[Q] Questions about kernels - Sprint Samsung Galaxy S III

I'm new to Android. I made a few posts on here making that abundantly clear (lol). I am just wondering, what exact part of the OS is the kernel? For example, I'm using LiquidSmooth with the default kernel that was included with that. If I were to flash the ktoonsez kernel, what changes would I see? Also, could someone point me to a site where I can download the KT kernel for LiquidSmooth 4.2.1 JellyBean Beta 2? What other kernels are there? What are the advantages of using them? And finally, where can I find them?
I'm looking for a way to conserve battery life right now, but not take away from how my phone currently looks. Sorry for asking such a stupid set of questions, but I'd like to know about this since I plan on sticking with Android. And if that's the case, I wanna learn all about the neat things I can do to make my phone customized, sleek looking, and effective.
Thanks in advance for helping out this new comer to the Android scene

The kernel is the interface between the devices software and hardware. Its basically a bundle of drivers and code to tell the hardware and software how to communicate. All computers use a kernel from windoze to OSux and Linux. Android is based around a modified version of the Linux kernel. You won't see any visual changes when you flash a kernel. And you can find em here in the development or original development sub forums
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Cool thanks for the detailed explanation. I never really took the time to look up the exact purpose of kernels in an OS but you just explained it to me perfectly.
So, are there any kernels that are better for say battery conservation and performance?
Sent from my SPH-L710 using Tapatalk 2

That all depends on your settings and usage. Theres no one way to get the best battery and performance for your usage, mostly just trial and error trying out different settings and tweaks til you find what works for you. For a good battery performance balance undervolting and overclocking work well. For instance I'm on a note 2 and im overclocked to 1.8ghz and undervolted by 75mv across the board and get almost identical battery to stock, however I still gain in performance without sacrificing battery. Now if I drop my clock rate back to stock and keep the undervolting I get same performance as on stock but my battery life increases by a few hours.
Sent from my SPH-L900 using Xparent ICS Tapatalk 2

davelikestacos said:
I'm new to Android. I made a few posts on here making that abundantly clear (lol). I am just wondering, what exact part of the OS is the kernel? For example, I'm using LiquidSmooth with the default kernel that was included with that. If I were to flash the ktoonsez kernel, what changes would I see? Also, could someone point me to a site where I can download the KT kernel for LiquidSmooth 4.2.1 JellyBean Beta 2? What other kernels are there? What are the advantages of using them? And finally, where can I find them?
I'm looking for a way to conserve battery life right now, but not take away from how my phone currently looks. Sorry for asking such a stupid set of questions, but I'd like to know about this since I plan on sticking with Android. And if that's the case, I wanna learn all about the neat things I can do to make my phone customized, sleek looking, and effective.
Thanks in advance for helping out this new comer to the Android scene
Click to expand...
Click to collapse
Check out the how to thread in general. Should be right up at the top... Great battery and great performance on the ktoonsz kernel with lots of different options! If I knew how to copy and paste the link from the stupid xda app, I would!
Edit: I am an idiot...here ya go...
http://forum.xda-developers.com/showthread.php?p=35101228
[Team Kernelizers] {how to} JB and TPR roms
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adamdelozier said:
Check out the how to thread in general. Should be right up at the top... Great battery and great performance on the ktoonsz kernel with lots of different options! If I knew how to copy and paste the link from the stupid xda app, I would!
Sent from my SPH-L710 using xda premium
Click to expand...
Click to collapse
Long press the thread and click copy url :thumbup:
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-EViL-KoNCEPTz- said:
Long press the thread and click copy url :thumbup:
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Click to expand...
Click to collapse
As edited above...I am an idiot! Haha
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Heres a battery life thread too http://forum.xda-developers.com/showthread.php?t=1830157
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Here are some current stats using assorted tweaks from that thread. My screen shot app is horrible... Sorry for the sideways pic.
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adamdelozier said:
Here are some current stats using assorted tweaks from that thread. My screen shot app is horrible... Sorry for the sideways pic.
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Click to expand...
Click to collapse
I can't seem to see your thumbnail. Do I have to enable an option in the settings to view thumbnails?
And thanks for all the replies guys, I appreciate the input

davelikestacos said:
I can't seem to see your thumbnail. Do I have to enable an option in the settings to view thumbnails?
And thanks for all the replies guys, I appreciate the input
Click to expand...
Click to collapse
Not that I know of...total batt time 1 day 10 hours. Screen on time 3 hours 45 minutes with about 15% left.
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1 day and 10 hours?! Wow! I'm lucky if I get 8-9 hours. I am going to start disabling WiFi when I am walking around though. I just flashed over to the KT kernel and I am going to try optimizing my settings with the ones that were in that Kernelizers thread.

