battery problem

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Dear try to wipe cache partition from the recovery mode

In general, battery performance optimization is applied by learning the battery usage pattern after initial use after purchasing the product or OS upgrade. During the period of learning the initial battery usage pattern, you may feel the battery drain quickly.

If the battery is consumed continuously for a long period of time, it may be another factor, so please check the following additionally.
When running multiple apps at the same time, running games or apps that require high resolution and high performance, and turning on auto-sync and Wi-Fi, Bluetooth, GPS, etc., the battery will drain quickly.
It’s recommended to optimize battery usage time by setting Adaptive battery or adding unused apps to sleep depending on your usage pattern. 
(Settings → Battery and device care → Battery → More battery settings → Turn Adaptive battery on

You can also check the battery status using the Samsung Members app. If you use the phone care function of Samsung Members, you can check the battery status by yourself on the following steps, Samsung Members > Get help > Interactive checks > Battery.
If the diagnosis result is bad, please visit the Samsung Service Center with the device for future assistance

https://www.samsung.com/sa_en/support/service-center/

We hope this has been of some assistance to you. If you do have any further queries, please do not hesitate to contact us.
Hope you and your family staying healthy and safe!