone calls and text messages + alarm clock function) can be reduced to a minimum. It feels like a Nokia 3210 with up to 260 hours of battery life, with the difference that modern smartphone features are available at all times.