Database Users

Way to get battery battery life?

Hey guys, I'm sorry if there already are posts on this but yeah. My phone is only getting 12 hours max on faux 1.3 ghz and my rom is homebase 3.3 de-blur extreme
and i also have setcpu and I uv it and no widgets. But people are getting like 24 hours+ of heavy usage on their battery...What rom/kernel/uv settings are capable of getting that?

Atrixn00b said:
Hey guys, I'm sorry if there already are posts on this but yeah. My phone is only getting 12 hours max on faux 1.3 ghz and my rom is homebase 3.3 de-blur extreme
and i also have setcpu and I uv it and no widgets. But people are getting like 24 hours+ of heavy usage on their battery...What rom/kernel/uv settings are capable of getting that?
Click to expand...
Click to collapse
check the radio version u have. i used to have such issues with any ROM later i changed to N1.77p something radio and i have gained wonderful battery again .

If youre talking about baseband version that's what I'm on
Sent from my MB860 using XDA App

drop the oc kernel and replace with faux enhanced 2.0 1 ghz , setcpu only controls one core at the moment , faux has alittle more work to do on his kernal to get full control of 2nd core so it's not runing at 1300 and burning up battery power
homebase 3.4, update 5.4a , faux enhanced 2.0 1 ghz kernel . battery last for 2 days + 20% left
use setcpu , set up profiles, underclock the profiles
task manager, add most of the apps to auto end list

For me it helped to get rid of market, gmail app, set CPU profiles, alarms, auto syncing, Ebay, juice defender! Google apps seem to be worst offenders.

DavidNL said:
For me it helped to get rid of market, gmail app, set CPU profiles, alarms, auto syncing, Ebay, juice defender! Google apps seem to be worst offenders.
Click to expand...
Click to collapse
Bejesus.. Why not buy a Nokia 1110 then??
Sent from my Motorola Olympus using XDA Premium App.

Battery Life
I had the same problem recently, especially with Faux's 2.0 kernel @ 1.1ghz(1.9 had better battery life :/). Even with Juice Defender(the saint of batter life) I was only getting like 16 hours. My first suggestion is to use 1ghz for standard use, and to create a CPU profile which drops clock speed to 216mhz when screen is off. The difference between 1.1ghz and 1ghz with me was 80% after 12 hours compared to 30%. As I mentioned before, if you're rooted, get JuiceDefender. It has typically gets me 1.4x-1.5x the battery life. That is, even in you're sad case, 6 hours of extra life. Finally, kill Facebook and Browser when you're not using them, they seem to kill battery life.

I don't miss any of it. I check gmail manually via k9 mail , and I can thaw market if I need it. Right now I'm 14 hours with 42% batt.
Sent from my MB860 using XDA App

My battery only last like 4-6 hours with heavy internet + games + video use -.-
Alien Rom.

I'm getting horrible battery life on any deblurred roms. It seems that the integrated battery saver from blur greatly improves battery life.

Jtu89 said:
I'm getting horrible battery life on any deblurred roms. It seems that the integrated battery saver from blur greatly improves battery life.
Click to expand...
Click to collapse
How much are you using the phone? And how long does it last?

Im constantly texting, probably send and receive 400 a day? Im at 8000 and it has been a month lol. And im always on facebook to, I get 10 hours. And I live with a laggy phone that's usually at 216 even when im using it to prevent it from dying but it still does, im on faux 1.3ghz and I only overclock when I play nintendo64 , blur was horrible for me my phone would almost be dead by lunch and ill try juice defender. Is there a rom you guys would suggest to save battery? On days when in barely use my phone it still lasts only 12 hours. Thia is ridiculous lol
Sent from my MB860 using XDA App

200 texts*
Sent from my MB860 using XDA App

If you have twitter, do the tweet to get $2 free for the amazon appstore and set CPU is only $2.
It has helped me noticeably. It's not going to make it last an extra day, but a few extra hours makes the difference for me.
Sent from Atrix4G CM7 using XDA Premium App

