heating issue s10+ after new update

Hi, try clearing partitions by going to recovery mode, switch off the device then press volume up button + power button + bixby button till you get the Samsung galaxy logo the the recovery mode will start, scroll down using the volume button to select Wipe Cache Partitions press the power button to select, then restart your phone.

After the update, the phone runs out faster, that's true. Many have it.✌✌✌

Check in battery usage for what drains your battery.

Sometimes it might be a software error, take your phone to the nearest Samsung service centre they will reinstall the software again for free, I've done that before.

You are most welcome.

off fast charging and check if it happens.
also check the charger

Hi brother, I think you are bothered about the battery estimations. Came to know that you have reset the device. I think your estimation will be ok after few days. The phone have to learn your usage patterns as well as the battery performance. It may take some days to provide better estimations.
Regarding to your battery draining I have a small suggestion. Please refer this post. Share with us your results. Thank you.
https://r2.community.samsung.com/t5/Galaxy-Note/Note-9-Battery-Issue-after-updating-June-Security-update/td-p/4777773