Database Info

Battery discussion, No more heat, 2 days battery life, Same Performance

The Problem With The S4 That It Has More Cpu Then It Needs. It Doesnt Have To Use It Cpu Up To 1600 Mhz, But It Automatically Does,
It Works Perfectly At 2 Cores And 800 Mhz, No Difference, Only A Better Experience , Please Read On
Ok Guys, This Will Be The Battery Discussion Page For The S4, We Will Be Doing Kernel And Under Volting Test, And Ways To Save Battery,
We Will Post Battery Records Here, And Many Other Things, This Is How It Works
I Will Post Mine Tomorrow After Fully Charging
Must Be Fully Charged Till 5 Percent Charge Without Pluging In Cable In Between,
And You Must Use Your Device As You Would Everyday
Install Cpu Spy
This Is The Layout You Fill In For Your Post
ROM:
KERNEL:
CPU MIN:
CPU MAX:
CPU GOVERNOR:
CORES ONLINE:
CORES OFFLINE:
Click to expand...
Click to collapse
Information Of How You Used Your Phone During The Process
And Any Other Information Like The Apps You Have Installed, And The App You Use To Save Battery With, Or Your
App Alternatives For Better Battery Life
Attach Photos (screenshots) Of Your Battery Record, Stats, And On Screen Time Using The Stock App In The Settings
And Your Cpu Spy Page
"i For One Have 2 Cores Offline And Under Volted To 250-800 On Both Online Cores And Have The Ondemand Governor Activated, And I Havent Felt Performance Lost, Runs Temple Run And Subway Surfers Perfectly, And No Heat, Even If Im Charging With Wifi On And Im Downloading Something, Its Great

Seems to be a nice idea. But could you elaborate as on why the text is bold and you had to use capslock for 1/2 of it!?

@slind ok i fixed the post. i will be posting links to the posts who are great battery savers without loosing performance

So basically, we use an I9500 like an Ace or a Grand to get rid of heating and battery drains.. Andyou suggest that it won't result in performance loss. I'd suggest playing games that are more graphically intensive and not just Temple Run.. Try copying data from one memory card to another, or simply try running a Full HD Video. Also, check out web browsing or maybe multitasking, and you'll see where the performance dies out.
I think the fix should come in the upcoming releases of stock firmware by Samsung. By turning off a couple of cores, you're only going back a couple of years. I don't think I upgraded from the S3 to S4 for that reason.

cabloomi said:
The Problem With The S4 That It Has More Cpu Then It Needs. It Doesnt Have To Use It Cpu Up To 1600 Mhz, But It Automatically Does,
It Works Perfectly At 2 Cores And 800 Mhz, No Difference, Only A Better Experience , Please Read On
Ok Guys, This Will Be The Battery Discussion Page For The S4, We Will Be Doing Kernel And Under Volting Test, And Ways To Save Battery,
We Will Post Battery Records Here, And Many Other Things, This Is How It Works
I Will Post Mine Tomorrow After Fully Charging
Must Be Fully Charged Till 5 Percent Charge Without Pluging In Cable In Between,
And You Must Use Your Device As You Would Everyday
Install Cpu Spy
This Is The Layout You Fill In For Your Post
Information Of How You Used Your Phone During The Process
And Any Other Information Like The Apps You Have Installed, And The App You Use To Save Battery With, Or Your
App Alternatives For Better Battery Life
Attach Photos (screenshots) Of Your Battery Record, Stats, And On Screen Time Using The Stock App In The Settings
And Your Cpu Spy Page
"i For One Have 2 Cores Offline And Under Volted To 250-800 On Both Online Cores And Have The Ondemand Governor Activated, And I Havent Felt Performance Lost, Runs Temple Run And Subway Surfers Perfectly, And No Heat, Even If Im Charging With Wifi On And Im Downloading Something, Its Great
Click to expand...
Click to collapse
post some screenshots with your screen time.

@adyscorpius
everyone has there preferences and there needs in a phone. and there own settings. and this is a Battery discussion thread. we will be doing many performance and voltage mods, so everyone could choose the settings that suits them. now please dont post aggressive post like that, im not stupid. i know that my settings are very low.
but for my most played games and most used apps. it doesnt seem to effect my performance, so im comfortable with my settings

i had the phone for 2 weeks, happily showing off battery performance and then i asked myself again, why the heck i bought this phone in the first place? BECAUSE IT HAS REPLACABLE BATTERY!.. LOL.. how silly i am trying to squeeze that little drop of power out of the battery when I can double the battery just by getting another spare.
no need to turn off anything, no need to drop performance or screen brightness.. just pure enjoyment of the full potential without worrying battery problem.. just get a spare.

cabloomi said:
@adyscorpius
everyone has there preferences and there needs in a phone. and there own settings. and this is a Battery discussion thread. we will be doing many performance and voltage mods, so everyone could choose the settings that suits them. now please dont post aggressive post like that, im not stupid. i know that my settings are very low.
but for my most played games and most used apps. it doesnt seem to effect my performance, so im comfortable with my settings
Click to expand...
Click to collapse
I didn't mean to be aggresive and sorry if you felt like that. All I mean is, there is a limit to which you can undervolt/underclock your phone without losing the functionality or speed. While underclocking to 1.0 ghz or 1.2 ghz sounds kinda normal, going all the way down to 800 Mhz and that too only on two cores is like running Galaxy Ace Dual Core instead. Why would I want to spoil my S4 for it?
That is all that I meant. And the phone is normally shelling out a good day's use in normal usage. Why bother so much about battery really???

