With this guide, I was capable of having my phone on for 3 days with 1h of screen-on time, and 7h of screen-on time with YouTube and WiFi turned on.
I WON'T PROMISSE YOU YOU'LL HAVE THE SAME BATTERY LIFE I DID, BUT I...
Battery Life preset:
CPU Governor: powersave
CPU Minimum Frequency: 300Mhz
CPU Maximum Frequency: 1094MHz
CPUs Boosted: 2
Maximum CPU Screen Off: 1
Boost Lock Duration: 1
Down Lock Duration: 1
In this thread I'll share with you what I use and what I did to have the best battery life I could with our phone.
I don't know if this will work with all the models, but with mine (GT-I9301I) it works like a charm :D
So, I'll go direct to the point:
I own a S3 Neo, using a Lollipop part made from S5 Mini (thread here). The port was great and still the only Touchwiz Lollipop port we have. But, besides all the great thing it gave us, it has a big problem to...
Stock Rom with Sev3n kernel. Battery life's pretty good! Try it yourself :)
And don't forget to use Greenify, Amplify and modify the kernel with the Best settings (you can found them on a thread that I started about the most battery friendly ker...