Device: - Redmi Note 3 Pro
Rom: - Xiaomi.eu 6.8.4 | Beta
Kernel: - Radon V2.0
With the above, just got 6 hours of use with only 20% drop in battery.
I was streaming music over data (Bluetooth headset), using GPS for small bit of game play, downloading a movie and tv shows over wifi, and other game play over data connection.
Note also using the powersave option of "EX Kernel Manager", during this time. Performance mode while playing games.
No reboots doing the above which I had on earlier versions using ADM.
Will find out tonight, If I have still got the 15% battery drain overnight.