My S4 i9505 came with MDE ROM from the factory, apart from doing dirty flashes over dirty flashes, finally someone came up with a recovery which is working. So i've :
1. Formatted system , cache , dalvik
2. Loaded in Djembey's stock slim deodexed ME2 ROM.
3. Using PimpMyROM, did some moderately less aggressive tweaks.
4. Capped the Max frequency at 1674MHz. Interactive gov, Noop sched.
5. Fully charged and unplugged.
6. Fully on 3G . Gmail sync for calendars, contacts, mail, keep, notes. Moderately heavy on Gtalk and Whatsapp. Browsing news and websites.
Observed 4 hours screen time.
Almost 15 hours of total usage + standby (This doesn't mean much, screen time depicts usage time more)
The phone still feels warmer than S2, under operation.
I've yet to try faux kernel yet, but i doubt it would get much better than this. The physical limit i feel is on the CPU, HD AMOLEDs, and the modem itself under normal usage.
Feel free to comment.

Hi,
hope you may be able to help. I have been trying almost everthing to increase the music volume as the s4 does not drive my senheiser headphones as well I would like. Is it possible to increase the gain through a kernel mod somehow?

Wow you're really random. This thread isn't even remotely discussing about the issue you raised.
Try the omega ROM thread, see if the functionality list includes volume hack.
Sent from my GT-I9505 using xda app-developers app

How does one go about disabling two of the cores ? c:

What is the good Custom ROM and kernel for 5+ SOT?

I used default stock ROM (6.0.1), RR (7.1.1), CM 12.1 (5.1.1) with squid kernel but still my battery don't get even 3 hrs SOT with greenify also. I mostly use it for facebook and whatsapp only. I cant afford a new phone due to this. Plz help me. TIA.

SanRak said:
I used default stock ROM (6.0.1), RR (7.1.1), CM 12.1 (5.1.1) with squid kernel but still my battery don't get even 3 hrs SOT with greenify also. I mostly use it for facebook and whatsapp only. I cant afford a new phone due to this. Plz help me. TIA.
Click to expand...
Click to collapse
No rom will give you that much of a increase, stock is the best battery in general but there is no way any tweaking will increase that significantly.
Sounds like you need to replace the battery...

uninsall the fb app.........use fb on chrome............fb is the mother of all battery sucker apps

Crimsongrey said:
uninsall the fb app.........use fb on chrome............fb is the mother of all battery sucker apps
Click to expand...
Click to collapse
Facebook Lite, way better than on mobile browser.

acejavelin said:
Facebook Lite, way better than on mobile browser.
Click to expand...
Click to collapse
Completely wrong

Crimsongrey said:
Completely wrong
Click to expand...
Click to collapse
That maybe your opinion, but I disagree... Facebook Lite with it's built in Messenger is essentially a specially written browser, uses far less memory than Chrome, removes ads from videos (in general there are less ads throughout) plus you can still get push notifications. I have been using it for months.
If I am "completely wrong" give me some proof. In fact, although the regular Facebook is not the best, it is hardly "mother of all battery sucker apps". It is a space and data hog, but it doesn't use battery any more than REAL hogs like Snapchat, Netflix, Amazon Shopping, SoundCloud, or Outlook, in fact if you do some testing it has less effect on battery than you likely think (granted 2-3 years ago this was different, FB used to be one of the worst offenders).
Regardless, the OP was looking for an app to increase SOT... unless you can lower the battery usage of the display, you are not going to see increases in the magnitude the OP is looking for, from 3 hours to 5 hours, or a 66% increase in SOT. No app change or ROM is going to make a change even close to that.

Crimsongrey said:
Completely wrong
Click to expand...
Click to collapse
Comments like that are hardly useful (or credible).
If you feel the need to make comments, please make them constructive and with some substance.

http://www.huffingtonpost.in/entry/facebook-iphone-battery-life_us_56b8b6c5e4b08069c7a7fc54
(It could boost your Android’s battery by as much as 20 percent,)
https://www.androidcentral.com/it-turns-out-uninstalling-facebook-android-pretty-great
(android central)
https://www.theguardian.com/technol...alling-facebook-app-saves-iphone-battery-life
https://www.reddit.com/r/Android/co...eeds_up_your_android/?st=j5c24vbs&sh=4c9b128f
there are too many on the web........

