Battery Issues

[Toheedbutt1234]

So I just bought s9plus 2 days ago and I think I have a defected one. It is exynos version and the battery life I am getting is around 8 hours. I charged it 100% and the battery was 5% left after 8 hours of normal usage. Which includes only texting and taking a few pics( mobile data was on all the time) . I was using 1440p resolution. I am really worried right now because I bought it after working soo hard and I am getting a defected one after all that.... is it just me or the s9plus exynos version is having issues in general? I dont want to go to samsung service center and look like a complete ***** if they say that the battery is fine.

 

[Toheedbutt1234]

This is my details

 

[bIOforger]

um that antutu benchmark app had been running for almost 3hours, it will be that using alot of CPU.