What is the best kernel for battery life? - Galaxy S II Q&A, Help & Troubleshooting

I have used ninphos 2.04 and 2.05 and alot of chainfires kernels (kg2 kf2,kg3 and more)
I have noticed alot of diffrence regaring batterylife....between each one...I THINK chainfires gives best battery so far and ninphos 2.04 alot better battery than 2.05 (maybe its the BLN support that uses more battery even if BLN is not used)
So now I want a thread were you recomend the best kernels for batterylife!
So what is the your opinion?

Does a kernel really have something to do with battery life?

The kernel ought to be one of the major 'invisible' factors. It is always active, and has an impact of the timing of everything else that happens on the phone. Particularly if there are bugs which have a detrimental impact on battery, the kernel might expose or hide them. That's not to say that the best kernel will necessarily give best battery life.

I don't think it's BLN if not used.
I did some tests and when the lights are not flashy-flashy the phone enters deepsleep as supposed to and my battery life hasn't gone done noticabely, if you don't use BLN at all there isn't even the BLN service running in the back, so even less to worry about.
Ninphetamin is aimed at performance IIRC, so that could really make a difference, CF-Root is pretty much stock kernel + some initramfs mods, so should give same results as a stock kernel.

HellcatDroid said:
I don't think it's BLN if not used.
I did some tests and when the lights are not flashy-flashy the phone enters deepsleep as supposed to and my battery life hasn't gone done noticabely, if you don't use BLN at all there isn't even the BLN service running in the back, so even less to worry about.
Ninphetamin is aimed at performance IIRC, so that could really make a difference, CF-Root is pretty much stock kernel + some initramfs mods, so should give same results as a stock kernel.
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Maybe you are right, but I experience better battery in 2.04 than 2.05.
Anybody have tried speedmods kernel? Does it have good battery compared to CF-Roots kernel?

tshoulihane said:
The kernel ought to be one of the major 'invisible' factors. It is always active, and has an impact of the timing of everything else that happens on the phone. Particularly if there are bugs which have a detrimental impact on battery, the kernel might expose or hide them. That's not to say that the best kernel will necessarily give best battery life.
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Imo I think you are correct since the Kernel is the base for everything while Android is running.
Thus, you better flash to a stable/faster kernel in order to achieve better battery performance ?
I really don't have any experience with the Kernels out there, only flashed to Chainfire CF-root, though I would love to hear opinions about ppl that used few different kernels and tell their thoughts about it.

ShivaShidapu said:
Imo I think you are correct since the Kernel is the base for everything while Android is running.
Thus, you better flash to a stable/faster kernel in order to achieve better battery performance ?
I really don't have any experience with the Kernels out there, only flashed to Chainfire CF-root, though I would love to hear opinions about ppl that used few different kernels and tell their thoughts about it.
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I wrote a little bit in my OP, but I write again, ninpho is really good, very fast and pretty stable...CF-root I see is better battery and more stable but a little slower...
those two I have tried...anybody that have tried others are welcome especially speedmod kernel as I'm thinking about flashing it

tshoulihane said:
The kernel ought to be one of the major 'invisible' factors. It is always active, and has an impact of the timing of everything else that happens on the phone. Particularly if there are bugs which have a detrimental impact on battery, the kernel might expose or hide them. That's not to say that the best kernel will necessarily give best battery life.
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Thanks for your reply mister.
I have a question going on in my mind as this is about kernel, well I also was rooted with CF kernel but lately I flashed Ninphetamine 2.0.5 kernel, only to use BLN, and I have root too, now afaIk, I can't have two kernels at a time, so may I know how I have root still when I've flashed with Ninphetmanine kernel and I have both BLN and Root altogether?
Pardon me if it's a stupid and so called 'noob' query but I'd really like to know this.
Regards.

different kernel does different things.But if your phone has already been rooted,I thought root will stay in your system,after your flash N kernel,you can use BLN with root.
That's what I think,maybe is not true

I've tried several kernel. one of my favorite is ninpo 2.0.5. battery life look good and it run faster.. angelom kernel also good but i've got issues on angelom 16 and 18.. phone run hot when using WiFi.. but angelom give me the best battery life when it come to idle.. but drain fast when i'm surfing..
will try speedMod kernel.. could some one give me some review on this kernel?
Thanks in advanced..