I agree with @ace Sir Facebook lite is good option .... Now u also have an option of Messanger lite
And also Battery Usage/SOT completely depends on ur usage OP .:angel:

SanRak said:
I used default stock ROM (6.0.1), RR (7.1.1), CM 12.1 (5.1.1) with squid kernel but still my battery don't get even 3 hrs SOT with greenify also. I mostly use it for facebook and whatsapp only. I cant afford a new phone due to this. Plz help me. TIA.
Click to expand...
Click to collapse
3 hours SOT with greenify is a little off. you need to watch for wakelocks. better battery stats or wakelock detector can be useful to you. and also, if you have greenified the apps that you use the most, it will reopen those apps everytime you open the app, that could do more harm than good. you can try shallow hibernation, or just install naptime and tweak the doze parameters using GeraldRudi's method and quit greenify for some days just to see if this improves.
Then again, your battery could be the culprit, that's always a possibility
about ROM's, every ROM has it's merits, but Motorola really knows how to optimize their ROM, so for now, I think stock ROM gives the best battery life, even if that is marginally better than custom ROMs.
Kernels: Stock moto kernel is very efficient, but you might get a little bit more battery life with squid kernel, it has a great governor that relies on voting mechanism, plus it's just perfectly undervolted to get you some extra battery. probably a 15-20% difference than the stock one.

1) Use AOSP-CAF based ROM like Tesla.
2) Flash squid or Firekernel
3) Reduce the Max Freq to 1152Mhz and Min to 200Mhz
4) Use IntelliPlug Hotplug (Turn off Touch Boost and set Screen off frequency to 400Mhz)
5) Install Force Doze app and add Facebook, WhatsApp and other Battery consuming app to blacklist (Remember you will not get notifications from those app if screen is off).
6) Don't charge too quickly, always charge to 100% and plug when it discharged to below 10% (Recommended to charge at night).
It will improve your overall battery backup and somehow SOT.
At last i am totally agree with @acejavelin Facebook Lite app is made for low memory devices so it consume less memory and also less Battery. Also it's fast and have almost every features.

The real problem here is the device is going on 2, maybe 3 years old... the battery is at it's limit and will need to be changed to get really good SOTs.
My Moto G 2015 used to get 5+ hours SOT easy... not it's barely 3.5... and this is a backup device, it has NOTHING installed in it at all but it was used regularly for 18 months. The battery is just not what it used to be and if I am going to continue to use it as a alternate device I will need to replace the battery. Like it or not, these devices were not designed for more than 2 years of service.

nikhilpal2705 said:
1) Use AOSP-CAF based ROM like Tesla.
2) Flash squid or Firekernel
3) Reduce the Max Freq to 1152Mhz and Min to 200Mhz
4) Use IntelliPlug Hotplug (Turn off Touch Boost and set Screen off frequency to 400Mhz)
5) Install Force Doze app and add Facebook, WhatsApp and other Battery consuming app to blacklist (Remember you will not get notifications from those app if screen is off).
6) Don't charge too quickly, always charge to 100% and plug when it discharged to below 10% (Recommended to charge at night).
It will improve your overall battery backup and somehow SOT.
At last i am totally agree with @acejavelin Facebook Lite app is made for low memory devices so it consume less memory and also less Battery. Also it's fast and have almost every features.
Click to expand...
Click to collapse
downclocking the cpu is kind of redundant and saves less power than what it takes. the reason why for some users min-max is a battery saving governor. Besides, the performence hit is greater than the battery gained which is not at all more than 2% probably.
you should not fully charge your battery. you can, but the best practice is to charge upto 80%. And anything bellow 25% is not good.
the issue is either wakelock or dying battery, no tweak is going to save him if the underlying issue is not fixed, moreover, doze is the most sophisticated solution to save battery till now, downclocking, hotplugs these are pointless unless one's usage is known to us. I'd suggest to have doze editor if you must have a doze interface.

You can use aosp caf osprey by Ahmed hady...it will give 6 hrs plus sot from moderate to normal use..

Kernel Comparison

Hi XDA community!
I was doing research in to the current custom kernels available for our phone. Pretty much every kernel developer advertises their kernel as having improved performance and battery. One of the problems I found is that it is quite difficult to compare the performance and battery of kernels without trying it out for a week or so. I thought for the benefit of not only myself (who doesn't have time to test every kernel), but for the community that it would be helpful to have a thread that compares kernels.
Each post being a short comparison of at least 2 kernels should be sufficient. Performance, battery life, conditions (e.g. ROM, heavy user? non-gamer? etc. ) and special features (that set it apart)of a kernel would be good ways to compare them. Perhaps a quick rundown of your current kernel and why it suits your needs best could be good as well.
This is not a thread to tell me what you think the best kernel is. I believe that all custom kernels have their merit being somewhere on the balance between battery life and performance + a few features and suiting different people based on their needs.

