Database Develop

[Q] Best ROM/Kernel combination for battery life?

Hello World! What's your current ROM and kernel you're running on, and what do you normally get for screen on time? I'd like to get some suggestions.. Would like to get through a whole day comfortably

It doesn't really matter how much screen on time someone else gets, it doesn't mean you'll ever achieve that same amount. Screen uses a pretty constant amount of power per brightness setting, but the other things that use power will take away from that and not all those things are to do with CPU usage, which is the only thing a ROM/Kernel can affect.
On top of which:
"Best" ROM.
There is no such thing as a best ROM. The question itself is ambiguous. "Best" is obviously a subjective term.
What I want from a ROM may well differ from what you want from a ROM, ergo - what is best for me could be worst for you.
If you are asking what the most popular ROMs are, or which ROMs people are using, you can see which threads stay around on the first few pages (and have the most posts) in the Android Development or Original Android Development forums. You can also see what other people are running by reading the What are you running on your Nexus 5 thread.
If you are asking which is the most stable, being a Nexus device - they're all pretty stable.
If you are asking which is best on Battery, ROMs only affect battery if they have a feature that is badly coded. You will likely be able to read about this in the ROM threads. ROMs do not impact battery life. The only impact to battery life are your apps, your settings, how you use the phone and mostly, environmental issues such as Phone Signal.
For tips about improving battery life, please read [Battery Life Help] Troubleshoot battery issues here!
"Best" Kernel
There is no such thing as the "Best" kernel. What we all want from a kernel is different. Again, many people have the misconception that Kernels affect battery life. Let's get this cleared up. Although Kernel devs will build in optimisations and efficiencies that will improve battery life, these are very, VERY tiny...and if 1 kernel has these optimisations, they likely all have.
People will often say "Kernel x is better than kernel y for battery life". This is actually wrong. Kernels respond to user settings. Setting up the governor to favour either battery life or performance is simple enough to do, you just have to do some learning. The reason people think Kernel x is better than y is because developers set their kernels up with their preferred governor settings. This is what we refer to as out-of-the-box settings. The out-of-the-box settings for kernel x may well produce better battery results than the out-of-the-box settings for kernel y, which favour performance. The fact is, you as the user have the ability to tune kernel x or y to perform the same, be that battery or performance - so start learning how to do this yourselves - that way, you can choose the kernel based on the FEATURES you want, and not the fictional performance benefits of one kernel over another.
Hope this helps

rootSU said:
It doesn't really matter how much screen on time someone else gets, it doesn't mean you'll ever achieve that same amount. Screen uses a pretty constant amount of power per brightness setting, but the other things that use power will take away from that and not all those things are to do with CPU usage, which is the only thing a ROM/Kernel can affect.
On top of which:
"Best" ROM.
There is no such thing as a best ROM. The question itself is ambiguous. "Best" is obviously a subjective term.
What I want from a ROM may well differ from what you want from a ROM, ergo - what is best for me could be worst for you.
If you are asking what the most popular ROMs are, or which ROMs people are using, you can see which threads stay around on the first few pages (and have the most posts) in the Android Development or Original Android Development forums. You can also see what other people are running by reading the What are you running on your Nexus 5 thread.
If you are asking which is the most stable, being a Nexus device - they're all pretty stable.
If you are asking which is best on Battery, ROMs only affect battery if they have a feature that is badly coded. You will likely be able to read about this in the ROM threads. ROMs do not impact battery life. The only impact to battery life are your apps, your settings, how you use the phone and mostly, environmental issues such as Phone Signal.
For tips about improving battery life, please read [Battery Life Help] Troubleshoot battery issues here!
"Best" Kernel
There is no such thing as the "Best" kernel. What we all want from a kernel is different. Again, many people have the misconception that Kernels affect battery life. Let's get this cleared up. Although Kernel devs will build in optimisations and efficiencies that will improve battery life, these are very, VERY tiny...and if 1 kernel has these optimisations, they likely all have.
People will often say "Kernel x is better than kernel y for battery life". This is actually wrong. Kernels respond to user settings. Setting up the governor to favour either battery life or performance is simple enough to do, you just have to do some learning. The reason people think Kernel x is better than y is because developers set their kernels up with their preferred governor settings. This is what we refer to as out-of-the-box settings. The out-of-the-box settings for kernel x may well produce better battery results than the out-of-the-box settings for kernel y, which favour performance. The fact is, you as the user have the ability to tune kernel x or y to perform the same, be that battery or performance - so start learning how to do this yourselves - that way, you can choose the kernel based on the FEATURES you want, and not the fictional performance benefits of one kernel over another.
Hope this helps
Click to expand...
Click to collapse
Yup that does help... No such thing as 'best'. I didn't make the best title lol.. Currently happy with SlimLP and Franco, just wondering what you guys were getting . What are you on, as of now in terms of ROM/Kernel?