Sounds like you need to re calibrate your battery, you should follow xploited's guide
http://forum.xda-developers.com/showthread.php?t=1198333
I used it and now I get PHENOMENAL battery life compared to what I had before

I got set cpu for free on a forum I flashed to hombase 3.3 version 2#2 and I wasn't getting reception after that :/ and yeah. Ill do that tutorial tonight

Atrixn00b said:
Im constantly texting, probably send and receive 400 a day? Im at 8000 and it has been a month lol. And im always on facebook to, I get 10 hours. And I live with a laggy phone that's usually at 216 even when im using it to prevent it from dying but it still does, im on faux 1.3ghz and I only overclock when I play nintendo64 , blur was horrible for me my phone would almost be dead by lunch and ill try juice defender. Is there a rom you guys would suggest to save battery? On days when in barely use my phone it still lasts only 12 hours. Thia is ridiculous lol
Sent from my MB860 using XDA App
Click to expand...
Click to collapse
Cyanogenmod 7 with faux's enhanced stock kernel for CM7. Make sure you have the correct radio and calibrate your battery, another member has already posted the link to that thread. I don't use juice defender or any other task killers or anything like that. Brightness turned to 20%, set CPU profile set to powersave, gps satellites disabled. I'm at 7 hours and 46 minutes with 86% left. This is with 124 texts sent, 1 five or so minute call and a couple pictures taken. If this set up doesn't work for you consider buying a new battery.

I don't know about that set-up that's what my phone is set at, I want a better battery life then 10 hours I wanna get like 16 hours if I can

Atrixn00b said:
I don't know about that set-up that's what my phone is set at, I want a better battery life then 10 hours I wanna get like 16 hours if I can
Click to expand...
Click to collapse
How many hrs screen time do you have in those 10 hours?

I think I had like..2 hours maybe last time? I installed alien 4 rom with blur and updated my kernel and bigot 12 hours today without installing setcpu and underclocking. So it was running at 1 ghz I guess the whole day and will oboes get 16 when I undervolt it maybe
Sent from my MB860 using XDA App

What is your sleep percentage after 5 minutes.

This purpose of this thread is so we can get into a discussion on how we can all improve our battery life. Please state the following.
On cpuspy do the following: reset timers, turn off the screen and then wait 5 minutes and turn on your screen and press refresh to get your results.
1. What Rom you are using? Me-Cyanogenmod 7 Nightly 10
2. With cpuspy what percentage of the time your phone is in sleep mode after 5 minutes of none usage. Me-94% of the time.
3. Tip and tricks on how you produced your results.
Me:
1. Killed 3g data.
2. I have no background data apps running.
3. Uninstalled google talk.
4. Froze unnecessary application in the background such as:
CMstats 1.0
google+
news and weather
Applications with auto updating I either manual pull my updates such as Facebook, have it refresh every hour my email with Maildroid. Friendster updates once a day, beautiful widget updates 2 times a day, etc.... in short find any application you suspect pulls data in intervals and make the intervals and update as little as possible or not at all. I hope this helps somebody out.
Data pulling is the biggest cause of battery drainage next to screen usage. Let's all try to improve our battery life.
Yes, this thread is a Question!

Cm7 and bushido8 kernel by earthbound.
93.12% 3g on and gmail on sync.
Sent From My Cyan Samurai

Biggoron said:
Cm7 and bushido8 kernel by earthbound.
93.12% 3g on and gmail on sync.
Sent From My Cyan Samurai
Click to expand...
Click to collapse
What are your settings and could you post a link to bushido8? The purpose of this thread is so we could help each other obtain better battery life. I like your setup especially with having 3g on.

http://forum.xda-developers.com/showthread.php?t=1342047
Here the kernel and my settings for i/o and governors is VR and Lagfree. Its 100/1000 and voltage I don't think matters.
I'm not to sure what you mean by setup details plz?
Sent From My Cyan Samurai