Gonna reply to this thread I made a while ago after a bit of testing. I think it would be a good starting point for anyone who is indecisive with kernels.
Today I thought I'd compare 2 kernels that I've been using a fair bit recently. Both are based on S7 edge firmware, but have counterparts for S8 ROMs. The disclaimer is that I didn't have time to try every version of the kernels, nor will I promise that my experience will be the same as yours.
Tkkg1994's Superstock vs Farovitus' Notorious kernel
The competitors
Superstock kernel
Created by the famous developer of Superman, Superstock, Batman and Ironman ROMs.
Recommended by the developer himself over his other more modded kernel (Superkernel)
Stock Samsung values for CPU and GPU speed
Safety net green
Other performance/battery enhancements as laid out on his page https://forum.xda-developers.com/s7-edge/development/kernel-superstock-v1-3-5-t3453462 and below in the special features section.
Notorious kernel
Most popular custom kernel (by thread activity and likes)
Under clocked cores
Safety net green
Comes underclocked: Big: 312-1872 small: 234-1586
stock value for CPU speed
Plenty of performance and battery tweaks outlined in his page https://forum.xda-developers.com/s7...orious-kernel-tw-dqd1-g93xx-g93xxd-3-t3600711 and below in the special features section.
They both sound pretty good, but it's the real life performance that matters right?
Versions used
I've used super stock 2.7.1 and 2.9 (the versions that came with superman ROM 2.6 and 2.7 respectively). 2.9 will be the one discussed today. I have found the performance quite similar between the 2 versions however.
I've used Notorious 1.9.1
Kernel Mods (that I used)
Both were kept very close to how the developers intended
I changed the to IO scheduler on Superstock to Zen
And I changed the internal IO scheduler on Notorious to Row, external to maple
Both I used Westwood TCP congestion control.
Both I kept with the stock governor (interactive)
no undervolt for notorious kernel
Conditions - my ROM and usage pattern
Superman ROM 2.7 with Magisk root
Debloated
Black theme, wallpaper and ui etc.
clock widget xperia running
Force doze with significant motion detector disabled
Greenify privileged mode (pretty much all social messaging apps greenified)
Magisk module to doze google play services
I turned off pretty much all the advanced features: smart alert, smart stay, don't turn on when dark etc.
Auto brightness on.
BT always on (connecting to car and smartwatch)
Location always on
4g, volte and viLTE on
WiFi off (I got plenty of data)
Charged to ~75% at night every day
Use was moderate. Involved BT audio on 15 minute drive to and from work. Variable tasks being done on phone: calls, texting, messaging (whatsapp, messenger lite), looking up internet, occasional remote desktop. 8-9hr day at work. Some messaging, calls, texting at home but less than at work.
No games on phone - I have a busy job and I have a PC, PS4 and WiiU.
Performance
Superstock has very good performance. Absolutely no lags. UI feels smooth and fluid. I don't game however.
Notorious feels smooth and snappy despite being quite underclocked. Developer sped up the boot animation fps. Maybe it's in my head (and therefore insignificant if any), but possibly a bit slower to start apps. No lags however. Again, I don't game on the phone.
Battery
Superstock
Very good battery. A fair bit better than stock. I could lose between 1-4% overnight (6-9hr sleep). Never bothered measuring SOT but the phone lost on average ~20-25% per day moderate use as outlined above.
Notorious
Excellent battery. On my off days, I found that notorious enters deep sleep faster than superstock leading to less idle drain. It also seems to drain battery slower when screen on. Would lose 1-3% over a 6-9hr sleep. Average day would use up about 12-17% battery moderate use as outlined above.
Special features
Superstock is a plain kernel that just works out of the box. Not many modding opportunities - can adjust clock speed within the stock range. No voltage change. Can use the 3 basic governors. conservative, interactive (stock), on demand. Can change IO scheduler and TCP congestion algorithm. Only notable feature is the safety net green. A few services disabled according to the developer, but that is about it.
Notorious is very customisable with mtweaks many governors to choose from (I only bother using interactive). Under/overvolt and under/overclock avaliable for CPUs. Under/overvolt and under/overclock available for GPU. Boeffla kernel wake lock blockers. IO scheduler change, TCP algorithm change. I changed very few settings, but it is also commonly undervolted. On the thread, people liked to use bluactive, impulse and relaxed governors rather than interactive. With Notorious, I found that undervolting didnt really increase battery life much and gave me the increased paranoia of silent corruption/ instability. I change the TCP and IO so that it theoretically optimises my user experience. Realistically, I found no difference compared to stock and it was more for my obssesive compulsive side.
Verdict
For a non-gamer like me who uses the phone for calling, messaging, internet, video, music notorious provides more than adequate performance with greater battery savings than superstock.
Superstock I'd imagine to have much greater performance under a big load. It was subjectively more responsive and faster when doing my low power tasks.
At the end if the day both were much better than stock for me in terms of battery. I'd say that Superstock would be more for performance and Notorious would be more for battery saving. Any questions or comments, ask away!

