Samsung
Show Battery Usage Stats auf Samsung
Battery usage on Samsung phones is tracked by the Battery and device care module, which logs power draw per app and per system feature in one-hour blocks.
To open this data, go to Settings ➔ Battery and device care ➔ Battery ➔ Statistics, then choose Since last full charge or Last 7 days.
The chart plots consumption per hour and marks the point where the device was plugged in and charged, so you can tell whether background activity or screen time caused a drop.
If the graph shows a single app spiking overnight, check that app's background permissions rather than changing general power settings.
This view only reports what already happened. It will not fix a drain issue caused by a rogue app or a stuck system process on its own.
For drain that repeats daily at the same time, combine this history with Adaptive battery or background usage limits for a fuller picture.