Develop Bugs

Battery life based on kernels and ROM combinations

Been playing with many combinations of ROM and kernel yet seems no matter what I try battery life is poor. Right now running coreDroid 1.3.3 with latest Franco kernel seems so so with slight under voltage settings within setcpu. So what is everyone else opinions? Thanks for feedback!
Sent from my Galaxy Nexus using XDA App

My best combination has come from AOKP Milestone 3 and Faux's 12u kernel. Usually get 16-20 hours with light/mod usage during the day and heavy usage in the evenings.

theherodrownd said:
My best combination has come from AOKP Milestone 3 and Faux's 12u kernel. Usually get 16-20 hours with light/mod usage during the day and heavy usage in the evenings.
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Best battery life I've seen yet is the stock 4.0.4 release w/ the kernel that comes with it. I get 4-7 hours with mod-heavy usage and 14-16 hours of light-mod usage.

I get 2-3 hours using Franco's kernel. Really not great. I should look around for a better kernel to suit my usage.

Kalavere said:
I get 2-3 hours using Franco's kernel. Really not great. I should look around for a better kernel to suit my usage.
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Jeez you use your phone a lot. I'm on kang 1/31 with faux's kernel. I use my phone for the commute to work and turn off lte when I get there. Mostly music and reading. I have it underclocked at 1060mhz and running under performance governor, it helps me check my phone and send out texts at work faster. Then at night I flip on lte again and a lot of the times go out. I don't think 15 hrs is too bad.
Sent from my Galaxy Nexus using xda premium

best battery life i had was 36 hours with moderate usage. no lie.
aokp b17 + francos 13.1, smooth and amaziiiiiing battery life. if i wasn't a flash junkie, i would be sitting on that right now.

I'm a little confused by your post. Are you developing a kernel or a rom? Either way looking forward to the release.
Sent from my Galaxy Nexus

Gerson2407 said:
Jeez you use your phone a lot
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I mean screen on time!
I got 42 hours without charging the phone yesterday, with 2 hours 40 minutes screen on time. I was using it very sparingly over the period though.

If we you want this thread to be useful we need to make sure all posts at least state screen ON time. Even then there are so many other factors:
Screen On Time
Total Up Time
GSM/LTE
ROM
Kernel
Kernel Freq
Kernel Governor
Screen Brightness (Avg)
WIFI state
BT State
etc
Okay so I'll start...
Screen On Time - 3-4hrs
Total Up Time - 14 to 25hrs
GSM/LTE - GSM
ROM - AOKP 22
Kernel - Franco 16.2
Kernel Freq - 700/1000
Kernel Governor - Turtle
Screen Brightness (Avg) - <40%
WIFI state - On
BT State - Off

Clarify Battery Life Info
I am not developing anything. I am just wondering what people that flash different kernels and roms have experienced and settled on as far as best battery life. In my sig there is the one I currently use. I actually have been trying franco kernel lately and that seems to be slightly better. Its tough to tell since I try to plug in the phone as often as possible either to outlet or my laptop. Does that help clarify what I am curious about??

[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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Click to collapse
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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Click to collapse
+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.
Click to expand...
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.

Favorite kernel? Leankernel vs. franco.kernel vs. ?

What's your favorite kernel, considering battery life, speed, OC/UV options, and stability? I've been alternating between leankernel and franco.kernel and can't decide which I prefer. If you choose other, specify what your favorite is!

Trinity and lean are my favourites

Trinity... lean was also good for me...
Sent from my Galaxy Nexus using XDA Premium HD app

franco kernel

from battery saver to performance
-james bond
-lean
-franco
-trinity

mrdziuban said:
What's your favorite kernel, considering battery life, speed, OC/UV options, and stability? I've been alternating between leankernel and franco.kernel and can't decide which I prefer. If you choose other, specify what your favorite is!
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Click to collapse
I am using the kernel that come with CM9 beard off of Linux and I love it, I am getting better battery life using this than Franco's, but I'm not sure if you can just the kernel, I think you need to be on the ROM as well...
Sent from my Galaxy Nexus using XDA

i've tried lean,franco,glados and trinity..
both lean and trinity are my favorite, but for now i think i'll stick with lean

trinity for smoothness and super fast kernel
lean is for fast kernel + good batt

the latest trinity kernels...ofv and flatline are equal and in some cases better batt life then lean...without sacrificing performance...

I just recently purchased a Galaxy Nexus and have only tried out Franco Kernel. I get an average of 3.5 hours screen time while underclocked. After I record some accurate results, I think I'll switch to Lean Kernel in order to see which Kernel gives me the best battery life.

OrangeFever said:
I just recently purchased a Galaxy Nexus and have only tried out Franco Kernel. I get an average of 3.5 hours screen time while underclocked. After I record some accurate results, I think I'll switch to Lean Kernel in order to see which Kernel gives me the best battery life.
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Click to collapse
My thoughts exactly, although I've had my GNex for over 2 months.

Why not try both yourself for a while? Just flash them and see what suits you best... For me I started with Franco and just sticked to it as it works perfectly for my needs but I can't compare the both.

Tried Franco kernel, 17.2 give me the best battery life with slightly more than 3.5 hrs on screen time, for M1 and M2, can only last slightly less than 3 hrs on screen. Anyone also experience this?
Anyone here tried GlaDos kernel and have any reviews?

