Is this new normal?Only 4 hr 27 Minutes screen on time after ONEUI8 update .....that to without heavy usage ...Any suggestions?

What is this video effects ? Shown above? It is not going (this sign)

I bought my Galaxy S25 UItra in mid -July2025. At the end of August, I packed it awaywith about 70% charge to use another phonetemporarily. When I reopened it on October20, it was completely discharged andwouldn't power on. After charging to 18%, Itu...