Hi, I am a noob so please help us out?
Flashed my SGS2 (first time android phone)with CF Kernal KG1 to get root, and bloatfreezer to freeze Samsung and Optus crap as per lists on XDA. Rather than getting better battery life I have noticed a quick drain on the battery. Namely Android OS which uses about 50% overnight.
Is this normal? what can be done?

I dont see much of a difference between CF-Root kernel, speedmod, and ninpethaine 2.0.2 - 2.0.5. Except speedmod doesnt allow CPU monitoring, overclocking and undervolting.

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I did try speed mod and honestly, I feel ninpo give better life than speedmod. Well it could just be me but I just tested it at average usage...So, yeah...

zzkonzz said:
Hi, I am a noob so please help us out?
Flashed my SGS2 (first time android phone)with CF Kernal KG1 to get root, and bloatfreezer to freeze Samsung and Optus crap as per lists on XDA. Rather than getting better battery life I have noticed a quick drain on the battery. Namely Android OS which uses about 50% overnight.
Is this normal? what can be done?
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Well honestly, if I remember clearly, there is an OS bug currently. However, why don't you try on other such as KG6 or KG3?
Also, did you install anything middle of the way? Could be an app or something?

how do i install ninphetamine 2.0.5 on Litening Rom 5.0 ?

chiggah said:
how do i install ninphetamine 2.0.5 on Litening Rom 5.0 ?
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Via Odin I think. Select the .tar under PDA.

Related

most economical rom?