GLaDOS review
GLaDOS has both speed and good battery life. It's more or less based off the theory that processing stuff at higher speed will allow your phone to get more quickly back to sleep (not the same as "Deep Sleep"; the C4 rest state happens concurrently, even when you're on 1200 mhz).
But the only way to see if this pans out is to use it. You should try it with your daily usage and see if it works for you.*
For example, I find it has the best battery life for playing music with screen off (3% per hour speakerphone, 5-6% on bluetooth) and matches [or beats] the others for stress-usage (screen on, 8-10 apps in background gets around 20%). I haven't tried intermediate usage, because frankly, I don't use only a few apps when I'm using, so that's a gap to fill I guess. Note: streaming music is apparently a problem, judging from recent reports.
*Use BetterBatteryStats or an app with series history; the graph should become linear partway and that's when you know to take numbers.

Yeah but how do you backup your default kernel?

I just installed Franco kernel, why would one install lean kernel? what's the difference between two anyway?

I think the answer to this question is, 'it depends'.
I think the ROM/Kernel combination has an impact on performance and battery life.
For example: previously while running bixie's stock and AndroidME, I had great performance with Trinity. However, on AOKP, trinity delivered poor battery life. With AOKP, I found Franco to be a better match.

gbarayah said:
I think the answer to this question is, 'it depends'.
I think the ROM/Kernel combination has an impact on performance and battery life.
For example: previously while running bixie's stock and AndroidME, I had great performance with Trinity. However, on AOKP, trinity delivered poor battery life. With AOKP, I found Franco to be a better match.
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Click to collapse
OK, you're right I didn't really gave you enough information on my end)
I'm using stock Jelly Bean 4.1.1 OTA, I did rooted my phone so that I can install different kernel
I'm using few social (facebook,google+,foursquare,etc) apps, some messengers (what'sup,kik,google voice)
as far as data goes I'm using Juice Defender and that helps me a bit with my data on/off
but what _REALLY_ kills my battery is screen, in the best case scenario I was able to archive a little over 2h of screen time and in most cases it's ~1:30h
i'm using standard battery in my phone.
my goal is _SOMEHOW_ increase screen time
that's why I'm trying out franco kernel)

Stock.
Sent from my AOSP Android 4.1.1 Galaxy Nexus.

Tried trinity and faux and Franco with AOKP and I find Franco to be best with AOKP. I have it overclocked to 1.3GHz and no undervolt, since I have smart reflex on
Swyped on my Galaxy Nexus running AOKP with Franco Kernel

Give me your ICS secrets

Alright folks, I seek help.
Ever since the ICS source code was released for E4GT, every ROM that I have used have been plagued by the same issues.
Random reboots
Terrible battery life
4G problems
I am finally seeking advice on what the best ICS Rom is currently (not Touchwiz).
So tell me:
Exact current build of ROM you are using
Kernel
Modem
Settings that help with battery life
These ROMS are amazing, it's just that I get terrible battery life, and I constantly have that phantom menu button popup because of low signal.
Is everyone who are using ICS roms, are you having the same problems?
If so, then I am not complaining about anything, I just want a really good stable build right now.
I am using AOKP Milestone 6 currently, as I had the least problems with it.

DonutGrunt said:
Alright folks, I seek help.
Ever since the ICS source code was released for E4GT, every ROM that I have used have been plagued by the same issues.
Random reboots
Terrible battery life
4G problems
I am finally seeking advice on what the best ICS Rom is currently (not Touchwiz).
So tell me:
Exact current build of ROM you are using
Kernel
Modem
Settings that help with battery life
These ROMS are amazing, it's just that I get terrible battery life, and I constantly have that phantom menu button popup because of low signal.
Is everyone who are using ICS roms, are you having the same problems?
If so, then I am not complaining about anything, I just want a really good stable build right now.
I am using AOKP Milestone 6 currently, as I had the least problems with it.
Click to expand...
Click to collapse
i am using aokp too. i easily get 18-24+ battery life. heres all i do:
- i always leave wifi on at home.
- as soon as i leave home i turn off wifi
- i turn off accounts & sync
- i turn off backlight keys (settings ->device options ->sensors)
- i'm using smartassV2 govener
- i undervolted each -50
- i use power saver and set 'data action delay' to 30 seconds
- i disable widget updating w/ rom toolbox (tools ->auto start manager ->application)
- if i notice apps i dont normally use always running i disable or frezze them (for example maps)

I run CM9. I have no problems whatsoever.
Sent from my SPH-D710 using Tapatalk 2

ejbmvp said:
and let battery drain til phone shuts off w/o any charging.
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I've read that doing that actually damages the battery in the long run as that part of the method is for older type of batteries.
Sent from my SPH-D710 using xda premium

Your phone might be bad?
Sent from my SPH-D710 using xda premium

sai5o4 said:
I've read that doing that actually damages the battery in the long run as that part of the method is for older type of batteries.
Sent from my SPH-D710 using xda premium
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Click to collapse
The best way to keep your battery healthy is to unplug at 99% and charge before it drops below 10%. That will keep the cells healthy, actually charging to 100% and draining to 0% will shorten the life significantly. I used to do that drain and charge on my og evo and went thru 3 batteries in 18 months
We are legion, for we are many.
Sent from the DarkSide of the GalaXy with a MEK device

I'm running the Blu Kuban
Agats 4.0 kernel
SmartassV2 govern.. SIO io scheduler.. Under voted - 50.. No under clocking.. I get about 3-4 hours screen on time.. My phone hits 87% deep sleep (I never use Wifi.. Only 3g and 4g to I'd imagine my battery be better if I was on Wifi, but I don't have Wifi everywhere I go)
As far as charging.. I charge whenever.. If I'm somewhere and have my charher, I'll charge it.. Better to have several partial charges VS a lot of deep ones
- Sent From My Blu Kuban Themed Tapatalk Like A Boss

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
Click to expand...
Click to collapse
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
Click to expand...
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