iPhone 15 Pro battery draining without use

I got my iPhone 15 Max 1 weeks ago and its running iOS 17.1. Before I sleep I left it with 72% battery charge, waking up after 9hrs my battery went to 5% without even using it. Even though I followed all the settings in the internet on how to keep my battery from draining too fast but the problem still the same. I even put it on low power mode all the time. I hope they will fix this as soon as possible.