My new IPhone 16 has a terrible battery, he loses 4% every 10 minutes

My new base model of iPhone 16 that I bought 3 days ago from an Apple Authorized Reseller has a terrible battery. I timed it with a stopwatch, and in 10 minutes he loses 4%. Without playing games, downloading, at 50% screen brightness, in energy saving mode. I have the latest version of iOS 18.1 and all applications. So far it has 3 charging cycles and battery life is 100%. Chat gpt told me that during the first days of use, the phone adapts to the user and the battery may be weaker. But this iPhone supposedly has 22 hours of video playback, and when watching YouTube even at the lowest possible brightness, the battery runs out like ****. I don't use this phone much, on average since the purchase I have had the screen on for 1 hour a day and yet I had to charge it twice. I emphasize that I have had this phone for 3 days.