As per your concern, we would request you to kindly perform the following steps to resolve your issue.
We recommend our customers use only Samsung-approved chargers, as 3rd party chargers with different output ratings may cause errors in the device.
If the device charging with a different charger: It seems there is an issue with your charger, kindly check the physical condition of your charger for any damage.
If damage: The issue might be because of the damage hence we request you to visit the Samsung service centre to get it replaced (Warranty not applicable).
If not damaged: We have tried all possible troubleshooting and the issue has not been resolved. I request you to visit the nearby service centre along with your mobile and charger for a detailed inspection.
Check charging. If the rating is 15W or above: Kindly try to charge the device in a non-inverter socket.
As a safety measure Fast charging may not support, you while you are using the device hence, request you to keep the device idle and check the charging performance.
Note: Kindly open Device Care from settings > Battery > Please tap on three dots (more options) at the top right-hand side > Please select settings > Enable fast cable charging.
For Android 11: Kindly open Device Care from settings > tap on Battery > tap on More battery settings > Fast charging > Turn on.
Kindly follow the standard charging procedure. i.e. please charge the device in switched-off condition for 10 minutes.
Turn off Wi-Fi, GPS, Bluetooth, etc. Turn off unused functions like Wi-Fi, GPS, Bluetooth, and location settings when not using them: On the home screen swipe down the notification panel > Turn off Wi-Fi, GPS, Bluetooth, and other connectivity features when not using them.
Kindly check if ''Multiple applications'' are running in the background of the device.
When running multiple applications, the processor processes more tasks and as a result, additional heat is released from the device. This happens with most electronic devices (even computers/laptops), including the devices of other manufacturers. Close all the background running apps when not using them.
Avoid usage of mobile phones during charging. Usage of the mobile phone when charging may cause slow charging issues. So we recommend you avoid the usage of the mobile phone while charging.
If the issue persists, kindly share the report of the problems with a log file. To share a log file, click on the Samsung Members Application (Open Samsung Members Application > Support> Tap on error report > Type your query > Send).