davelikestacos said:
1 day and 10 hours?! Wow! I'm lucky if I get 8-9 hours. I am going to start disabling WiFi when I am walking around though. I just flashed over to the KT kernel and I am going to try optimizing my settings with the ones that were in that Kernelizers thread.
Click to expand...
Click to collapse
Check out DS Battery Saver Pro. Handles WiFi disabling for you...less bloat than Juice defender. Screen filter helps with screen brightness...and I am undervolted pretty good too. Good luck! I am now at 1d 12 hr. 4:44 screen on. 2% batt left!
Sent from my SPH-L710 using xda premium

adamdelozier said:
Check out DS Battery Saver Pro. Handles WiFi disabling for you...less bloat than Juice defender. Screen filter helps with screen brightness...and I am undervolted pretty good too. Good luck! I am now at 1d 12 hr. 4:44 screen on. 2% batt left!
Sent from my SPH-L710 using xda premium
Click to expand...
Click to collapse
Awesome, installed the KT kernel and used the settings listed in the Kernelizers thread. I also installed DS Battery Saver Pro and now my battery life is amazing. Left my house at 7:05AM this morning and on my way to work over the course of the hour my battery dropped 3%. Usually, my battery would drop 10% - 15% during this time so I am VERY happy with the outcome.
Thanks for all the help guys

davelikestacos said:
Awesome, installed the KT kernel and used the settings listed in the Kernelizers thread. I also installed DS Battery Saver Pro and now my battery life is amazing. Left my house at 7:05AM this morning and on my way to work over the course of the hour my battery dropped 3%. Usually, my battery would drop 10% - 15% during this time so I am VERY happy with the outcome.
Thanks for all the help guys
Click to expand...
Click to collapse
Glad it worked out! Did you undervolt yet...more battery savings there too...and very little drop in performance.
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Related

Touchwiz or CM7 for battery life?

Which one gives the best all around battery life? I've been using CleanGB and I'm debating switching to another touchwiz rom (if it had better battery life) or CM7 with nyan colonel.
P.S. If you try to give me a speech about how battery life only depends on usage I'll punch you in the face.
CM7 for me, touchwiz for others...
Sent from my SPH-D700 using Tapatalk 2
More of a question so moved to q&a.
Now it does not ONLY depend on how you use your phone but it certainly is mainly that. There are some things CM7 is more efficient at than TW and a few things TW is more efficient at since TW is supposed to be optimized for our phone. Then throw in the variety of kernels to try on each. No one is going to be able to give you a definitive answer. You will have to try it for yourself. The time it takes to flash is less time than it will take you to get an answer.
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marcusant said:
CM7 for me, touchwiz for others...
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Click to expand...
Click to collapse
+1 for me
I just noticed there's fifty five hundred and eight topics in Q and A.. and to think this is the only topic about battery life on the epic!
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It depends on usage.
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b16flybye said:
It depends on usage.
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Click to expand...
Click to collapse
Speech!
Speech!
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shadowlink217 said:
P.S. If you try to give me a speech about how battery life only depends on usage I'll punch you in the face.
Click to expand...
Click to collapse
I had a dream! All battery life depends on usage! All roms are equal and it all comes down to how you use your phone!
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marcusant said:
I had a dream! All battery life depends on usage! All roms are equal and it all comes down to how you use your phone!
Sent from my SPH-D700 using Tapatalk 2
Click to expand...
Click to collapse
I don't want to punch you in the face you're like my favorite dev
shadowlink217 said:
Which one gives the best all around battery life? I've been using CleanGB and I'm debating switching to another touchwiz rom (if it had better battery life) or CM7 with nyan colonel.
P.S. If you try to give me a speech about how battery life only depends on usage I'll punch you in the face.
Click to expand...
Click to collapse
Clean gb has the better battery life.
After using tw for a log time, and cm7 and cm9 for a few months each, with about the same usage pattern on each, here's what I've experienced.
CM7 > TW > CM9
CM7 seemed like a huge improvement over tw for both battery life and general non-suckingness. CM9 is pretty bad on battery life, but its awesome enough in other ways that I still use it and have no plans of going back.
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ROM With best battery life?