Eggleston11 said:
Gonna reply to this thread I made a while ago after a bit of testing. I think it would be a good starting point for anyone who is indecisive with kernels.
Today I thought I'd compare 2 kernels that I've been using a fair bit recently. Both are based on S7 edge firmware, but have counterparts for S8 ROMs. The disclaimer is that I didn't have time to try every version of the kernels, nor will I promise that my experience will be the same as yours.
Tkkg1994's Superstock vs Farovitus' Notorious kernel
The competitors
Superstock kernel
Created by the famous developer of Superman, Superstock, Batman and Ironman ROMs.
Recommended by the developer himself over his other more modded kernel (Superkernel)
Stock Samsung values for CPU and GPU speed
Safety net green
Other performance/battery enhancements as laid out on his page https://forum.xda-developers.com/s7-edge/development/kernel-superstock-v1-3-5-t3453462 and below in the special features section.
Notorious kernel
Most popular custom kernel (by thread activity and likes)
Under clocked cores
Safety net green
Comes underclocked: Big: 312-1872 small: 234-1586
stock value for CPU speed
Plenty of performance and battery tweaks outlined in his page https://forum.xda-developers.com/s7...orious-kernel-tw-dqd1-g93xx-g93xxd-3-t3600711 and below in the special features section.
They both sound pretty good, but it's the real life performance that matters right?
Versions used
I've used super stock 2.7.1 and 2.9 (the versions that came with superman ROM 2.6 and 2.7 respectively). 2.9 will be the one discussed today. I have found the performance quite similar between the 2 versions however.
I've used Notorious 1.9.1
Kernel Mods (that I used)
Both were kept very close to how the developers intended
I changed the to IO scheduler on Superstock to Zen
And I changed the internal IO scheduler on Notorious to Row, external to maple
Both I used Westwood TCP congestion control.
Both I kept with the stock governor (interactive)
no undervolt for notorious kernel
Conditions - my ROM and usage pattern
Superman ROM 2.7 with Magisk root
Debloated
Black theme, wallpaper and ui etc.
clock widget xperia running
Force doze with significant motion detector disabled
Greenify privileged mode (pretty much all social messaging apps greenified)
Magisk module to doze google play services
I turned off pretty much all the advanced features: smart alert, smart stay, don't turn on when dark etc.
Auto brightness on.
BT always on (connecting to car and smartwatch)
Location always on
4g, volte and viLTE on
WiFi off (I got plenty of data)
Charged to ~75% at night every day
Use was moderate. Involved BT audio on 15 minute drive to and from work. Variable tasks being done on phone: calls, texting, messaging (whatsapp, messenger lite), looking up internet, occasional remote desktop. 8-9hr day at work. Some messaging, calls, texting at home but less than at work.
No games on phone - I have a busy job and I have a PC, PS4 and WiiU.
Performance
Superstock has very good performance. Absolutely no lags. UI feels smooth and fluid. I don't game however.
Notorious feels smooth and snappy despite being quite underclocked. Developer sped up the boot animation fps. Maybe it's in my head (and therefore insignificant if any), but possibly a bit slower to start apps. No lags however. Again, I don't game on the phone.
Battery
Superstock
Very good battery. A fair bit better than stock. I could lose between 1-4% overnight (6-9hr sleep). Never bothered measuring SOT but the phone lost on average ~20-25% per day moderate use as outlined above.
Notorious
Excellent battery. On my off days, I found that notorious enters deep sleep faster than superstock leading to less idle drain. It also seems to drain battery slower when screen on. Would lose 1-3% over a 6-9hr sleep. Average day would use up about 12-17% battery moderate use as outlined above.
Special features
Superstock is a plain kernel that just works out of the box. Not many modding opportunities - can adjust clock speed within the stock range. No voltage change. Can use the 3 basic governors. conservative, interactive (stock), on demand. Can change IO scheduler and TCP congestion algorithm. Only notable feature is the safety net green. A few services disabled according to the developer, but that is about it.
Notorious is very customisable with mtweaks many governors to choose from (I only bother using interactive). Under/overvolt and under/overclock avaliable for CPUs. Under/overvolt and under/overclock available for GPU. Boeffla kernel wake lock blockers. IO scheduler change, TCP algorithm change. I changed very few settings, but it is also commonly undervolted. On the thread, people liked to use bluactive, impulse and relaxed governors rather than interactive. With Notorious, I found that undervolting didnt really increase battery life much and gave me the increased paranoia of silent corruption/ instability. I change the TCP and IO so that it theoretically optimises my user experience. Realistically, I found no difference compared to stock and it was more for my obssesive compulsive side.
Verdict
For a non-gamer like me who uses the phone for calling, messaging, internet, video, music notorious provides more than adequate performance with greater battery savings than superstock.
Superstock I'd imagine to have much greater performance under a big load. It was subjectively more responsive and faster when doing my low power tasks.
At the end if the day both were much better than stock for me in terms of battery. I'd say that Superstock would be more for performance and Notorious would be more for battery saving. Any questions or comments, ask away!
Click to expand...
Click to collapse
Hello,
Thank you for the very detailed review. :good:
May I ask how did you flash the notorius kernel ?
Did you installed the Superman ROM and then reflash the kernel over it ?
Thank you. :fingers-crossed:

Tqhao94 said:
Hello,
Thank you for the very detailed review. :good:
May I ask how did you flash the notorius kernel ?
Did you installed the Superman ROM and then reflash the kernel over it ?
Thank you. :fingers-crossed:
Click to expand...
Click to collapse
Glad I'ts helping someone choose, cos I was very on and off abuot which one i wanted until i actually did the tests.
This is not the right forum to post this lol. This is meant to be about kernel reviews. The notorious kernel forum itself however isnt very clear.
It's just simply installing via twrp. dont forget to clear davlik/art cache after installation. Also, you need to flash root afterwards. I recommend you dont flash the root that the kernel comes with and to flash the root separately as there have been some bugs regarding that and also so that you can get the most up to date root.

Eggleston11 said:
Glad I'ts helping someone choose, cos I was very on and off abuot which one i wanted until i actually did the tests.
This is not the right forum to post this lol. This is meant to be about kernel reviews. The notorious kernel forum itself however isnt very clear.
It's just simply installing via twrp. dont forget to clear davlik/art cache after installation. Also, you need to flash root afterwards. I recommend you dont flash the root that the kernel comes with and to flash the root separately as there have been some bugs regarding that and also so that you can get the most up to date root.
Click to expand...
Click to collapse
That discussion was very helping but the question the i have is that i am a heavy gamer and most of my battery drain is caused due to games... which one would u suggest for better gaming battery life from the above mentioned?

Xial Xahab said:
That discussion was very helping but the question the i have is that i am a heavy gamer and most of my battery drain is caused due to games... which one would u suggest for better gaming battery life from the above mentioned?
Click to expand...
Click to collapse
Generally speaking this depends on the performance you need. If you can get your games to run sufficiently fast underclocked like on notorious, it will improve your battery life more just like it does in general. If it's too slow that way you'll have to see if super helps over stock. You could also try notorious and up the clock to more stock values but test out undervolting on it (as mentioned that does pose some risk) and see if your particular chip can be stable at a nice undervolt. Undervolting at high clocks can potentially save you a lot of battery life, but it depends on whether your chip is a "good" one or not.

Flandry said:
Generally speaking this depends on the performance you need. If you can get your games to run sufficiently fast underclocked like on notorious, it will improve your battery life more just like it does in general. If it's too slow that way you'll have to see if super helps over stock. You could also try notorious and up the clock to more stock values but test out undervolting on it (as mentioned that does pose some risk) and see if your particular chip can be stable at a nice undervolt. Undervolting at high clocks can potentially save you a lot of battery life, but it depends on whether your chip is a "good" one or not.
Click to expand...
Click to collapse
Yep agreed => try games out on notorious. if they can work well on low clock speed, then keep it. Trying speeds between stock and notorious can work if the games are too laggy. Stock values may be necessary depending on what games you are using.
Undervolt may also help to improve performance while at lower clock speeds a less heat generated. Less voltage does also theoretically mean less power used. I have found the difference in battery life and heat with underclock to be quite insignificant. People calculate it to be 2-5% less power used. Given notorious already uses less than 1% per hour on average use for me. It means i'll be saving at best 5% of 1% so 0.02% per hour. Not much power saved and not worth in my opinion given the side effects.

Eggleston11 said:
Undervolt may also help to improve performance while at lower clock speeds a less heat generated. Less voltage does also theoretically mean less power used. I have found the difference in battery life and heat with underclock to be quite insignificant. People calculate it to be 2-5% less power used. Given notorious already uses less than 1% per hour on average use for me. It means i'll be saving at best 5% of 1% so 0.02% per hour. Not much power saved and not worth in my opinion given the side effects.
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The key is to undervolt during gaming, not idle. Undervolt can give exponentially more power savings at high clock speed. I agree it's not going to help for low clock speed and isn't usually worth the risk to corruption. With my Nokia N900 (back when you actually had to milk out all the MHz you could just to get 3D games on a phone, or in my case MAMEing arcades i could greatly increase gaming time when i dropped the volts for the highest CPU frequencies.
I appreciate your careful review of the two kernels. I'm still trying to figure out the ROM jungle for my new S7 Edge. Are these kernel and ROMs you are talking about snapdragon compatible or it this thread purely in exynos territory?