samdroid24 said:
Yup that does help... No such thing as 'best'. I didn't make the best title lol.. Currently happy with SlimLP and Franco, just wondering what you guys were getting . What are you on, as of now in terms of ROM/Kernel?
Click to expand...
Click to collapse
Slim + ElemantalX

samdroid24 said:
Hello World! What's your current ROM and kernel you're running on, and what do you normally get for screen on time? I'd like to get some suggestions.. Would like to get through a whole day comfortably
Click to expand...
Click to collapse
I hate the "it all depends on your phone, each one is different" bullcrap. That may be true to an extent, but some combos are generally going to be better than others. Besides, most people who ask this question just want to know what people are using and what is working for these people. So now that my rant is over, I'm using BrokenOS with Sensei Kernel R52. I'm getting roughly 4-5 hour SOT with roughly 50-60% brightness and 18 hours off the charger. I'm using the blacked out gapps that are linked with BrokenOS and using the black Swiftkey keyboard theme. All of the black saves battery when the screen is on because those pixels are off when using amoled screens. Don't know if you know that or not, but hey, it's there. Also, I've set the kernel minimum frequency to 223mhz using intelliplug with fsync and mpdecision off using the trickstermod app. I've set the scheduler to fiops and changed the read ahead value to 1024. This has consistently given me these results which I consider to be great! Hope that helps!

ccoulterjg1 said:
I hate the "it all depends on your phone, each one is different" bullcrap. That may be true to an extent, but some combos are generally going to be better than others. Besides, most people who ask this question just want to know what people are using and what is working for these people. So now that my rant is over, I'm using BrokenOS with Sensei Kernel R52. I'm getting roughly 4-5 hour SOT with roughly 50-60% brightness and 18 hours off the charger. I'm using the blacked out gapps that are linked with BrokenOS and using the black Swiftkey keyboard theme. All of the black saves battery when the screen is on because those pixels are off when using amoled screens. Don't know if you know that or not, but hey, it's there. Also, I've set the kernel minimum frequency to 223mhz using intelliplug with fsync and mpdecision off using the trickstermod app. I've set the scheduler to fiops and changed the read ahead value to 1024. This has consistently given me these results which I consider to be great! Hope that helps!
Click to expand...
Click to collapse
That helps greatly! Yes, this question was more of a 'Which ROM/Kernel is the best for you' type of question. And yup, I do know that AMOLEDs give you those pitch black blacks, which is good for battery, since those pixels aren't being used. I myself, am a big flashaholic, tried at least 5-6 Roms and a bunch of kernels.. Best battery life so far for me seems to be Slim + Franco.. Never tried BrokenOS, will flash tonight Thx a lot for your detailed response :good:

ccoulterjg1 said:
I hate the "it all depends on your phone, each one is different" bullcrap. That may be true to an extent, but some combos are generally going to be better than others. Besides, most people who ask this question just want to know what people are using and what is working for these people. So now that my rant is over, I'm using BrokenOS with Sensei Kernel R52. I'm getting roughly 4-5 hour SOT with roughly 50-60% brightness and 18 hours off the charger. I'm using the blacked out gapps that are linked with BrokenOS and using the black Swiftkey keyboard theme. All of the black saves battery when the screen is on because those pixels are off when using amoled screens. Don't know if you know that or not, but hey, it's there. Also, I've set the kernel minimum frequency to 223mhz using intelliplug with fsync and mpdecision off using the trickstermod app. I've set the scheduler to fiops and changed the read ahead value to 1024. This has consistently given me these results which I consider to be great! Hope that helps!
Click to expand...
Click to collapse
Each phone is different but that really has nothing to do with battery life, except that maybe some CPU's can undervolt more. I'm not sure anyone has given this "bullcrap" answer you eluded to.