Hey guys, just wondering what's a ROM/Kernel combo with the best battery life ? I'm on Stock right now and I get about 7hrs and 5 of those hours are on Standby lol. I tried Android Revolution with Trinity and got about 12 with about 6 of those hours on standby and 6 hours of very light usage. I did flash a rom the other day that gave me about 23hrs with light usage but I can't remember what it was >_<
Thanks
Stop making these threads. Pleaaaaseeeeee.
Stock.
Sent from my Galaxy Nexus
Minco v4 works on standby maybe 2-3 calls and bad service in my home I get in 12 hours from 92% its drops to 82-80 % and that's with OC settings
Sent from my Galaxy Nexus using xda app-developers app
again?????? seriously?!!! battery life mostle depends in the kernel.
Whichever one works best on your individual phone in your unique circumstances. No one knows what will work best for you but yourself.
There's a reason mods lock the plethora of threads such as this. It's a pointledly subjective question and a waste of bandwidth.
Sent from my Galaxy Nexus using Tapatalk 2
This is with stock jelly bean first cycle
-----------
god is the creation of people with nowhere left to turn
minco4+franco
I've been very happy with codename android using the Franco kernel.
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Jellybro + trinity
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martonikaj said:
Stop making these threads. Pleaaaaseeeeee.
Click to expand...
Click to collapse
agreed. think of the pandas
Zepius said:
agreed. think of the pandas
Click to expand...
Click to collapse
Stock is best.
eventually all that will be left are the ugly pandas
The answer to this will be different for everybody, dependent on how you use your phone and for what. There is no universal answer. You have to find out what works best for you.
I know that's not a great answer, but it's the honest truth. I, personally, run Jellybro with Franco (on Wheatley), but that's for the mix of features, smoothness, and other factors.
Sent From My Toro+ via RED Tapatalk
Lol relax I didn't see a thread with this question xD. Thanks to those that replied though!!
Wolf Haley said:
Lol relax I didn't see a thread with this question xD. Thanks to those that replied though!!
Click to expand...
Click to collapse
Thats because they all got locked....
Sent From My Toro+ via RED Tapatalk
There are too many variables for these threads/questions to work, the easiest thing is just try different combinations until you find what works for you.
Closed

Roms with the best battery life.

