My screen is consuming 50% of my phones battery. I have latest MIUI 18 (STABLE). Is this happening with me only or its something like software problem?
It is quite common and the percentage actually means nothing. Click on it and it will tell you real duration of your screen activity. In my experience on mi2s the screen can last at around 5h. And it doesn't matter if it's a day or three. In other words the biggest impact on the battery has the screen.