Hey guys I love all these custom ROM's but honestly the battery gets drained so fast it takes the fun out of it. I was wondering if there was any specific ROMs that were easier on the battery>?? The only feature I truly use on these things is the wifi tether, other than that I don't care if the phone is a litte slower etc, i just want to be able to make it a day on 1 battery..TIA
I can easily make it a full day with the PowerWashed 2.0b3. Yet I also have Juice Defender Ultimate installed.
Ill be quite honest, gingerbread is not what its cracked up to be imo... I have found that powerwashed 1.2 ed05 froyo w/ pbj 0808 kernal is one of the most stable roms out there. Im getting between 1.5-2% percent battery drain per hr. That means I go 2 days without charging the phone with normal use. Heavy use such as browsing the internet for a couple hrs and sending dozens of texts usually equates to charging the battery once a day or slightly better. The only issue is not all fascinates play nice with the -100 undervolt that the pbj kernal has built in. If thats the case, then just run the otb fusion kernal that come with pw 1.2...battery life is still good(2.5% per hr) and you can overclock with that kernal, but truthfully overclocking does not really improve much imo.
Wow thanks guys! Yea I am on MIUI and its horrible.. I will look into the ROMs you guys suggested..thanks!
vanilla gb is insane. running with the glitch 9/15 kernel, undervolted, smartass, noop and usas tweak applied, simply the fastest rom i've ever used battery is also holding up really well, but I have the naztech 2400 installed just yesterday, so battery should only get better with more charges. pwgb is also really good, but the file system is still samsung rfs, which is really slow. Pw froyo is probably the better choice for most people with pbjt kernel which has voodoo. Ill stick with vgb and see how battery does and if it doest yield me 6hrs of screen on time ill switch back to pw froyo and see how it does.
droidstyle said:
Ill be quite honest, gingerbread is not what its cracked up to be imo... I have found that powerwashed 1.2 ed05 froyo w/ pbj 0808 kernal is one of the most stable roms out there. Im getting between 1.5-2% percent battery drain per hr. That means I go 2 days without charging the phone with normal use. Heavy use such as browsing the internet for a couple hrs and sending dozens of texts usually equates to charging the battery once a day or slightly better. The only issue is not all fascinates play nice with the -100 undervolt that the pbj kernal has built in. If thats the case, then just run the otb fusion kernal that come with pw 1.2...battery life is still good(2.5% per hr) and you can overclock with that kernal, but truthfully overclocking does not really improve much imo.
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I went ahead and did the switch to ed05 pw 1.2... What kind of probs would I have if the pbj -100 didn't agree with my device?
I honestly do not know how to overlock/mess with uv settings. I am just looking for the most stable rom with the best battery life..battery life being the most important
chargerfn909 said:
I went ahead and did the switch to ed05 pw 1.2... What kind of probs would I have if the pbj -100 didn't agree with my device?
I honestly do not know how to overlock/mess with uv settings. I am just looking for the most stable rom with the best battery life..battery life being the most important
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your phone will freeze up...if it didnt your good to go! Make sure you wipe battery stats in cwm or it will take few charge cycle before you get good battery life.
droidstyle said:
your phone will freeze up...if it didnt your good to go! Make sure you wipe battery stats in cwm or it will take few charge cycle before you get good battery life.
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Ok sweet! Yea, everything seems to be good, only issue I am having is in BLN it says the Biblight isnt working or something like that..Voodoo control is g2g, just the BLN. I'll have to look into it
I had the same problem with bln not working on this kernel. What worked for me was to flash the older 0531 kernel first,then flash the 0808 kernel. Bln works fine after that.
Sent from my SCH-I500 using xda premium
The last super rom I had (battery wise) was superdark dj05... I could listen to music for 8 hours and have 70% battery left... 10 hours of light use 87%.. There has been no gingerbread rom to come close to that sweet sweet rom
Sent from the fascinate that holds the record benchmark on antutu
neh4pres said:
The last super rom I had (battery wise) was superdark dj05... I could listen to music for 8 hours and have 70% battery left... 10 hours of light use 87%.. There has been no gingerbread rom to come close to that sweet sweet rom
Sent from the fascinate that holds the record benchmark on antutu
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Edit... I'll search for my screen shots of the battery usage.. Prob. Take a few days tho