Another issue that causes increased battery drainage is, low signal, or weak signal strength, because the phone is always looking for the closest tower. How to modify that is the question.
Sent from my SPH-D700 using xda premium

Biggoron said:
http://forum.xda-developers.com/showthread.php?t=1342047
Here the kernel and my settings for i/o and governors is VR and Lagfree. Its 100/1000 and voltage I don't think matters.
I'm not to sure what you mean by setup details plz?
Sent From My Cyan Samurai
Click to expand...
Click to collapse
I only see bushido7 and not bushido8. So how did you get bushido8 I am not using 7 because it breaks the 4g wimax toggle.
What were some of the things you did to increase your battery life.
androidmaster1 said:
Another issue that causes increased battery drainage is, low signal, or weak signal strength, because the phone is always looking for the closest tower. How to modify that is the question.
Sent from my SPH-D700 using xda premium
Click to expand...
Click to collapse
Well you could use a program like Rom control or flash a different PRL. This will get you a better signal which will increase your battery life. There are thread showing how you can manually change your PRL.

jamice4u said:
I only see bushido7 and not bushido8. So how did you get bushido8 I am not using 7 because it breaks the 4g wimax toggle.
What were some of the things you did to increase your battery life.
Well you could use a program like Rom control or flash a different PRL. This will get you a better signal which will increase your battery life. There are thread showing how you can manually change your PRL.
Click to expand...
Click to collapse
Appologies misstype I have 7 whoops I don't have really any secrets all I do is shut the screen off not too many things I know of to save battery other than airplane mode :0
Sent From My Cyan Samurai

Biggoron said:
Appologies misstype I have 7 whoops I don't have really any secrets all I do is shut the screen off not too many things I know of to save battery other than airplane mode :0
Sent From My Cyan Samurai
Click to expand...
Click to collapse
I was confused for a moment Earthbound mentioned that it would be a week before next release and you got his next release the next day? Thanks for the clarification because I spent a good part of the morning trying to find release 8.
Sent from my SPH-D700 using xda premium

jamice4u said:
I was confused for a moment Earthbound mentioned that it would be a week before next release and you got his next release the next day? Thanks for the clarification because I spent a good part of the morning trying to find release 8.
Sent from my SPH-D700 using xda premium
Click to expand...
Click to collapse
Oh man I'm sorry my bad
Sent From My Cyan Samurai

CM7 RC0 no tweaks nothing frozen 94%
update sorry actually i do have stuff frozen like all the live wall paper, clock, dsp manager, latin input, market app installer, music, new n weather

96%
I didn't freeze any programs, I don't have any apps that auto sync, my signal is 1-2 bars wifi wasn't on, and my 3g was.
I'm running Legendary Rom RC 2.2 with the kernel thats supplied with their rom the Samurai gen 3.0.1
So far the roms pretty awesome. Oh and I have VC on Conservative. 14 hours on, display on 1hour 25 minutes, I have horrible coverage at work so 14% signal and 40% battery left.

wolvdog316 said:
96%
I didn't freeze any programs, I don't have any apps that auto sync, my signal is 1-2 bars wifi wasn't on, and my 3g was.
I'm running Legendary Rom RC 2.2 with the kernel thats supplied with their rom the Samurai gen 3.0.1
So far the roms pretty awesome. Oh and I have VC on Conservative. 14 hours on, display on 1hour 25 minutes, I have horrible coverage at work so 14% signal and 40% battery left.
Click to expand...
Click to collapse
I am running CM7 and using autostart from within Rom Toolbox Pro to turn off all the unnecessary data eating programs and I am getting 96% sleep time.