samdroid24 said:
That helps greatly! Yes, this question was more of a 'Which ROM/Kernel is the best for you' type of question. And yup, I do know that AMOLEDs give you those pitch black blacks, which is good for battery, since those pixels aren't being used. I myself, am a big flashaholic, tried at least 5-6 Roms and a bunch of kernels.. Best battery life so far for me seems to be Slim + Franco.. Never tried BrokenOS, will flash tonight Thx a lot for your detailed response :good:
Click to expand...
Click to collapse
Check out my rom chroma. Franco kernel is preloaded. Huge update coming very soon.
Sent from my Nexus 6 using Tapatalk

I've tried most of the roms and kernels and have always gone back to BlissPop and either Lean or Francos. BlissPop for the features and Lean/Franco for the battery life. I would consider myself a moderate to heavy user and get between 4 - 5 hours of sot, but more important to me, I start my day at 5am and shutdown around 10:30 - 11:00 pm and I generally have 35% - 40% or so left. Of course your milage may vary, I also greenify what I can, but I refuse to lose any features i use, why have a fantastic phone and cripple it. I generally don't change any of the kernels, except maybe set it to conservative, I've had issues in the past undervolting, but thats just me. For the slight battery savings I don't find it does that much. Again, my opinion.
Just take a nandroid of where you are and try some combinations. Give it a few days to settle in. Repeat until your happy with the combination.

zephiK said:
Check out my rom chroma. Franco kernel is preloaded. Huge update coming very soon.
Sent from my Nexus 6 using Tapatalk
Click to expand...
Click to collapse
Will most definitely flash Chroma... Looks like one of the best designed ROMs.. Will flash it either tonight or tomorrow morning... And your name seems familiar from the numerous pages I've went through on Franco's Kernel lol. Thx :laugh:

how many hour is stay on the stock ROM ?

Chroma with FK and vomer are poetry in motion. Use it and prosper.

using the rom that i use, and kernel, and the way i set up my cpu, i see between 5.5 and 7 hours sot. which rom and kernel? try them all out, find your best rom/kernel.

dan04103 said:
Chroma with FK and vomer are poetry in motion. Use it and prosper.
Click to expand...
Click to collapse
Glad you're enjoying the combination

zephiK said:
Glad you're enjoying the combination
Click to expand...
Click to collapse
Does Chroma have omniswitch? Cause that's a deal breaker

Just flashed Chroma... This ROM is buttery smooth
Sent from my Nexus 6 using XDA Free mobile app

I am on Terminus currently with Franco Kernel undervolted all frequencies @-50 which is 100% stable in my case. -75 crashes on games and/or benchmarks. My Snapdragon has a PVS 5 binning.

samdroid24 said:
Just flashed Chroma... This ROM is buttery smooth
Sent from my Nexus 6 using XDA Free mobile app
Click to expand...
Click to collapse
I'm glad you enjoy it. A new build was pushed out if you didn't get it, 01/24.
jiv101 said:
Does Chroma have omniswitch? Cause that's a deal breaker
Click to expand...
Click to collapse
Nope, I personally don't find the feature useful.
Sent from my Nexus 6 using Tapatalk

Right now I'm on validus ROM with Franco kernel. I only changed the max clock in Franco kernel down to 2.2ghz. Right now I'm at almost 36 hours on time and 4 hours and 40 minutes sot

zephiK said:
I'm glad you enjoy it. A new build was pushed out if you didn't get it, 01/24.
Sent from my Nexus 6 using Tapatalk
Click to expand...
Click to collapse
Yup, flashed the 1/24 build last night

[Q] Do any TouchWiz ROMs (i.e. FireKat) really speed up the phone?

I have a new T-Mobile Note 4 (that I'm using on AT&T) and the phone is quite fast, but I enjoy tweaking and am planning to root the phone for Xposed and a few other things, so I was also thinking about flashing a new ROM.
I also use GearVR so I need a compatible (TouchWiz?) ROM and was thinking about FireKat.
Does it really make that big of a difference?
I'm more concerned about performance than battery life, but of course battery life is important too.

Yes, it makes a huge difference.

