Extreme Battery Saving Kernel Profile got me almost 13 hours SoT!
Successfully underclocked and undervolt the GPU : r/SonyXperia
What Is Undervolting a GPU or CPU, and When Should You Do It?
8 Apps to Improve Your Android Phone's Performance - TurboFuture
By underclocking my CPU, I'm actually able to get around 2 more hours of SOT. Swipe to see the stats before underclocking. Compare the discharging speeds of both. P.s: It's a custom
How to Undervolt Your CPU: Boost Laptop Battery Life, Reduce Heat and Quiet Your Fans | Gear Primer