97% deep sleep in 5:07 mins. running miui rc 0.5 w/ shadow kernel 0.6+. used autostarts and rom toolbox to prevent just about everything from autostarting. 3g/wifi off. bluetooth on. cfq conservative in voltage control. 4 widgets on homescreen (news & weather, pure news, miui clock widget, minimalistic text widget). froze or uninstalled every app mentioned above that others freeze. uninstalled gtalk. have voodoo control, bluetooth, swype, swipepad, miui launcher, min text, and betterbatterystats running in background, as well as battery monitoring enabled in miui settings. the key to good battery i believe is autostarts/rom toolbox (including some sysctl tweaks thru rom toolbox, too) and undervolting (i undervolt -100 at each step)
im guessing the 2 seconds on 1000mhz is from turning the screen on

More than 5 minutes but oh well...
Sent from my SPH-D700 using Tapatalk

mine is 95% !

[ICS] We need your help... Battery life...

Since the beginning of Android one thing has always been an issue with some of the greatest ROMs.
........................Battery life.
Every day lives are drained away by the pleasures and features of such fantastic ROMs... and such things at time seem so hard to bare that we try to change the lives of our battery by going to a different ROM.
So now you have a chance to make a difference, nay, an opportunity to change the lives of many...
This thread is strictly for how to save Battery life. CM9/AOKP have amazing battery life by themselves (but yet can always be made better) But for those on MIUI (Not so great battery life) this will be really useful.
Understand that everyone's device is different and although you may get 15 hours off MIUI/AOKP/CM9 others may only get 4 from them.
Post what it is that helps you achieve maximum Battery life. You may be the one to solve the cure to wowhowdidmybatterylifedroptwentypercentinanhourosis.
Be sure to include:
1. ROM
2. Kernel
3. Tweaks that have been applied through ClockworkMod
4. Apps used to save life
5. What battery you use
6. How long your life lasts
7. Anything else that you think may help

Eclair
Just Eclair
Any Eclair
Shoot me......
But seriously, disabling 3g on ICS saves a ton of battery life.
Sent from my SPH-D700 using Tapatalk 2

marcusant said:
Eclair
Just Eclair
Any Eclair
Shoot me......
But seriously, disabling 3g on ICS saves a ton of battery life.
Sent from my SPH-D700 using Tapatalk 2
Click to expand...
Click to collapse
Uhhh,,,on ANY ROM...but not a practical solution.
I think the OP is looking for more practical solutions where they are not disabling major features of the smartphone.

kennysvgp08 said:
Be sure to include:
1. ROM
2. Kernel
3. Tweaks that have been applied through ClockworkMod
4. Apps used to save life
5. What battery you use
6. How long your life lasts
7. Anything else that you think may help
Click to expand...
Click to collapse
1. CM9, although i think aokp does better.
2. Samurai Kernel, although just about any other ICS kernel should help. The biggest thing that you can change between kernels is the Governor and I/O depending on these two will determine how the CPU runs and in effect will determine battery life. Conservative is just about the best for battery life. If you need slickness and not too worried about battery Ondemand. If you want the best of both worlds i Think Wheatly is a good compromise. Also I/O , Sio is "simple" but VR is flash based so it tends to be the best. Otherwise Noop/Deadline. Also voltage.. undervolting will help limit the amount of well voltage to the CPU. So the lower you can get it the better.
3. Dont have tweaks i apply through CWM but i Run the V6 Supercharger, 3G turbocharger(optional), and the Kick Ass Kernelizer from Zeppelin.
4. I cannot stress this enough, Apps that say they save battery... run... which uses RAM and Resources... meaning its running trying to save you battery, Using battery. Which is stupid... and useless.
5. I have two a 3500Mah and the stock 1.5 year old 1500mah.
6. Typically with 3 hours of display over a period of 15hours (1500 mah) and around 5 hours of display over a period of 22 hours (3500 mah). However this is on wifi, 3g would deduct these a pretty good amount if you have sucky speeds.

He needs to get over it... lol. The only thing that truly saves battery life is managing your connections. There is no magic bullet unfortunately.