To go into a bit more detail for ya, yes they do help. Most of the custom roms have been de-bloated and tweaked for "power users" for lack of a better term. They have been adjusted to allow better usability and eliminate some of the useless features. Some devs (not all, be sure to do your research and read the boards) but extra effort into making their roms perform better and allow customization. Be warned though, from my experience, with more customizations and tweaks to appearance you will take a hit to performance.

Thanks very much for the help.
It seems like a lot of ROMs are tweaked for battery life and I often wonder if the performance isn't that good as a result.

sofakng said:
Thanks very much for the help.
It seems like a lot of ROMs are tweaked for battery life and I often wonder if the performance isn't that good as a result.
Click to expand...
Click to collapse
FireKat is tweaked for both performance and battery life. My phone is 10 times faster than stock with FireKat V9 and the good battery life is a nice side effect. Make sure your follow the instructions in the first and second posts for maximum performance/battery life.

Maybe everyone can submit performance benchmarks here.

how about this, I used Nova Launcher when im not rooted but when I am rooted (like now running firekat) im on TW all the way.

Don't go by benchmarks, go by feel. Like someone said above read through the different Dev posts and in most, people have done what your talking about and posted numbers. To the original poster, FireKat is awesome. Mega does an incredible job and its definitely worth trying his efforts if you don't mind flashing. The speed difference as well as battery performance is nothing short of incredible on this device. I've tried many different ROMs and always come back to this one.
Of course your experience may vary, but that's what's so awesome is the ability to try a different ROM. Like you, I have a TMobile Note 4 on AT&T. Fortunately for us there are many talented devs for this phone which gives us many options. Give them a try and see for yourself, and trust me, you won't be disappointed.
Just do yourself a favor and don't go by benchmark numbers, and go by what you feel is the fastest and smoothest. Numbers are artificial and change so often that it's much better in my opinion to feel for yourself.
Good luck and enjoy the device man, it's awesome.

I am a power user. I have a gear vr. None of the custom ROMs support vr. I have a backup nandroid of stock ROM, whenever I want to use vr, I nandrood back to it. Daily driver is cm12.

This is my benchmark score anyway.
http://imgur.com/aMxJEac
Touch above 50k using the latest cm12 build.
This is the smoothest running ROM I've used.
Most stable is firekat for sure.

Ugh. Gear VR doesn't work on FireKat?
I've been reading the thread and it says that it would work with a custom kernel. Has anybody tried that?

yes, it's my favorite ROM so far.

lamuertex said:
This is my benchmark score anyway.
http://imgur.com/aMxJEac
Touch above 50k using the latest cm12 build.
This is the smoothest running ROM I've used.
Most stable is firekat for sure.
Click to expand...
Click to collapse
I checked ur screen shot, how are you getting lte? is there a fix on cm12?

michwolverines00 said:
I checked ur screen shot, how are you getting lte? is there a fix on cm12?
Click to expand...
Click to collapse
I haven't had connectivity issues like some may be experiencing.

sofakng said:
I have a new T-Mobile Note 4 (that I'm using on AT&T) and the phone is quite fast, but I enjoy tweaking and am planning to root the phone for Xposed and a few other things, so I was also thinking about flashing a new ROM.
I also use GearVR so I need a compatible (TouchWiz?) ROM and was thinking about FireKat.
Does it really make that big of a difference?
I'm more concerned about performance than battery life, but of course battery life is important too.
Click to expand...
Click to collapse
If you want to speed up the appearance of your phone...make it snappier....go into Developer settings and reduce all animations to 0.5 or turn them off completely. It makes a big difference.

Firekat + AEL kernal = ROM bliss with VR function.

Face_Plant said:
FireKat is tweaked for both performance and battery life. My phone is 10 times faster than stock with FireKat V9 and the good battery life is a nice side effect. Make sure your follow the instructions in the first and second posts for maximum performance/battery life.
Click to expand...
Click to collapse
Really ten times? Not even close to twice as fast, maybe half as fast. While Firekat and Dynamic Rom are faster than stock touchwiz......Slim roms or Cyanogenmod are the only thing that REALLY speed up the phone. Touchwiz will always be touchwiz

It's more of a speed upgrade than that. Mega has been tweaking the speed for 9 versions. He's got skills.

