Develop Bugs

[Q] what is the best battery saving kernel?

hey guys, i am looking for a kernel that will save me on battery. i am running zombie 4 rom. it says it runs the dark x kernel. i don't need to be running at super speeds but i don't want screen freezes either. i just want to be able to play my satellite radio without the phone draining 3 percent every 5 min or so. any help would be great.

edshawn911 said:
hey guys, i am looking for a kernel that will save me on battery. i am running zombie 4 rom. it says it runs the dark x kernel. i don't need to be running at super speeds but i don't want screen freezes either. i just want to be able to play my satellite radio without the phone draining 3 percent every 5 min or so. any help would be great.
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I would be interested in this as well. Currently I am Rooted and have tried a few ROM's but haven't found one yet that doesn't have some bug or another. {Granted, I haven't tried them all} Tried one ROM that really distorted my custom made Wallpapers, which is a big deal to me. So... yes, any info on a better battery life Kernel would be welcome.
Currently I am not a "heavy user" on the phone. Talk - Text - You Tube occasionally... that's it. Constantly looking for better ways to improve this already amazing phone.

Eugenes kernel has given me great battery life. Either get down with Eugene's Macnut ROM which already has it or search for it under the general section under the bounty thread for Eugene. Its in page....58?
Keep in mind that the "beta" kernel does not have bln support but works just fine so long as you use the lionheart governor.
If you can't find the bounty thread then I'm sorry for you.

Synergy kernel has been awesome on battery for many.
Sent from my SGH-T989 using XDA App

I second just using macnut rom. I've tried em all, and his always gets the best battery life (for me).
I also undervolt via system tuner pro so that I'm at 1137 at 1.51
Sent from my SGH-T989 using xda premium

G1ForFun said:
Synergy kernel has been awesome on battery for many.
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+1 for Synergy, i got well over a day when i was running rooted stock debloated, etc. Also i use setcpu ondemand gov. 1620 max 384 min

edshawn911 said:
hey guys, i am looking for a kernel that will save me on battery. i am running zombie 4 rom. it says it runs the dark x kernel. i don't need to be running at super speeds but i don't want screen freezes either. i just want to be able to play my satellite radio without the phone draining 3 percent every 5 min or so. any help would be great.
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Click to collapse
How you use your phone determines the best way to get the best battery life. Basically there are two ways to save battery: cutting power when not in use and delivering less power to the processors.
If you use your phone intermittently throughout the day for texts or calls, you'll get the best battery results from kernels/ROMs/apps that cut unnecessary functions when you're not using the phone. For example, juice defender cuts your wifi and mobile data when your screen is off and reactivates it every 15min (can be configured otherwise) to check for notifications. Darkside's Digital Warfare utilizes something called "deep sleep" which actually completely turns off your processors when the screen is off, but keeps the basic cell radio on so if you receive a text/phone call it will wake up the processor. These functions have the largest and safest impact on battery life.
If you're constantly using your phone and you want better battery life, you basically only have one option: undervolting. This is essentially supplying less power to your processors, which can be done through system tuner. It's not a free ticket, however; if you undervolt too low then at higher frequencies (playing games, etc.) your processor will become unstable and your phone will randomly reboot. If you encounter this, then don't undervolt that much and up the voltage to the last safe level. Just for reference, undervolting by 50mV is usually considered safe and undervolting past 100mV usually results in boot loops. But how far you can actually undervolt depends on your individual phone hardware, there's no universal answer. Make sure to not set your undervolt settings to set at boot until you find a stable voltage. Otherwise, you'll be forced to restore a nandroid if you encounter a bootloop.
TL;DR
If your phone already lasts a day and you want it to last 2-3 days, look into ROMs/kernels/apps that cut unnecessary functions when not in use. Most effective way to extend battery.
If your phone lasts 8 hours and you want it to last a day because you're a heavy user, look into undervolting with system tuner.

kernel darkside
my phone used in 24h, very good

I'm using juggs. 5.0 with a DSX kernel. I've been getting about 11-12 hours with decent use.
Sent from my SGH-T989 using XDA App

stock rom. Just download a battery manager from the Market.

