Yeah the battery slightly worse after MIUI 9.2.1 and nougat update. Doesnt feel as smooth now also. Even I feel some delay when typing this.

However, i appreciate the new features such as split screen and screen record.

There are even newer updates that claim to fix standby battery drain issues. Havent update yet. Worry that they add more features that potentially slow down the phone even more.

My battery gone from 2 lasting days to 1 lol on the latest update.