Do any of the ROMs speed up gaming at all?
For example, I also have an iPhone 6 Plus and several games are silky smooth on it (Galaxy On Fire 2 HD, Terraria, Shadowgun), but on the Note 4 the performance is much lower. It's not horrible, but it's nowhere near as smooth as iOS. (note: this isn't meant to disrespect Android or the Note 4, but I'm honestly wondering about the difference because I have both phones and compare them side-by-side)

I think what you may really be looking for is a custom kernel. A lot of them are in original android development. I can link you to others.
I'm testing hyperdrive rom today on this phone, however and just downloaded those games. Very zippy.
http://forum.xda-developers.com/showthread.php?t=2919441
We'll pretend you didn't just admit you have an iPhone.

[Q] Recommended ROM, Kernel, governor, etc

Hey all. Which ROM, kernel, and governor do you recommend I use on my N6? There are so many options that I figured I'd ask. Currently running Benzo ROM and the kernel it came with. Thanks!

"Best" ROM.
There is no such thing as a best ROM.* The question itself is ambiguous.* "Best" is obviously a subjective term.
What I want from a ROM may well differ from what you want from a ROM, ergo - what is best for me could be worst for you.
If you are asking what the most popular ROMs are, or which ROMs people are using, you can see which threads stay around on the first few pages (and have the most posts) in the Android Development or Original Android Development forums. You can also see what other people are running by reading the What are YOU running on your Nexus 6??? thread.
If you are asking which is the most stable, being a Nexus device - they're all pretty stable.
If you are asking which is best on Battery, ROMs only affect battery if they have a feature that is badly coded.* You will likely be able to read about this in the ROM threads.* ROMs do not impact battery life.* The only impact to battery life are your apps, your settings, how you use the phone and mostly, environmental issues such as Phone Signal.
For tips about improving battery life, please read [Battery Life Help] Troubleshoot battery issues here!
"Best" Kernel
There is no such thing as the "Best" kernel.* What we all want from a kernel is different. Again, many people have the misconception that Kernels affect battery life.* Let's get this cleared up.* Although Kernel devs will build in optimisations and efficiencies that will improve battery life, these are very, VERY tiny...and if 1 kernel has these optimisations, they likely all have.
People will often say "Kernel x is better than kernel y for battery life".* This is actually wrong.* Kernels respond to user settings. Setting up the governor to favour either battery life or performance is simple enough to do, you just have to do some learning.* The reason people think Kernel x is better than y is because developers set their kernels up with their preferred governor settings.* This is what we refer to as out-of-the-box settings.* The out-of-the-box settings for kernel x may well produce better battery results than the out-of-the-box settings for kernel y, which favour performance.* The fact is, you as the user have the ability to tune kernel x or y to perform the same, be that battery or performance - so start learning how to do this yourselves - that way, you can choose the kernel based on the FEATURES you want, and not the fictional performance benefits of one kernel over another.
Hope this helps

rootSU said:
"Best" ROM.
There is no such thing as a best ROM.* The question itself is ambiguous.* "Best" is obviously a subjective term.
What I want from a ROM may well differ from what you want from a ROM, ergo - what is best for me could be worst for you.
If you are asking what the most popular ROMs are, or which ROMs people are using, you can see which threads stay around on the first few pages (and have the most posts) in the Android Development or Original Android Development forums. You can also see what other people are running by reading the What are YOU running on your Nexus 6??? thread.
If you are asking which is the most stable, being a Nexus device - they're all pretty stable.
If you are asking which is best on Battery, ROMs only affect battery if they have a feature that is badly coded.* You will likely be able to read about this in the ROM threads.* ROMs do not impact battery life.* The only impact to battery life are your apps, your settings, how you use the phone and mostly, environmental issues such as Phone Signal.
For tips about improving battery life, please read [Battery Life Help] Troubleshoot battery issues here!
"Best" Kernel
There is no such thing as the "Best" kernel.* What we all want from a kernel is different. Again, many people have the misconception that Kernels affect battery life.* Let's get this cleared up.* Although Kernel devs will build in optimisations and efficiencies that will improve battery life, these are very, VERY tiny...and if 1 kernel has these optimisations, they likely all have.
People will often say "Kernel x is better than kernel y for battery life".* This is actually wrong.* Kernels respond to user settings. Setting up the governor to favour either battery life or performance is simple enough to do, you just have to do some learning.* The reason people think Kernel x is better than y is because developers set their kernels up with their preferred governor settings.* This is what we refer to as out-of-the-box settings.* The out-of-the-box settings for kernel x may well produce better battery results than the out-of-the-box settings for kernel y, which favour performance.* The fact is, you as the user have the ability to tune kernel x or y to perform the same, be that battery or performance - so start learning how to do this yourselves - that way, you can choose the kernel based on the FEATURES you want, and not the fictional performance benefits of one kernel over another.
Hope this helps
Click to expand...
Click to collapse
this. and its very well said at that.