Flandry said:
The key is to undervolt during gaming, not idle. Undervolt can give exponentially more power savings at high clock speed. I agree it's not going to help for low clock speed and isn't usually worth the risk to corruption. With my Nokia N900 (back when you actually had to milk out all the MHz you could just to get 3D games on a phone, or in my case MAMEing arcades i could greatly increase gaming time when i dropped the volts for the highest CPU frequencies.
I appreciate your careful review of the two kernels. I'm still trying to figure out the ROM jungle for my new S7 Edge. Are these kernel and ROMs you are talking about snapdragon compatible or it this thread purely in exynos territory?
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Agreed that the ~5% savings would translate to a greater amount of power saved during gaming in theory. I dont personally game on my phone, so your experience on this is better than mine haha.
I have the G935F. As far as I understand these kernels are for Exynos only. Good luck if you are searching for a good development scene with the snapdragon version. There are a few ROMs and Kernels i think. I have no idea about quality.

About kernels

What kernels are you guys using and why? I'm on stock but willing to try out some

https://forum.xda-developers.com/oneplus-6/help/kernel-t3847767
This thread might help you.....

Currently using blu spark kernel, shifted from EX.

Im on EX. Using the stune boost recommended on the second post of his thread along with top app boost set to 1 so it gets pushed to the big cluster. Ultimate smoothness and no stutters whatsoever. I think the battery drain might be higher with the topapp setting but it lasts me the day anyways so I don't care.
I used bluspark before as well. Provided me with the best battery results but I did get some hiccups with it.
Radioactive was also speedy like EX. Didn't test it long enough to compare to the finer detail but I figured if it behaves similarly I may as well stick with EX since I'm already familiar with the work since the M7 days.

spartan268 said:
Im on EX. Using the stune boost recommended on the second post of his thread along with top app boost set to 1 so it gets pushed to the big cluster. Ultimate smoothness and no stutters whatsoever. I think the battery drain might be higher with the topapp setting but it lasts me the day anyways so I don't care.
I used bluspark before as well. Provided me with the best battery results but I did get some hiccups with it.
Radioactive was also speedy like EX. Didn't test it long enough to compare to the finer detail but I figured if it behaves similarly I may as well stick with EX since I'm already familiar with the work since the M7 days.
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One of the perks of owning this phone it's the insane speed. I've tried Ex in the past, on the OPO mainly, to try to get some extra hours out of a worn out battery. I used to use blu on my N5 for the same reason, I remember enjoying it.
I'm wondering why would someone tradeoff stock

quimbexa said:
One of the perks of owning this phone it's the insane speed. I've tried Ex in the past, on the OPO mainly, to try to get some extra hours out of a worn out battery. I used to use blu on my N5 for the same reason, I remember enjoying it.
I'm wondering why would someone tradeoff stock
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I am using EX kernel specifically because it supports WireGuard VPN kernel module, meaning the VPN connection to my home I have running 24/7 uses less battery and has higher throughput!
That, and the fact I have used EX kernel for many past devices, and the dev flar2 is really active with updates etc

[Discussion] Improving efficiency and battery life of the V20.

I've been using a V20 for several months now and I'm really enjoying the many features and flagship-grade hardware it offers. However, it has a lot of problems in terms of design. The V20 runs REALLY hot, and all that heat comes with an enormous power consumption (most figures for stock SOT, including my own, are around four hours.)
I've had a few ideas of my own for correcting LG's mistakes, and I'm wondering what all of your experiences are.
Underclocking the processor: The 820 is a fast, yet power-hungry and hot, processor. Underclocking it would trade off performance in favor of cooler phone and more battery life. Has anyone tried modifying the stock CPU governor or in any way messing with the clocks? I've experimented with LKT but didn't really notice any significant improvement.
Undervolting the processor: I'm not sure about how feasible this is on Android devices. Undervolting the processor would increase battery life and cool the phone at the expense of stability. Anyone find that the CPU is running at an necessarily high voltage?
Reducing Screen Resolution/Framerate: The V20 uses a 1440p display. With its screen size, most of the time this isn't necessary. Are there any tools to automatically reduce resolution when not playing back fullscreen 1440p content? Has anyone tried one, and what are the effects?
Aftermarket batteries: I've been using a 10500mAh extended battery. While it brings SOT up to usable levels, it's very heavy (and has over the course of a month or two decayed to only around 7Ah.) What's the general opinion on these?
Thermal pasting: Repasting or using at thermal pad has been a very common procedure for this device. For those who have done this, what kind of objective analysis of its effects can you providef?

