Lenovo – alarms and notifications
Source: Don’t kill my app
We’re still gathering more information on battery saving features on Lenovo phones.
Lenovo P2 has a very good battery life, but at a cost.
For an app to work in the background:
- enable the padlock icon at an app in the right top corner in the overview of running apps. It’s only then actually running as a foreground process. If you swipe it away, its background process will be killed mercilessly.
It does not matter if the battery/power optimization is on or off in Settings -> Apps -> Circadian -> Battery.