Thanks for the reply root.... However, nowhere did I ask what the "best" ROM is, I totally disagree that the stability will be equivalent because there are AOSP ROMs out there that are all in alpha for 5.1, as well as stock ROMs that may have certain rather experimental things, with nightlies being released. I guess the goal of my query was to find out what people have set some of their variables to (ROM, settings, kernel, kernel settings) to get better battery life with minimal performance drop.

YevOmega said:
nowhere did I ask what the "best" ROM is
Click to expand...
Click to collapse
Its my generic answer. Copy and paste. But you asked for recommendations and that gets the same answer because other than semantics, there's no difference in the question.
YevOmega said:
I totally disagree that the stability will be equivalent because there are AOSP ROMs out there that are all in alpha for 5.1, as well as stock ROMs that may have certain rather experimental things, with nightlies being released
Click to expand...
Click to collapse
That's you're prerogative but I'm not really talking about feature sets. That aspect of the answer is more generic, usually for people coming from HTC or Samsung where "camera sux" because the binaries were never released.
YevOmega said:
I guess the goal of my query was to find out what people have set some of their variables to (ROM, settings, kernel, kernel settings) to get better battery life with minimal performance drop.
Click to expand...
Click to collapse
Performance uses power, which uses battery. There is no way to get more battery life back than the amount of performance you're willing to sacrifice. Its a direct correlation.
I can tell you my settings, but they're not magic. Everything I gain in battery life, I lose in performance.
Edit. I think a good thing to do would be to pick a kernel based on features, then speak to users of that kernel to see how they set it up

@YevOmega, please check post #5 of the stickied Q&A thread for details on this question.
Sent from my Nexus 6 using Tapatalk

YevOmega said:
Hey all. Which ROM, kernel, and governor do you recommend I use on my N6? There are so many options that I figured I'd ask. Currently running Benzo ROM and the kernel it came with. Thanks!
Click to expand...
Click to collapse
The answer depends on how many ROM/kernel/governor combinations there, because that is how many answers you are likely to get. Stock based are usually the most stable, and everything is likely to work the way its's supposed to while CM/AOSP ROMs will have more cusomization and tweaks but are often troubled by instability or things that are broken. Me, I'm on Stock rooted 5.1 for now, until I flash something else. What is it that's important to you when it comes to the ROM?

I want it to be crisp most importantly, but it's nice to have things like PIE. Minimal bloatware, because yes there are still some system apps that I don't want but can't uninstall without jumping through hoops.

rootSU said:
Its my generic answer. Copy and paste. But you asked for recommendations and that gets the same answer because other than semantics, there's no difference in the question.
That's you're prerogative but I'm not really talking about feature sets. That aspect of the answer is more generic, usually for people coming from HTC or Samsung where "camera sux" because the binaries were never released.
Performance uses power, which uses battery. There is no way to get more battery life back than the amount of performance you're willing to sacrifice. Its a direct correlation.
I can tell you my settings, but they're not magic. Everything I gain in battery life, I lose in performance.
Edit. I think a good thing to do would be to pick a kernel based on features, then speak to users of that kernel to see how they set it up
Click to expand...
Click to collapse
Again, please read my statement. I understand that I can't just get better battery life out of thin air. I said minimal performance loss, not none. There is a variety of optimizations and my hope is that there are combinations that will improve my battery life without compromising performance too much.

