First of all reset Ur phone
and uninstall all Unused samsung apps and disable bixby......
go to powermode and select medium power saving mode
and de select the limit cpu speed to 70% and set screen resolution as hd+
select put apps to sleep when imediately it's not in use
this will improve ur battery performance and keep charging between 20 to 90%
it will give battery improvement
Try and give ur valuable comments.......🙃🙃🙃
