Battery drain issue in new iphone16

I been using my new iPhone 16 from past 5 days , I don’t know what’s wrong with the battery , it’s just been draining like water I hardly use my iphone but at a time I was using an iPhone 13 Pro Max which was far far better in terms of battery why is the new iPhone 16 not giving enough battery life 😢😢 I’m very angry and disappointed about Apple doing this and also not ready to fix the issue