Sent from the fascinate that holds the record benchmark on antutu
neh4pres said:
The last super rom I had (battery wise) was superdark dj05... I could listen to music for 8 hours and have 70% battery left... 10 hours of light use 87%.. There has been no gingerbread rom to come close to that sweet sweet rom
Sent from the fascinate that holds the record benchmark on antutu
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Actually pwgb beta 3 with adrenaline shot mod is yielding some crazy results for me. Screenshots to follow when battery decides its held on long enough.
Only my 2nd day on ED05 powerwashed w/ pbj0808, but man I must be doing something wrong. At BEST my battery is draining roughly 5% an hour and thats with practically little to no use. NO clue how you guys are getting such good battery life...
Seriously, just odin the pwgb and flash the adrenaline v7 and thank me later.
davwman said:
Seriously, just odin the pwgb and flash the adrenaline v7 and thank me later.
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What kind of programs do you have open/on, on a daily basis? I found that twitter absolutely destroyed my battery. I actually turned notifications off unless its a DM or @ me, otherwise I just open Plume and refresh to read the timelines.
Its doing A LOT better since then. I haven't used the phone much, but its only at 75% and Its 140pm, been off the charger since 6am
I am gonna see how it is this weekend when I am actually using it more
@Droidstyle: I was thinkin of trying out for starters the rom you recommended "powerwash 1.2 ed05 froyo w/ pbj 0808 kernal" but when i did a search for powerwash 1.2 the thread mentioned that it was outdated and to try gingerbread...just a little confused since i'm still new at this: considering my samsungs fascinate uses this base band (this is the general info of my phone Model : SCH-I500
Firmware Version 2.2.2
Baseband Version: S:I500.04 V.ED05
Kernel: Version 2.6.32.9 )
i will have to use a rom that supports ED05? or am i okay to try out any of these roms? did a lot of reasearch today, just trying to narrow it down as to which rom will be the most apt for me (meaning which one will i get the best use out of) and what will i be able to do after that? do i apply themes from the themes section, or i can only do that if they correspond to that specific rom? to anyone in the room please enlighten me, i've spent almost all of today researching this and would greatly appreciate help from the experienced...
Bangout82 said:
@Droidstyle: I was thinkin of trying out for starters the rom you recommended "powerwash 1.2 ed05 froyo w/ pbj 0808 kernal" but when i did a search for powerwash 1.2 the thread mentioned that it was outdated and to try gingerbread...just a little confused since i'm still new at this: considering my samsungs fascinate uses this base band (this is the general info of my phone Model : SCH-I500
Firmware Version 2.2.2
Baseband Version: S:I500.04 V.ED05
Kernel: Version 2.6.32.9 )
i will have to use a rom that supports ED05? or am i okay to try out any of these roms? did a lot of reasearch today, just trying to narrow it down as to which rom will be the most apt for me (meaning which one will i get the best use out of) and what will i be able to do after that? do i apply themes from the themes section, or i can only do that if they correspond to that specific rom? to anyone in the room please enlighten me, i've spent almost all of today researching this and would greatly appreciate help from the experienced...
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Im not sure why he did that... Its a very functional rom and is up to date as much as it needs to be. Read my guide, uses that rom for an example on how to install a froyo rom. You are not limited to what your base band shows, you can flash 2.3.4 gingerbread roms if u like,, but they still have a few minor bugs. Actually 2.2.2 pw 1.2 ed05 is the most functional rom up to date imo... everything lse still has minor bugs to work out.
@DroidStyle thanks man, your guide to flashing power wash is pretty direct, but i'm a little lost here...Isn't the Rom mgr. program you install for the market used for flashin the Roms so that you don't have to odin the rom to the fascinate? also, can I apply whatever themes? ...ie: are those used to customize ur GUI?
Bangout82 said:
@DroidStyle thanks man, your guide to flashing power wash is pretty direct, but i'm a little lost here...Isn't the Rom mgr. program you install for the market used for flashin the Roms so that you don't have to odin the rom to the fascinate? also, can I apply whatever themes? ...ie: are those used to customize ur GUI?
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Stay away from rom manager!!!! It only works for the mtd based roms such as cm7, miui, aosp... even then odin is a much more reliable way to work with the fascinate. imo just get use to the fact that your going to have to use odin most of the time when flashing.