I was wanting to know which ROM has the best battery life on the Gnex the CDMA version.
Thanks
Sent from my Galaxy Nexus using xda app-developers app
They are all pretty much the same IMO. The screen sucks up juice so keep it off as often as possible lol
xero925 said:
I was wanting to know which ROM has the best battery life on the Gnex the CDMA version.
Thanks
Sent from my Galaxy Nexus using xda app-developers app
Click to expand...
Click to collapse
If you want the latest software, most stable, and best battery life ROM, go with MMuzzy's AOSP ROM. Using it now, and its amazing
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ROMs themselves rarely ever have an actual impact on battery life. Most postive effects for battery come from the kernel, and negative ones from rogue apps.
Before you ask which kernel offers the best battery, it really depends on the requirements of the user and the phone itself. You'll just have to try a few.
Marisa said:
ROMs themselves rarely ever have an actual impact on battery life. Most postive effects for battery come from the kernel, and negative ones from rogue apps.
Before you ask which kernel offers the best battery, it really depends on the requirements of the user and the phone itself. You'll just have to try a few.
Click to expand...
Click to collapse
That's very true, IMHO LeanKernel is the absolute best.
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How do I switch out the kernel. I'm kind of a noob at this stuff...
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Flash it like you would a ROM. Make sure you find one that is for the version of android your ROM is based on. I would suggest tying Franco kernel, but there are many good ones.
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xero925 said:
How do I switch out the kernel. I'm kind of a noob at this stuff...
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Click to expand...
Click to collapse
FYI....this thread goes in general.
Flash kernel in cwm the same as you would have a rom. Be sure to clear cache/dalvik first.
For the moment the ROM with the best battery life is SlimRoms 2.7
Sent from my SAMSUNG-SGH-I747 using xda app-developers app
I've tried many ROMs and Kernels with no success in the battery life department.
My phone charger died so I downloaded an app...Easy Battery Saver...my phone was still at 34% after 1 day and 7 hours. I was NOT heavily using my phone but still this is the best battery life I have ever experienced. I was always on the "battery saver apps are useless" team until recently.
Don't get me wrong, I'm still flashing
Just love my new app.
i tried miui, pa, vicious, aopk, smooth, and now using cm10. tried out different kernals too,but at the end, all the roms cant pass 1hr 50mins of screen time.
zeke1988 said:
i tried miui, pa, vicious, aopk, smooth, and now using cm10. tried out different kernals too,but at the end, all the roms cant pass 1hr 50mins of screen time.
Click to expand...
Click to collapse
Hmm.. thats strange. I'm on MMuzzy's ROM which is pure AOSP and I get around 2 and a half hours of screen time. And some people around the forums have gotten around 5 hours of screen time with different combinations of ROMS and Kernels.
I have tried numerous roms, if not all of them for the galaxy nexus, and there is a difference between roms, even using the same kernel.
I have been getting amazing battery life using Eclipse.
Sent from my Galaxy Nexus using Tapatalk
The mods can move this thread, but in the mean time, it is a good question.
I used to get some awesome battery life. VZW + 2100mah. Typically 4 hours screen on time was normal.... now I'm lucky to get 1hr. I can't remember if it was the jelly bean update or the inclusion of Google Now.
Does letting the ROM settle really help? I have been getting terrible battery life out of my 2100mah. The battery just drains when the screen is off. No rogue apps, but this is a fresh install as of 24 hours ago
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I believe use what you like as long as you use Lean Kernel you should get good battery life.
ir13 said:
I believe use what you like as long as you use Lean Kernel you should get good battery life.
Click to expand...
Click to collapse
I wasn't going to put my 2 cents in but because there are so many complaints about this being in the wrong place, I just have to now.
I have tried many different ROM's and kernels and found there always seems to be the "right" combination sooner or later. Right now I am on AOKP w/Franco M6 and getting about 14 hours with 24% battery left, 2.5 hours screen time, mostly LTE and moderate phone use, best I have seen of any combo for me on this ROM. For CNA the right kernel for me was lean kernel. A little experimentation and patience and you will find that sweet spot soon enough.
Edit: the whining drew me to it, sucked me in so I couldn't stop myself from answering
If someone can get 4+ hours screen with mostly 3G, let me know. haha.
Wrong section
However as for battery life slim ROMs work great but I'm on jbsourcery built in trinity and I've definitely had worse d: the only ROM I've used that's had has battery is pa however they've had multiple updates since then so I'm sure its not horrible now
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2 things here:
1) OP, wrong section. Questions belong in their own section, the Q&A section. Development is reserved for Roms, kernels, tweaks, etc.
2) If you guys see something posted in the wrong section, report it. No need to get in an internet gang war about it. Us mods have a life too and we can not be here 24 hrs a day to watch over you. When you hit the report button, we see it.

[Q] What ROM are you currently running, and why?