YevOmega said:
Again, please read my statement. I understand that I can't just get better battery life out of thin air. I said minimal performance loss, not none. There is a variety of optimizations and my hope is that there are combinations that will improve my battery life without compromising performance too much.
Click to expand...
Click to collapse
You've misinterpreted what I've said. There is no minimal. Its loss or its not. Its an direct correlation. If you want to save x battery you must sacrifice y performance. There's no magic, smaller z performance that still gets you x battery.
I didn't say you wanted to get battery out of thin air (perhaps you need to read my statement). I'm saying you want to get battery out of medium air, but I'm telling you that it only comes out of thick air.
Let me try something else.
To increase battery by 6, you must decrease performance by 6. There is no magic setting that will allow you to get 6 battery out of 3 performance. If you only want to sacrifice 3 performance, you'll only get 3 battery.
Break it down. What uses battery most?
-Screen
-Radio
-CPU
So forgetting screen and radio which are out of the scope of this thread, let's look at CPU.
CPU voltage is controlled by the kernel. The kernel has a table that has a predetermined amount of voltage for every clock cycle step. As you can see here.
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So how you save power on CPU is to either prevent certain CPU frequency being used, limit the time it is being used for or try to not need that frequency. This will save 6 battery, but will lose 6 performance because in each case that battery is being saved, the CPU frequency is not being used. Its a relative battery to performance ratio.
So I can list all the kernel settings that will save you battery, but they all have an equal performance hit - which is what I'm trying to explain.

Alright thanks. Go for it. I have vindicator kernel, as a reminder, so if you don't mind listing some settings, that would be nice ?. Thanks!

YevOmega said:
Alright thanks. Go for it. I have vindicator kernel, as a reminder, so if you don't mind listing some settings, that would be nice ?. Thanks!
Click to expand...
Click to collapse
I use elementalx, but here's some things I like to do.
1 set up threshold higher (99) CPU ramps up at 99% load
2 hot plugging set to 2 cores offline when not in use
3 turn off all touch boosts

rootSU said:
I use elementalx, but here's some things I like to do.
1 set up threshold higher (99) CPU ramps up at 99% load
2 hot plugging set to 2 cores offline when not in use
3 turn off all touch boosts
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How much SOT do you get, and what carrier are you on?

YevOmega said:
How much SOT do you get, and what carrier are you on?
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It depends. At home, I can get 6 or maybe 7. On a work day, perhaps 4 or rarely 5.
I live in the UK so not sure the Carrier matters.

YevOmega said:
How much SOT do you get, and what carrier are you on?
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rootSU said:
It depends. At home, I can get 6 or maybe 7. On a work day, perhaps 4 or rarely 5.
I live in the UK so not sure the Carrier matters.
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Carrier only matters if you are comparing signal strength in regards to the same bands. Kernels can also allow you to undervolt if you forgot, there are other things we can do such as drop voltage on certain parts of the device, though this can cause instability.
Optimizations on ROM and kernel side can reduce the overhead on the CPU and we can also increase throughput on several aspects of the device such as memory and BUS. Other things that "may" increase battery life could be removing code for rotational storage and using flash based alternatives/optimizing it for non-rotational storage.

Thanks. And yeah, I know why carrier matters

[Q] How can i compare kernels?

Hello,
So im willing to try some kernels for my Nexus to see whats the best for my needs.
I want to compare the stock kernel to the leankernel, franco kernel and the ElementalX kernel.
Comperasion criterias:
1. Faster booting
2. Fastest performence as possible without hurting battery life in comparison to the stock kernel.
3. Better battery life as possible without hurting performence in comparison to the stock kernel.
So how can i compare those kernels? should i just flash each kernel and use AnTuTu Benchmark and Better Battery Stats on each one of them?
Choosing the best kernel for me is to give a try for each one and see for myslef - i know that. But i want to see the stats in front of me to reasure im picking the best one and also beacuse iv'e used the chroma and euphoria roms which use leankernel and franco kernel but im not sure the difference is noticeable by eye.
Also, feel free to share your current kernel and opinion about it