In your opinion. Best Kernel for Battery Life?

I've used ninphetamine 2.1.3+ and it used to drain my battery a fair bit. After having seen another user who said he was experiencing better battery life with ninphetamine 2.0.5. I flashed the older version and it turns out to be indeed better.
My idle drain rate is now 15-17mA using Battery Monitor widget.
So when put in picture. Drain rate is about 2% per hour with minimal usage. (Note 3g data was on)
Anyone else have a better kernel?
EDIT 1:
I've tried using SiyahKernel (KI3) and it seems that according to Battery Monitor widget the idle battery drain is 14-15ma. Seems to be much better. However, occasionally the touchscreen freezes and only the touch button works. But then again it could have been because I was using the KI3 kernel on a KH3 rom. Would report back after I finally get off my lazy ass and flash a KI3 rom
EDIT 2:
Got off my lazy ass finally. Flashed LeoMar 2.7.1 rom with SiyahKernel 1.7.8. Will report back after a while. Though I must say that for some reasons after the boot animation the phone turns black for quite a long time (1-4 Seconds) before the lockscreen appears. This did not happened with the default LeoMar 2.7.1 kernel. Will report back in 24 Hours.
http://forum.xda-developers.com/search.php?searchid=92694072&pp=25
Lennyz1988 said:
http://forum.xda-developers.com/search.php?searchid=92694072&pp=25
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Thanks sherlock. I posted my findings and was asking if anyone else had better. If it the time of the month of you. Stay off this forum.
Personally I find it very difficult to make meaningful comparisons, especially at idle.
Battery Monitor Widget gives estimates and not actual current drain. See this thread for some discussion: http://forum.xda-developers.com/showthread.php?t=1056486 but basically it's either not in Samsung's battery driver or the app is not reading the information. So you are comparing estimates and the margin for error might be pretty large.
When you flash new kernels you also need to recalibrate the battery. That also affects your battery drain estimates. (I've had Battery Monitor Widget tell me my battery is going up when its unplugged, so go figure.)
Battery life at idle is affected by so many factors. Maybe your signal strength is better one day than another. Or you got more emails or did more syncing. Or one app just happen to glitch and have a very long wakelock. If you get battery drain, you should be checking your partial wakelocks with BetterBatteryStats. Did you get more partial wakelocks when you were running Nin 2.1.3? Is it the kernel's fault or did you just have a misbehaving app?
I like experimenting with different kernels too, so my point is don't expect miracles when somebody says Kernel X gives amazing battery life compared to Kernel Y. Personally I think they are all about the same at idle, and the big differences are in your settings and your usage. If you wipe your phone, don't add any Google or Exchange accounts, and don't sync or download anything, your battery will last 3 or 4 days on idle no matter what kernel you use.
Stock rooted KI3 (cf-root) is the best for battery life for me, i also have constat 3800+ quadrant score (with top of 4109 as my screenshot in leomar 2.7 rom thread).
Also i have the phone a lot, but really a lot less hot while gaming or stressing it.
KI3 stock kernel and SiyahKernel are at the moment the best in battery life. Anything else is running on older sources and drain more.
The best for me is SpeedMod! Smooth and long life battery. There is something you can't do (bootanimation oc uv bln) but simply great!
Inviato dal mio GT-I9100 usando Tapatalk
best results for me: stock kernel reflashed after rooting, for that stock rom.
Bar none the way to go.
Stock Rooted KI3 does look good, am yet to test it though
Hmm. So seems like you guys are experiencing deliciously good battery life with KI3 kernel. I shall try it and report back with some numbers.
try siyah kernel. one of the fastest growing kernels IMO
For me is Ninphetamine 2.1.3 and now i'm trying SiyahKernel 1.7.7
My question is.. between stock ki3 and SiyahKernel 1.7.7 the difference is really small (barely notice it) or big?
I tend to not flash to much kernels since the very small chance to corrupt the efs folder (even if ofc i have my backup), so if it's only small improvement, i stay on the stock ki3, if it improves a lot, i prolly try it
I've been using the siyah kernel v1.7.7 and I've been experiencing a great battery life. I didn't use the stock kernel for long to make a comparison but I sugest you give siyah at least a try, since you can always go back to stock if you don't like ir.
Updated 1st post with my new findings.
info5i2002 said:
Updated 1st post with my new findings.
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batistaRom and ninp 2.0.5 great battery life for me...if you like i can post screenshots if anyone is using setcpu, depending on your kernel try and research in the kernel thread regarding frequencies that other users suggest and adjust yours accordingly...thats what i have done for mine and i could not be any more happier
Alright. I've finally got off my lazy ass and flashed a 2.3.5 rom (LeoMar if you must know) and am currently using siyah 1.7.8. Will report back within 24 hours after I've put the device through a day's use.
cf root KI3 stock kernel on RevolutionRom 2.7.1.
53 hours battery life 3 hours 19mins screen time wifi on 1/3 time, 4g on 2/3 time with facebook sync.
scorpion667 said:
cf root KI3 stock kernel on RevolutionRom 2.7.1.
53 hours battery life 3 hours 19mins screen time wifi on 1/3 time, 4g on 2/3 time with facebook sync.
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Pix or it didn't happen
Hi, I posted earlier saying that siyah 1.7.7 gave me good battery life. I tried now the cf root v4.2 KI3 and I had better results. Well, I'm someone that don't play many games, but I surf a lot and download a lot of stuff on wifi. I don't care much for overclocking so I think I'm going to stay wth KI3 cf root. For me they're both great for battery life, and maybe the other ones I have not tried are great also (speedmod, ragemod, ninphetamine...)
I think what happens with kernels, and this happens also with custom ROMs (and everything really, brands, etc..) is there is a lot of fanaticism. People like to choose one ROM and kernel and stick to them. They start to defend the kernels they use convincing themselves they're the best no matter what. That is in my opinion the reason because this kind of discussion turns meaningless. Well not that meaningless, at least it gives an idea of the kernels people are using, at least we know speedmod, ragemod, siyah, nimph, are all great kernels.
I'm not criticizing anyone, in fact, I'm just another example of the people I described.

