Being Tricky
The short answer
Some One UI 9 battery drain is normal for the first 2–3 days while your Galaxy re-optimizes apps, re-scans photos and installs app updates.
At a glance
About 15 minutes · Medium · For Android
Key point 1 of 5
Samsung's battery features also learn your habits, and that learning starts over to some degree after a big update.
Key point 2 of 5
Before changing settings, find the cause.
Key point 3 of 5
Work through these in order and give each change a day before judging it.
Step 4 of 5
Open Settings, then tap Battery.
Step 5 of 5
Tap View details to see app usage, Screen on time and Screen off time.
Quick tip
Battery protection (Settings → Battery → Battery protection) won't fix drain, but it helps the battery last longer over the years.
Watch out
On One UI 9, holding Volume down and Side together locks the phone down (the next unlock needs your PIN or password) instead of opening the power…
You might ask
How long does battery drain last after a Samsung update? Usually two to three days while the phone re-optimizes apps and re-indexes files.
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Being Tricky