I've went through many ROMs with my device, and I'm curious, what ROM and You currently running, and why? Looking forward to your response!
Also, if you can provide a link to the thread of the ROM that would be awesome, thanks!
DustCrow said:
I've went through many ROMs with my device, and I'm curious, what ROM and You currently running, and why? Looking forward to your response!
Click to expand...
Click to collapse
ROTLR was released around Halloween but it's smooth,great battery and I love the zombie theme
Hey, thanks for the reply! What does ROTLR stand for?
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Running the new fk23 jb rom. This thing is amazing u should try it if u like jb.
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How is the battery power? On a scale of 1-10 and why do you give it the rating you do?
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sasquatchotragavaca said:
Running the new fk23 jb rom. This thing is amazing u should try it if u like jb.
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Click to expand...
Click to collapse
Well just installed it taday. But there was a leak of it and battery was good. I would get about 13 hrs and about 3 1/2 hrs screen time. Im a really heavy user. From 1-10 I give it a 10. I think everybody running this will agree with me.
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Thanks! I might check it out! Do you have a link to the thread for it? I am somewhat new here, and even when I search for a ROM, I have trouble finding the thread :/ I'm not sure why.
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DustCrow said:
Hey, thanks for the reply! What does ROTLR stand for?
Sent from my SPH-D710 using xda premium
Click to expand...
Click to collapse
Return Of The Living Rejectz haha
DustCrow said:
Thanks! I might check it out! Do you have a link to the thread for it? I am somewhat new here, and even when I search for a ROM, I have trouble finding the thread :/ I'm not sure why.
Sent from my SPH-D710 using xda premium
Click to expand...
Click to collapse
Just remember its not like any other rom theres a couple of things u need to do to install it. Nothing to complicated just read the thread and if u like then install. Just please read read.
http://forum.xda-developers.com/showthread.php?p=34755891
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DustCrow said:
Thanks! I might check it out! Do you have a link to the thread for it? I am somewhat new here, and even when I search for a ROM, I have trouble finding the thread :/ I'm not sure why.
Sent from my SPH-D710 using xda premium
Click to expand...
Click to collapse
Just to warn you, I got horrid 3g speeds with fk23...But I think it could be an area thing...
fi27 and f127 modem with agat fi27 v0.6.8 with the rom call lightweight 0.5 its great I get around 9 hrs heavy uses sometimes when I im bored I switch to a backup of jb fk09 tweaked signed I get about 8 hrs heavy uses
Awesome, thanks for the reply! Just wondering, can you define 'heavy'? I personally use my phone at school all the time, I listen to music through headphones about 1/2 of my total day(4 hours or so) and I will also spend a lot of time texting, browsing the web, and using apps that use data. I'm honestly constantly on my phone, and will have to charge it around 3 times per day.
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Facebook twitter booty calls apps Netflix gaming web I have adhd so I'm always touching my phone
Sent from my SPH-D710 using Tapatalk 2
Right now I'm on miui trying it out for the first time getting used to no app drawer. Favorite ROM for a daily (if I had one lols) would have to be Living Rejects. I flash it at least twice a week. Its pretty much my goto when I need a good solid dependable ROM for GPS and coverage while traveling. The battery life is effin amazing and music come out really loud and clear. But I will say once our beloved devs get cm10/AOKP/PA etc running solid for jb I will prolly be going back to PA or try out KK again. I love the UK customization options. I ran ICS aokp as a daily until jb started seeping its way into my veins now I'm flashing like there's no tomorrow can't wait for volume bug fix ^^
Sent from my $500 Rolling tray
I run PA 2.54. I love being able to chg dpi per app easily and I am a CM fan. CM10 (which PA is built on) is fast and I get good battery.
calisro said:
I run PA 2.54. I love being able to chg dpi per app easily and I am a CM fan. CM10 (which PA is built on) is fast and I get good battery.
Click to expand...
Click to collapse
I remember trying PA, and I was getting absolutely terrible battery life. Is there something I may have done wrong?
DustCrow said:
I remember trying PA, and I was getting absolutely terrible battery life. Is there something I may have done wrong?
Click to expand...
Click to collapse
there were media bugs in cm10(pa base). those have been fixed.
Im running CNA Codename jb's rom, is amazing, great battery life, android 4.1.2, good level of costumization and amazing performance i seriously cannot hope anything else from my phone.
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I'm running blazer 4.1 gingerbread I like ics and jb but I always come back to blazer 4.1 gingerbread because to me it is the most stable, faster, and battery life is much much better.
Sent from My Sexy Epic Touch
I still use the calkulin v3.0 custom gingerbread rom because it has been the most stable, fastest, and longest lasting, battery life-wise. I recently tried the one-click fk23 jellybean but ran into some problems so I flashed back to calkulin...Gonna try the fk23 again tomorrow though. ;p

Best TouchWiz rom with stock kernel for best battery.