waterlubber said:
I've been using a V20 for several months now and I'm really enjoying the many features and flagship-grade hardware it offers. However, it has a lot of problems in terms of design. The V20 runs REALLY hot, and all that heat comes with an enormous power consumption (most figures for stock SOT, including my own, are around four hours.)
I've had a few ideas of my own for correcting LG's mistakes, and I'm wondering what all of your experiences are.
Underclocking the processor: The 820 is a fast, yet power-hungry and hot, processor. Underclocking it would trade off performance in favor of cooler phone and more battery life. Has anyone tried modifying the stock CPU governor or in any way messing with the clocks? I've experimented with LKT but didn't really notice any significant improvement.
Undervolting the processor: I'm not sure about how feasible this is on Android devices. Undervolting the processor would increase battery life and cool the phone at the expense of stability. Anyone find that the CPU is running at an necessarily high voltage?
Reducing Screen Resolution/Framerate: The V20 uses a 1440p display. With its screen size, most of the time this isn't necessary. Are there any tools to automatically reduce resolution when not playing back fullscreen 1440p content? Has anyone tried one, and what are the effects?
Aftermarket batteries: I've been using a 10500mAh extended battery. While it brings SOT up to usable levels, it's very heavy (and has over the course of a month or two decayed to only around 7Ah.) What's the general opinion on these?
Thermal pasting: Repasting or using at thermal pad has been a very common procedure for this device. For those who have done this, what kind of objective analysis of its effects can you providef?
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You did not mention what variant, most of the issues you mentioned can be rectified by flashing a custom rom and kernel
Sent from my LG-H910 using XDA Labs

There is also the almighty...AKT (Advanced Kernel Tweaks Mod you can flash. Use the 820 selection.
Also thermal mods as well

Mysticblaze347 said:
There is also the almighty...AKT (Advanced Kernel Tweaks Mod you can flash. Use the 820 selection.
Also thermal mods as well
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Although LKT and AKT do have some advantages, they didn't give me much more Screen On Time - so I removed them. Have you gotten a significant more amount of SOT? If so, what settings?

baldybill said:
Although LKT and AKT do have some advantages, they didn't give me much more Screen On Time - so I removed them. Have you gotten a significant more amount of SOT? If so, what settings?
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I can get around 10hrs sot (depending) using Xana extreme battery. That's the one I'm currently on.
Have a 4200 mAh battery (reg size)
---------- Post added at 06:13 PM ---------- Previous post was at 06:12 PM ----------
It is hard to tell. Alot of placebo mods out there. I also put zram at zero and knocked my entropy to 2048 for write. I'm still learning and tweaking tho.

Going along with this, which is better: AKT or NFS-Injector?

I would propose that most custom ROMs are probably placebo when it comes to battery life. Very few mention changing anything related to CPU governor, resolution, etc. all of which are the main factors in power consumption (running in Doze 5% more of the time isn't going to affect SOT, for example, which is the only metric that really matters.)
It doesn't help that LG's display technology leaves much to be desired.

Guys, order a Perfine 4100mah battery in Ali....ess and be happy. Better than that 10000mah ugly fat battery cases. SoT about 7 hours. And if that's not enough for one whole day you are facing other problems lol..

Okay, most admit. Only wifi the whole day cause it's been a rainy day.

Jogg3r said:
Guys, order a Perfine 4100mah battery in Ali....ess and be happy. Better than that 10000mah ugly fat battery cases. SoT about 7 hours. And if that's not enough for one whole day you are facing other problems lol..
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Can you please share link of Battery in Ali Express

hemal_4404 said:
Can you please share link of Battery in Ali Express
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https://m.de.aliexpress.com/item/32...d=8252amp-7eN9wah34-yQOJzgwQJScw1558254753245

Advanced Interactive Governor guide for LG V20?
I have seen the "Advanced Interactive Governor" tweaks elsewhere on here for other phones, but it looks like some of it may be able to be used on the LG V20.
(Links to a few of them will be at the bottom for reference.)
I have calculated the frequencies for both CPU's on the T-Mobile variant, the H918, for both maximal efficient load, and minimal efficient load, according to the math in those articles. If anyone would like to try this on an LG V20 with me and help me work out specifics for this phone, it would probably speed up the process quite a bit, and I could share what I have so far.
https://forum.xda-developers.com/android/general/guide-advanced-interactive-governor-t3518881
https://forum.xda-developers.com/mate-10/how-to/guide-advanced-interactive-governor-t3718123
https://forum.xda-developers.com/nexus-5x/general/guide-advanced-interactive-governor-t3269557
https://forum.xda-developers.com/showthread.php?t=2769899

Jogg3r said:
Guys, order a Perfine 4100mah battery in Ali....ess and be happy. Better than that 10000mah ugly fat battery cases. SoT about 7 hours. And if that's not enough for one whole day you are facing other problems lol..
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Click to collapse
In that case: I am facing other problems.
For some reason this is currently getting me only about 2 hours SOT on a used V20 I just bought. Battery capacity seems good according to accubattery.