PLEASE! Don't tell us to turn off data and never sync the phone. Obviously if you don't use the phone the battery will last forever. I need a phone that can do the following:
Receive emails and texts as they are sent. (I use exchange push)
Last 18 hours on a standard or 1800 mAh battery.
I can just barely make that with stock FC09, I'd love to run ICS but with either CM9 or AOKP I barely make 10 hours.

schnowdapowda said:
He needs to get over it... lol. The only thing that truly saves battery life is managing your connections. There is no magic bullet unfortunately.
Click to expand...
Click to collapse
Why must people post unhelpful comments such as the one above? I don't understand the logic there...
anyways since this was aimed at miui I get pretty good battery life with it... (3.5 hours screen on time) nyan v5 ftw! No special features... uv a lot (won't list my settings cuz every phone is different) and no oc... used to use jd but, it saves more battery if you just switch things off manually... really though until I flashed nyan my battery life was atrocious, but now just about on par with the peoples rom (4.5 to 5 hours screen on time!) Oh yeah, all this with the stock battery...

poit said:
PLEASE! Don't tell us to turn off data and never sync the phone. Obviously if you don't use the phone the battery will last forever. I need a phone that can do the following:
Receive emails and texts as they are sent. (I use exchange push)
Last 18 hours on a standard or 1800 mAh battery.
I can just barely make that with stock FC09, I'd love to run ICS but with either CM9 or AOKP I barely make 10 hours.
Click to expand...
Click to collapse
On aokp with 1800 mAh i can do about 3Hours of screen on time and 15 Hours of battery life and my phone was awake 75% of the time.
Screenie was at 15%
This was stock Everything Except ROM haha

XxLostSoulxX said:
On aokp with 1800 mAh i can do about 3Hours of screen on time and 15 Hours of battery life and my phone was awake 75% of the time.
Screenie was at 15%
This was stock Everything Except ROM haha
Click to expand...
Click to collapse
Think about if your screen was on while the device was awake..your time would be cut in half
Sent from my SPH-D700 using XDA

Oh my good golly gosh.
I just realized the best battery life I ever got was on DK28.
So take that. Let's go Frankenstein.
1. CM9 KANG June 02 build.
2. Stock
3. Services for V6 and Search Key Remap
4. Ha!
5. Stock. Came with device...need new one.
6. Depends on use. But I usually get the estimated six hours consistently.
7. If you're going to use a task killer just use the built in one. Overclocking is bad, and in my experience so is undervolting. GTalk, official Facebook application(especially this. Even with notifications off it still is always going), G+, and more are always running and are a drain. No live wallpapers, and no widgets that require constant updating. As much black as possible. Don't use third-party batteries. Obviously turning off 3G, 4G, sync, and such will dramatically increase your battery life.
WAIT! Why am I writing this? There is a freaking optimization guide. Why does this exist? For ****s sake.

Running AOKP build 36, stock, FC09 modem 15 hours running takes me down to 50% batt hour of screen time, constant crappy wifi connection in an area with crappy cell signal sync for everything but email and g chat is every 2 hours (weather and all that). Big thing to save batt for me was turning down my screen brightness. I was also getting crappy battery life till i let this rom install run the battery down to 5% twice.

flastnoles11 said:
Why must people post unhelpful comments such as the one above? I don't understand the logic there...
anyways since this was aimed at miui I get pretty good battery life with it... (3.5 hours screen on time) nyan v5 ftw! No special features... uv a lot (won't list my settings cuz every phone is different) and no oc... used to use jd but, it saves more battery if you just switch things off manually... really though until I flashed nyan my battery life was atrocious, but now just about on par with the peoples rom (4.5 to 5 hours screen on time!) Oh yeah, all this with the stock battery...
Click to expand...
Click to collapse
By no means was I saying never enable your 3g/4g.. but the fact remains that the single best way to conserve your battery life is to be smart about managing your connections. I.e. not leaving it on ALL day and to only turn sync on when your actually checking your e-mail.. be that through an app like juice defender or manually toggling. If that's not more helpful than what you posted (UV a lot and don't overclock??? Duh.) than my bad bro!

darkierawr said:
Oh my good golly gosh.
I just realized the best battery life I ever got was on DK28.
So take that. Let's go Frankenstein.
Click to expand...
Click to collapse
Something we can all get behind here... I remember I used to get 24+ hours on froyo w/o customs kernels. Le sigh..