AOKP with franco kernel

So I've been using aokp for months now and franco's kernel even longer. both amazing pieces of work. franco's kernel has been 99 percent stable for me, with an occasional sod with a few builds here and there (nothing a full wipe can't fix). However after my last sod, I kept getting forced reboots upon startup so I just flashed the newest version of aokp and it's been working fine as expected.
my question is, can you guys tell me exactly all the advantages of using franco's kernel with this rom as opposed to the stock? even after using it all this time (since early December) I guess I haven't noticed any significant differences. maybe I haven't paid enough attention because so far this stock kernel in aokp seems to be handling everything just fine. thanks in advance
Sent from my Galaxy Nexus using xda premium

Ok..., let's give it a try:
Franco's latest (nightly) kernel has (in contrary to stock AOKP kernel):
Sound Control (in latest builds from Ezeechiel (is that the correct way you write his name?))
GPU overclock
HotPlug for disabeling 1 CPU whith screen lock
USB Fast Charge enabeled
Wifi Power Management for better WiFi reception on screen lock
Color control.
I'm sure I forgot some settings.
Right now I get about 1% of battery usage in 2 hours when idle with data on (not Wifi), maybe 10 - 20 % with screen on (depending reception, what I do etc.) and I never have reached such figures with stock. I would for sure recommend Franco's kernel but a lot depends on your preferences. For me long lasting battery is important so I go easy on the clock speeds of the CPU.

thanks. that's the kind of information I was looking for. I don't feel the need to overclock but if there really is a good improvement in battery life, that's reason enough
Sent from my Galaxy Nexus using xda premium

Best ROM/Kernel combo for battery??/

I'm using the Verizon GNex running CM10 Kang with GLaDOS Kernel, and to put it simply, my battery life sucks. It drains 50% in about 2/3 hours.
How can I make it last longer???
Thanks!

arikaru0 said:
I'm using the Verizon GNex running CM10 Kang with GLaDOS Kernel, and to put it simply, my battery life sucks. It drains 50% in about 2/3 hours.
How can I make it last longer???
Thanks!
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Try MincoV3 , really good battery life http://forum.xda-developers.com/showthread.php?t=1790532&page=96

Bugs_Y said:
Try MincoV3 , really good battery life http://forum.xda-developers.com/showthread.php?t=1790532&page=96
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And that's for Verizon?

paranoidandroid with trinity 307 gpu has been amazing for me

AndroidME + Trinity

I get horrendous battery life on just about every rom and kernel I try that's just a gnex I guess, that being said air kernel has significantly increased my battery life on any rom I use it on. Settings I use are 1200 max 230 min smartass2 governor and sio scheduler
Sent from my Galaxy Nexus using Tapatalk 2

I don't think that there is much difference between Custom rom and Adroid versions, I noticed that JB seems to be more of a power drain hog than ICS.. But as usual it mainly depends on your personal usage and the main drain source is (then) always the screen.
Lowering the screen brightness will have more effects than kernels and custom roms

NerdFurgison said:
I get horrendous battery life on just about every rom and kernel I try that's just a gnex I guess, that being said air kernel has significantly increased my battery life on any rom I use it on. Settings I use are 1200 max 230 min smartass2 governor and sio scheduler
Sent from my Galaxy Nexus using Tapatalk 2
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Haha me too! I have to be doing something wrong.

should try out rasbean and trinity kernel. I got about 4h 40mins screen time

There isn't one... and nobody can tell YOU what kind of battery life YOU'RE going to get. Try something and make it work for you
Sent From My Toro+ via Tapatalk

well, i've been testing, and now i have nearly 24 hours of medium use with MIUIv4 with GLaDOS kernel

liquidsmooth v2 beta 1 with trinity
Although it still has a few bugs it's really fast and smooth and I get about 15-18 hours with 2-3 hours screen on and a few apps keeping phone awake
Sent from my Galaxy Nexus

[Q] How to enable hotplug in Franco Kernel M6 Stable (running CM10 Stable)

Hi everyone, noob here!
I tried navigating into
/sys/module/dsscomp/parameters
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, and hotplug_enable is not there, so echoing a 1 into it (obviously) doesn't work. How do I enable hotplug on my phone? As mentioned, running CM10 Stable with Franco Kernel M6 Stable (latest stable, basically).
Thanks in advance!
EDIT:
Flashed the nightly Franco Kernel build (r300), and hotplug_enable is still not there. Battery's been pretty crappy recently, no idea why (I get like at most 8 hours with 4 hours screen-on time, used to get 12-14 hours with 4 hours screen-on time), and it's bugging the hell out of me. Any insight is greatly appreciated!