torecdude said:
Hello,
So im willing to try some kernels for my Nexus to see whats the best for my needs.
I want to compare the stock kernel to the leankernel, franco kernel and the ElementalX kernel.
Comperasion criterias:
1. Faster booting
2. Fastest performence as possible without hurting battery life in comparison to the stock kernel.
3. Better battery life as possible without hurting performence in comparison to the stock kernel.
So how can i compare those kernels? should i just flash each kernel and use AnTuTu Benchmark and Better Battery Stats on each one of them?
Choosing the best kernel for me is to give a try for each one and see for myslef - i know that. But i want to see the stats in front of me to reasure im picking the best one and also beacuse iv'e used the chroma and euphoria roms which use leankernel and franco kernel but im not sure the difference is noticeable by eye.
Also, feel free to share your current kernel and opinion about it
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1. Stop watch
2 & 3: Not really possible. To give to performance, takes from battery and vice versa. You give 1 to performance, you take 1 from battery. There are no magic settings that allow you to give 1 to performance and only take 0.5 from battery.
I hope the attached image helps to explain that

There are also other things to factor like the governor, scheduling, hot plug support , etc.
For example elementalX has its own Governor and I'm not sure it will even default itself to be used. You will need some type of kernel configuration tool to enable it .
There is also how YOU are using your phone. Just too many variables to consider
Sent from my Benzo'd Google N6 on VZ

DebianDog said:
There are also other things to factor like the governor, scheduling, hot plug support , etc.
For example elementalX has its own Governor and I'm not sure it will even default itself to be used. You will need some type of kernel configuration tool to enable it .
There is also how YOU are using your phone. Just too many variables to consider
Sent from my Benzo'd Google N6 on VZ
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Yeah for sure.
I always say that because kernel x performs more than kernel y out-of-the-box, it doesn't mean you can't set kernel y up to perform like x... It's just a trade off whichever way you go.
My personal advice is find a kernel that has the features you want, then configure the governor with the bias you want to see. I always go for Elementalx. @flar2 sets the best balance of battery and performance in my opinion, though I always alter my settings to suit my needs anyway

Rom / Kernel Combo

Hello everyone.
I am looking for the best fit for me as far as a rom / kernel combo. I have had the phone a week and was on stock for a day. Battery life was decent but i was looking for more longevity out of the device. I then flashed Dirty Unicorns and love the battery life but not all the theming and black. Is there something stock like with very awesome battery life I can try out? I do like the stock look L / M. I like simple and clean looking with no extra apps. What is the best recommendation for me?
Thank you in advance.

"Best" ROM.
There is no such thing as a best ROM.* The question itself is ambiguous.* "Best" is obviously a subjective term.
What I want from a ROM may well differ from what you want from a ROM, ergo - what is best for me could be worst for you.
If you are asking what the most popular ROMs are, or which ROMs people are using, you can see which threads stay around on the first few pages (and have the most posts) in the Android Development or Original Android Development forums. You can also see what other people are running by reading the What are YOU running on your Nexus 6??? thread.
If you are asking which is the most stable, being a Nexus device - they're all pretty stable.
If you are asking which is best on Battery, ROMs only affect battery if they have a feature that is badly coded.* You will likely be able to read about this in the ROM threads.* ROMs do not impact battery life.* The only impact to battery life are your apps, your settings, how you use the phone and mostly, environmental issues such as Phone Signal.
For tips about improving battery life, please read [Battery Life Help] Troubleshoot battery issues here!
"Best" Kernel
There is no such thing as the "Best" kernel.* What we all want from a kernel is different. Again, many people have the misconception that Kernels affect battery life.* Let's get this cleared up.* Although Kernel devs will build in optimisations and efficiencies that will improve battery life, these are very, VERY tiny...and if 1 kernel has these optimisations, they likely all have.
People will often say "Kernel x is better than kernel y for battery life".* This is actually wrong.* Kernels respond to user settings. Setting up the governor to favour either battery life or performance is simple enough to do, you just have to do some learning.* The reason people think Kernel x is better than y is because developers set their kernels up with their preferred governor settings.* This is what we refer to as out-of-the-box settings.* The out-of-the-box settings for kernel x may well produce better battery results than the out-of-the-box settings for kernel y, which favour performance.* The fact is, you as the user have the ability to tune kernel x or y to perform the same, be that battery or performance - so start learning how to do this yourselves - that way, you can choose the kernel based on the FEATURES you want, and not the fictional performance benefits of one kernel over another.
There's no best combo either. Get the features you want and learn to tune the kernel to your desires
Hope this helps