ÜBER™ put's it pretty well.
ÜBER™ said:
1. CM9, although i think aokp does better.
Click to expand...
Click to collapse
-CM9 still seems cleaner, but AOKP seems better.
ÜBER™ said:
2. Samurai Kernel, although just about any other ICS kernel should help. The biggest thing that you can change between kernels is the Governor and I/O depending on these two will determine how the CPU runs and in effect will determine battery life. Conservative is just about the best for battery life. If you need slickness and not too worried about battery Ondemand. If you want the best of both worlds i Think Wheatly is a good compromise. Also I/O , Sio is "simple" but VR is flash based so it tends to be the best. Otherwise Noop/Deadline. Also voltage.. undervolting will help limit the amount of well voltage to the CPU. So the lower you can get it the better.
Click to expand...
Click to collapse
-Spot on.
ÜBER™ said:
3. Dont have tweaks i apply through CWM but i Run the V6 Supercharger, 3G turbocharger(optional), and the Kick Ass Kernelizer from Zeppelin.
Click to expand...
Click to collapse
-I don't use the supercharger, but I do apply the same oom ram mods. These help close unused apps when they exceed the applied limit. Based on my experience, it's kept apps under control.
ÜBER™ said:
4. I cannot stress this enough, Apps that say they save battery... run... which uses RAM and Resources... meaning its running trying to save you battery, Using battery. Which is stupid... and useless.
Click to expand...
Click to collapse
-THIS +9000! An app that spends all of it's time stopping other apps is wasting just as much "battery." I maintain, Advanced Task Killer, with NO, I repeat NO AUTOKILL. Set a widget on your home page, tap it occasionally to make sure everything is closed. Same effect as the built in task manager, but one single convenient tap.
ÜBER™ said:
5. I have two a 3500Mah and the stock 1.5 year old 1500mah.
Click to expand...
Click to collapse
-I use two stock 1500mah batteries and one 3500mah. My wife has the same. All are about 1.5 years old now.
ÜBER™ said:
6. Typically with 3 hours of display over a period of 15hours (1500 mah) and around 5 hours of display over a period of 22 hours (3500 mah). However this is on wifi, 3g would deduct these a pretty good amount if you have sucky speeds.
Click to expand...
Click to collapse
-These numbers are pretty much the same for me. I almost always average 3 hours display on the stock battery between games and internet. 5-6 hours on the 3500, but I'm pretty sure it's not reaaallly the 3500mah it claims to be... . I NEVER turn off wifi or 3G, but google autosync is off until I edit my contacts.

schnowdapowda said:
By no means was I saying never enable your 3g/4g.. but the fact remains that the single best way to conserve your battery life is to be smart about managing your connections. I.e. not leaving it on ALL day and to only turn sync on when your actually checking your e-mail.. be that through an app like juice defender or manually toggling. If that's not more helpful than what you posted (UV a lot and don't overclock??? Duh.) then my bad bro!
Click to expand...
Click to collapse
I don't turn off my connections at all and get great battery life... and seens how the op states don't say anything about disabling 3g or anything id say your comment was the least helpful on the thread... but at least you tried... don't get into a battle of witts with me, I'm afraid your unarmed...

flastnoles11 said:
I don't turn off my connections at all and get great battery life... and seens how the op states don't say anything about disabling 3g or anything id say your comment was the least helpful on the thread... but at least you tried... don't get into a battle of witts with me, I'm afraid your unarmed...
Click to expand...
Click to collapse
Firstly, I'm not trying to get into a pissing match with you. Its pointless. Secondly, the op makes no mention whatsoever of connection status. Thirdly, while you might get decent battery life w/o doing it.. I guarantee you'd do better if you did. Straight facts.
Edit: I am armed. With a small slide out keyboard.