starscream92 said:
Hi everyone, noob here!
I tried navigating into
, and hotplug_enable is not there, so echoing a 1 into it (obviously) doesn't work. How do I enable hotplug ogt he n my phone? As mentioned, running CM10 Stable with Franco Kernel M6 Stable (latest stable, basically).
Thanks in advance!
EDIT:
Flashed the nightly Franco Kernel build (r300), and hotplug_enable is still not there. Battery's been pretty crappy recently, no idea why (I get like at most 8 hours with 4 hours screen-on time, used to get 12-14 hours with 4 hours screen-on time), and it's bugging the hell out of me. Any insight is greatly appreciated!
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it has to be included in the kernel, its a governor. if its not there, you cant enable it. only other way is to compile franco kernel yourself, from franco kernel source, and then include it. it seems as youre getting the same battery life. 4 hours screen on time is 4 hours. difference is before you were letting it lay around between uses longer. if i use my device to the extreme, for hour straight screen on time, and thats all it lasts batterywise, its the same as using it lightly for 20 hours and getting 4 hours screen on time. its all about how you use it.

simms22 said:
it has to be included in the kernel, its a governor. if its not there, you cant enable it. only other way is to compile franco kernel yourself, from franco kernel source, and then include it. it seems as youre getting the same battery life. 4 hours screen on time is 4 hours. difference is before you were letting it lay around between uses longer. if i use my device to the extreme, for hour straight screen on time, and thats all it lasts batterywise, its the same as using it lightly for 20 hours and getting 4 hours screen on time. its all about how you use it.
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I see, thank you for your input. I will just try out the nightly r300 build for now and see if it improves anything.

Battery improvement kernel / ideas?

Just looking for a kernel or something to flash to get longer lasting battery than what I have right now.
ROM: Revolt JB
Kernel: intersectRaven
I only got 7+ hours till my phone died with average screen on and data on time.
Sent from my Nexus 4 using xda app-developers app

arthurgreeeen said:
Just looking for a kernel or something to flash to get longer lasting battery than what I have right now.
ROM: Revolt JB
Kernel: intersectRaven
I only got 7+ hours till my phone died with average screen on and data on time.
Sent from my Nexus 4 using xda app-developers app
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The usual recommendations are faux franco trinity and matrix. Try them out and see what works for you as every phone is different
Sent from my Nexus 4 using Tapatalk 2

Battery life is very important to me. My best combination has come with _motley kernel, now developed by @thracemerin as m+ (m+ thread, original thread). I slightly UV and UC using TricksterMod. For my ROM, I like some form of CM 10.1. The default CM 10.1 has great battery life, but I think the trailblazer11's linaro version is even better. I'm currently using Linaro Bean because it seems to get great battery life as well but is compiled with linaro and has a few added tweaks.
Personally, I love AOKP, but I've gotten miserable battery life with it on my N4, regardless of the kernel. Some of the combination/cherry pick ROMs are pretty good--personally I like Xylon and CodefireX, but Xylon has recently developed into a Frankenstein-like monstrosity, and CodefireX had some serious issues that weren't being fixed that were sufficient to send me back to CM.
Bottom line, though, like James says, is that it can vary a bit by phone, and a lot of it is personal preference.
Good luck!
arthurgreeeen said:
Just looking for a kernel or something to flash to get longer lasting battery than what I have right now.
ROM: Revolt JB
Kernel: intersectRaven
I only got 7+ hours till my phone died with average screen on and data on time.
Sent from my Nexus 4 using xda app-developers app
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Click to collapse

I get really good battery life with SentinelROM and the included kernel - it is based on CM 10.1. With moderate use I get 48 hours, and I've never had less then 24 hours with normal use, including calls and the occasional game of Wordfeud

The combo i use now works great for me :
ROM - Stock Jelly Bean 4.2.2 JQD39
Kernel - Faux Stock Kernel Enhanced
Why ?
Stock ROM Because : While AOKP , CM and all others have very intereting features....i've noticed that the stock ROM is the most butter smooth of all of them...besides i think the phone on stock is just perfect.
Faux Stock Enhanced Kernel - While i consider the stock ROM is perfect...i cant say the same about the kernel. Faux's enhanced version provides you with GPU OC , Screen Color Control , UV and most important for me : Throttling temp upped alot.
With this combo i manage to get about 14 hours of phone (4h Heavy Usage + 2h normal usage + 8 hours asleep) and a buttersmooth user experience.
But the best kernel for just battery is no doubt Franco Kernel, i managed to get 18 hours out of it (5h heavy usage + 3h normal usage + 10 hours asleep) but the smoothness does dissapear i do advice that.
Respect