[Q] Best kernel on SGS2 with cognition rom

Hello everyone.
I'm a cognition rom user (currently 1.5.1) for quite some time. Everything is fine, no bugs, no problems at all.
I'd like to ask you guys if anyone has tried another kernel other than ninphetamine that the rom comes with, and had better speed/response/battery life.
Any suggestions?
If you manage to get to my reply beneath that monstrosity of a signature, there's currently 9,365 posts of discussion in its thread [ROM][2.3.5][XXKI3] Cognition S2 v1.6 | Now Live!.
If you're looking for opinions about something related to the use of that ROM, I'd suggest reading through that thread. Searching that thread for "kernel" returned 945 posts.
Siyah, Speedmod or stock based CF Root are the most popular as the moment.
nikzDHD said:
Siyah, Speedmod or stock based CF Root are the most popular as the moment.
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Ninphetamine development kinda stopped at 2.1.3 a while back.
Speedmod, at least the last time I tried, lacked quite some features. It doesn't even do custom boot animation.
Siyahkernel, very good. Pretty much all governor/schedules are there with NTFS support, bln, and very active in development.
CF-root kernel, as stock as it gets. For 2.3.5 anyway, it's been reported to have great battery life. But it doesn't have many functions beyond that.
In any case, the battery life on each kernel, if you don't oc/uc/ov/uv, you won't see much difference. The android os bug, which drains your battery, still happens in all kernels occasionally, when it doesn't happen, battery life depends on your other apps running in the background.
Sent from my GT-I9100 using Tapatalk

Battery life on Shostock3

Okay. So I am currently running shostock3 on my sgs2 with siyah kernal. I read the article from zedomax on galaxys2root.com that it has very good battery life and very stable but when i am running it, I have terrible battery life and i am currently underclocked or whatever the word is. Is there anyway to fix this?
My advice, run SHOstock3 as it was released. It runs great as shoman94 dev'd it.
...and stay away from that web site u mentioned.
Stick to XDA. Period!
Sent from my SAMSUNG-SGH-I747 using xda premium
Yes. I'm running shostock3 with the included kernel and get good battery life.
Sent from my SGH-I777 using xda premium
Getting great battery life on Shostock3 V3.0. Flashed the AJK 1.52s kernel. Checkout Better battery stats...see if you have wakelocks killing your battery. And..I agree that website is no good..stick to XDA.
Sent from my SGH-I777 using xda premium
gainstatom said:
Okay. So I am currently running shostock3 on my sgs2 with siyah kernal. I read the article from zedomax on galaxys2root.com that it has very good battery life and very stable but when i am running it, I have terrible battery life and i am currently underclocked or whatever the word is. Is there anyway to fix this?
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which siyah kernel u r using. as far as i know theres no siyah kernel to run with shostock 3 except for ajk's (ktoonsez stopped working on siyah kernel for jb i777 after release of 4.3.3).
EQ2192012 said:
Getting great battery life on Shostock3 V3.0. Flashed the AJK 1.52s kernel. Checkout Better battery stats...see if you have wakelocks killing your battery. And..I agree that website is no good..stick to XDA.
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Most people get really good battery life on SHOstock3. Just search the SHOstock3 thread for the word battery to see what I mean. If you're not getting good battery life, you need to find out what in your configuration is causing the problem, and fix it. There is a thread in the general section started by Entropy512 that you should study to help you identify where the problem is.
I was on GB ShoStock for a long time thinking ICS and JB would never leave me satisfied on battery life.
http://forum.xda-developers.com/showthread.php?t=1353513
Finally came to my senses and tried out ShoStock 3 and have never looked back. To make it short the best Rom Ive ever flashed for any device I have had in the present and past.
You definitely have a rogue app killing your battery, find out which one it is and uninstall.
gainstatom said:
Okay. So I am currently running shostock3 on my sgs2 with siyah kernal. I read the article from zedomax on galaxys2root.com that it has very good battery life and very stable but when i am running it, I have terrible battery life and i am currently underclocked or whatever the word is. Is there anyway to fix this?
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Sorry you have battery life problems.
I have been running Shostock3 since it came out (it's version 3.02 today!), but I also been on and off at least five (wow can it be that many?) JB roms on my SGH-i777 (won't even mention the # GB roms here!). After trying many, I must agree with the other posters who state that this rom delivers very good battery life when compared to stock and when compared with other custom roms.
Lately, it has delivered the best battery life I have ever had on this phone using any rom (although SlimBean JB provided very very good battery life for me recently as well! Also UnNamed was great for battery life in the old GB days )