First of all I searched the forums
And if I missed something I'm am sorry for being a noob! (And stupid)
I'm not really enjoying kernels I'm not very good with UV and overclocking (not comfortable in doing so)
I'm jist curious what ROM you use (TouchWiz I need tmobile wifi calling)
Thanks and if this has been posted please inform me and ill delete. Thanks
Sent from my SGH-T999 using xda premium
JCNoobZ said:
First of all I searched the forums
And if I missed something I'm am sorry for being a noob! (And stupid)
I'm not really enjoying kernels I'm not very good with UV and overclocking (not comfortable in doing so)
I'm jist curious what ROM you use (TouchWiz I need tmobile wifi calling)
Thanks and if this has been posted please inform me and ill delete. Thanks
Sent from my SGH-T999 using xda premium
Click to expand...
Click to collapse
If you need Wifi Calling, S3Rx is pretty much the only option for you. Unless you want something older.
Yes thata what I've been using looks like ill keep using this.
Any ktweaker tips if I do move to a custom kernel
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JCNoobZ said:
Yes thata what I've been using looks like ill keep using this.
Any ktweaker tips if I do move to a custom kernel
Sent from my SGH-T999 using xda premium
Click to expand...
Click to collapse
Not sure why you would wan to? Battery is good on stock MD5 kernel.
I've just read that its better
Pist show people going days and days without charge.. kinda a battery whore thanks for your input
Cheers! :beer:
Sent from my SGH-T999 using xda premium
JCNoobZ said:
I've just read that its better
Pist show people going days and days without charge.. kinda a battery whore thanks for your input
Cheers! :beer:
Sent from my SGH-T999 using xda premium
Click to expand...
Click to collapse
My phone drains 0.2-0.3% per hour on the stock kernel (on wifi with a decent router). The TW custom kernels are not worth using, in my opinion. Now AOSP on the other hand... yikes. Pretty much have to use them.
Aerowinder said:
My phone drains 0.2-0.3% per hour on the stock kernel (on wifi with a decent router). The TW custom kernels are not worth using, in my opinion. Now AOSP on the other hand... yikes. Pretty much have to use them.
Click to expand...
Click to collapse
Thank you so much
So glad I joined XDA such amazing help and good people!
Thankd again man! Cheers! Have a nice weekend!!
Sent from my SGH-T999 using xda premium
I'm on project goosh with ktoonz kernel and battery is great. Again it's all about usage stuff like syncing should be off, apps updating every few hours should be off or prolonged just the little things.
Sent from my SGH-T999 using xda app-developers app
Read woodys battery thread if you havent already.
Sent from my SGH-T999 using xda premium
Aerowinder said:
My phone drains 0.2-0.3% per hour on the stock kernel (on wifi with a decent router). The TW custom kernels are not worth using, in my opinion. Now AOSP on the other hand... yikes. Pretty much have to use them.
Click to expand...
Click to collapse
You might want to take a look at your wake locks. If you are having that drain while the screen is off, it most likely a wake lock. Search the forums for better battery stats.
Sent from my Galaxy Nexus using Tapatalk 4 Beta
Your_rom by red is my favorite touchwiz rom. And it gives me the best battery for touchwiz. I use kinetic pulse kernel with it.
Sent from my SGH-T999 using xda app-developers app
tp2215 said:
You might want to take a look at your wake locks. If you are having that drain while the screen is off, it most likely a wake lock. Search the forums for better battery stats.
Sent from my Galaxy Nexus using Tapatalk 4 Beta
Click to expand...
Click to collapse
You sir are amazing!!! Jusr realized that I have lost a lot of battery when my devixr was locked thanks!!!
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falcons2 said:
Your_rom by red is my favorite touchwiz rom. And it gives me the best battery for touchwiz. I use kinetic pulse kernel with it.
Sent from my SGH-T999 using xda app-developers app
Click to expand...
Click to collapse
Will give that kernel a shot thanks!!
Sent from my SGH-T999 using xda premium
I'm running HyperDrive Rom and Ktoonsez Kernel. I have tweaked much of the cpu frequencies and used the ktoon governor. However, my battery life compared to the stock rom isn't that great.
Every phone is different so will run different on your phone. I do recommend Dandroid. It now has wifi calling. Complete based on T999. It used to be a port. It's super smooth with great battery life. And it's Cyanogenmod themed.
Sent from my SGH-T999 using Tapatalk 4 Beta
There are no "best" rom/kernel combinations for battery. It varies from phone to phone. You could try testing different TouchWiz roms and kernels, but remember to make a nandroid before doing so. Some roms you could try are wicked, stockorama, hyperdrive, etc. For the kernels you should use the stock kernel for stability or ktoonsez.

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