WARNING: Use this settings at your own risk. I am not responsible for what will happen to your phone.
So, Siyah Kernel 4.1.4 has been released, and since 4.1.1 and its new features I have struggled for obtaining maximum battery life without loosing smoothness.
I tested these settings on 5 phones (Galaxy S2 GT-I9100): mine and my friends' ones, and we all got the same (more or less) results: it's awesome!
Screen usage can get up to 7 hours. I did these tests with mobile data on for all phone usage, and not in deep sleep. When I was at home I switched to Wi-fi.
My ROM is AOKP M6 (ICS 4.0.4), other tests were made on Resurrection remix JB, stock XWLPF (ics), CM9 stable (screen usage: about 6 hours, no more), and AOKP JB (latest).
Extweaks settings:
CPU: GENTLE FAIR SLEEPERS: ON CPU HOTPLUG: (default) CFS TWEAKS: Linux kernel defaults CPU IDLE MODE: AFTR+LPA SMOOTH SCALING LEVEL: 800 mHz MAX CPU LOCK: Dual core mode CPU UNDERVOLTING: - 50mV (if you get freezes, set -25mV) CPU STEP COUNT: 16 (all available) GOVERNOR: pegasusq MAX FREQ: 1200 MHz MIN FREQ: 200 MHz
AUDIO: HEADPHONE AMPLIFIER: 0 (set this value as you want and as you ears can stand it, it doesn't affect battery life unless you listen to music)
SCREEN: TOUCHMOVE SENSITIVITY: 3 pixel ALL OTHER SETTINGS: default values mDNIe negative toggle: off
BLN: BLN: off NOTIFICATION TIMEOUT: never timeout BLN EFFECT: set what you want, cause BLN is disabled LED TIMEOUT: use ROM defaults LED FADEOUT: on LEDS ON WITH TOUCH: off LED VOLTAGE LEVEL: 2700 mV (2750/2800 mV if led lights are dim)
MISC: ANDROID LOGGER: off DEFAULT I/O SCHEDULER: cfq/noop ALL OTHER SETTINGS: default values
I think they are not too aggressive values, but if you get freezes, I recommend you reset your extweaks settings via CWM recovery and then use less aggressive ones.
In the attached screenshots, battery stats analysis starts from 91% since I had to restart my phone, and when it was at 10% I plugged the USB cable in to transfer a .zip file in my SD card, but I don't think that this 15-second charge affected my test (I'm sure it didn't!).
Phone usage was high today, I used Tapatalk, created a new UCCW skin, did some long phone calls, Facebook, messaging, e-mail checking, and other stuff I don't remember since the battery stats don't even report them (lol).
Notice that this is an extreme test. 7 hours of screen usage is not a myth, reality instead, but you cannot get them with the so called 'everyday usage'.
Screenshots of test made on my usual phone usage will come soon
THANKS: gokhanmoral : the men who created THE kernel, the Siyah kernel. geko95gek : author of MagicConfig. He found out the perfect balance between GPU frequencies and voltages.
I have Siyah 4.1.5 and cm10 as ROM and everything is fine
If you have some doubts about using these settings, try with less aggressive values first. If you can't see improvements in battery life without lags or lack of smoothness, use more aggressive ones. When you understand something is wrong with your phone (frequent lags, sods, freezes), then it's time to go back to the previous settings
Hope it helps
EDIT: when I say "without lags or lack of smoothness" I'm not talking about games, but everyday usage.
With extweaks plus you can switch among three different profiles so that when you want to play games such as Asphalt, GTA and so on you can apply settings for getting the best performance while gaming
As droidstarxx told you, it depends on how you use it. He said samsung based, and I agree with him, but aokp based roms still can give you a good battery life experience
I saw u're using XXKH3 modem as it's also my favourite... can u please share with me XXKH3 RIL ? It was what I've been looking for & nobody could provide it w/ links or a drop box.. thanks..
Sent from my GT-I9100 using xda app-developers app