I followed the recommendations made by creepyncrawly to read Entropy's (& others) battery notes/faqs. They provide some really good background, some with that typical "XDA flavor" (read technical!. That material, plus some more plain old simple user adjustments to how and what I use on the phone have improved my phone's battery time; and it might help you as well.
It really boils down to the fact that each phone user loads different apps and our usage patterns vary.
Assume that you've flashed it and let it settle for a few days and several recharge cycles. After doing this you can see what YOUR "norms" are. They may be good or bad, but that's the baseline for you with this rom and with the apps and usage pattern you have.
(You can tweak voltage and speed (well, not speed on SS3!), but my experience has been that the more noticeable changes will be by adjusting your pattern of use, or doing the "hunt for the app" (or apps) that are burning down your run times when not in use.
Not many here seem to like or do this, but I would also try one of those "help-you-with-battery-use" apps --like juice defender (Ok, I get that many here seem to think it a waste, but it really did help me --a little-- when I used it); or get DS Battery saver (a bit more aggressive and noticeable, but you also notice the lag while you wait for things to turn on when you want them).
Actually, these may not be precision solutions, and don't focus on your specific phone app use, but they do work in a macro way to slow battery use and simply working with them for a few days or weeks will provide you with a better a sense of what the heck is going on under the plastic; they will cause you to look at what you have/run and when.
Oh, this includes using Better Battery Stats, which is fine for reporting out exactly which the apps behave --or don't-- and by how much and when. I'm not slow (well, that slow but it frankly, it took me quite a while to figure out what I was reading in the BBS readouts and what they meant! (Now, after a year+ or so of using it, I don't even have it loaded, since I've done the fiddling I need --and BBS, plus those other battery apps, helped me to figure out what apps worked well, what apps I was willing to sacrifice battery on and what apps were useless and should be tossed.)
Finally, some roms just don't work for people! So it's not worth the frustration chasing something you may not be able to achieve with this or another rom. (You probably read how individuals have problems that you don't -yet, you run the same rom and the same phone! That is our world. So, too, you will read about some who make amazing claims on how long they continue on one charge. Some are pretty amazing, and some may even be real
My final five cents would be:
#1 run the rom a couple of days, get a baseline. Then switch from Jeboo kernel to AJK's latest for TW (I think it is 1.25ss, but I really also had great results from 1.48s) and run it a few more days. They were pretty much even for me, but others find one or the other kernel makes a real difference!). Compare after doing the same activities through a charge or two.
#2 If your battery life remains "poor," note what poor really is (ex. how much screen time? and how much total run time prior to getting to zero or 10-15%? ...something like that).
#3. Then get BBS and one of the "automatic" battery-saver programs and work with it for about 4-5 days and that many recharge cycles. See what your norms are but do it for the same type of usage!!! If better while using the battery fixers, then you can work at picking off the app or apps that are sucking your battery more than you want. Not as tedious as it sounds. Of course, staying with a rom for three weeks might be a challenge :laugh:, but this is a nice rom to work with.
#4. I don't think you will need to under-volt to get good BL. I wonder if your phone is stable in doing that? Or, does it induce additional lag? That might be a high price to pay for more run time. (You could compare the UV results with your "norm" as well!)
#5. Finally, we are on Galaxy S2 Sgh-i777 -and can change batteries all day long for not so much per battery! It is not elegant, but it works. (Done it myself several times -even with good battery life).
Good Luck!
Best ROM, Good battery life... been with Shoman's ROM since shostock2 never have a problem with the battery life...
Sent from my SGH-I777 using xda premium

[Q] Stock vs Custom Kernel

haven't seen this discussed too much, and I'm curoius what others are seeing with battery life when it comes to Stock vs Custom kernels...
Hands down stock kernel, has seemed to be better than any custom kernel i've tried for battery life. and maybe i'm doing something wrong, I've tried all sorts of rom / kernel combos and can't seem to beat stock kernel...
Are you guys seeing something different?
I'd love your opinions!
Thanks guys!
(I'm strictly talking about Battery life - normal use)
BossJ said:
haven't seen this discussed too much, and I'm curoius what others are seeing with battery life when it comes to Stock vs Custom kernels...
Hands down stock kernel, has seemed to be better than any custom kernel i've tried for battery life. and maybe i'm doing something wrong, I've tried all sorts of rom / kernel combos and can't seem to beat stock kernel...
Are you guys seeing something different?
I'd love your opinions!
Thanks guys!
(I'm strictly talking about Battery life - normal use)
Click to expand...
Click to collapse
Ive definately noticed this too BossJ
I don't flash custom kernels for battery life.
sent from my blu vzw gs4

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