Please follow the format specified by the OP. List the 7 items. Bickering in this thread will not be tolerated.
Thank you for your cooperation
Friendly Neighborhood Moderator
Sent from my PantechP4100 using xda premium

kennysvgp08 said:
Be sure to include:
1. ROM
2. Kernel
3. Tweaks that have been applied through ClockworkMod
4. Apps used to save life
5. What battery you use
6. How long your life lasts
7. Anything else that you think may help
Click to expand...
Click to collapse
1. CM9
2.ShadowKernel (I find nyan colonel to be a little more draining) SIO, conservative
3. None
4.System Tuner Pro configured to UV, under clock to 400mhz on screen off, to close apps that don't automatically restart themselves, configure "auto-kill" so its not as aggressive with killing apps that just stay on, and a few sysctrl edits that I honestly don't think make a difference.
5.stock epic 1500 mAh, my sprint store wouldn't give me an sgsII battery
6. 12-18 hrs depending on use, though it has definitely drained quicker
7.be easy on data! (There kennyG) turn off wifi when your not near your networks, turn off mobile data, Bluetooth, and autosync when your not needing it. (Unless you absolutely need PUSH email for your job or whatever though honestly as far as my job goes if its important enough for me to need the message immediately they will simply dial my phone number. Yeah I'm old fashioned.

- Cm9
- Shadow kernel
- No tweaks
-1800 D710 battery
- I get 15-20 hours depending on how much music I stream during the day.
- I got the biggest boost by using the profiles in CM9 to optimize my connections and syncing depending on where I'm at during the day. I have Wifi at work and home, so I have it toggle my data off during that time period and vice versa when I'm mobile.
Sent from my SPH-D700 using xda premium

Using AOKP with shadow kernel.
Best thing I did to help with battery life was to turn off all notification options in the FB app. And I set haxsync to download photos only when plugged in.
sent from a secret underground bunker

Best ROM for performance/ battery?

I dont care much about customization. I just want great perfomance and good battery life. It is really hard to choose a rom because all of them feel almost the same? Thanks

I use rasbeanjelly with trinity kernel currently at 71% with nine hours on and two hours fourteen minutes of screen time I've gotten two days with five hours screen time before and still had about 25% battery left. That's with wifi on off while tablet is asleep, location services on, and two email accounts on sync. I got some slightly better time on Franco's kernel but I had to disable location services to stop SoDs I read that a voltage bump might fix that. Making it worth another look. As always try around and see what works for you not all of these tablets are created equal.
Sent from my Nexus 7 using XDA Premium HD app

Stock ......
There is no best ROM choose one and stick with it or flash another.
Sent from my Galaxy Nexus

You have to try them out for yourself and decide.
I personally like SmoothROM with Clemsyn's Battery Saving kernel.
-Brought to you by Marino's Nexus 7-

I Am Marino said:
You have to try them out for yourself and decide.
I personally like SmoothROM with Clemsyn's Battery Saving kernel.
-Brought to you by Marino's Nexus 7-
Click to expand...
Click to collapse
Thx I love smoothrom!

Clemsyn's battery saving kernel is definitely the best for battery life imho.
Sent from my Nexus 7 using xda premium

Best Kernel for battery

Which ROM performs the best in terms of battery performance. If you are using any Governor and I/O setting please do mention them.

PA rom...Franco kernel...ondemand settings...

I'm also curious on what you guys experienced.
I'm currently testing Franco R15 with Stock JB on my Nexus 4. It's the first day and I'm running for 9 hours with 1h 46M of screen time.
So I'm expecting about 3h 30m of screen time.
Will give it a fews days and report back. Then I'll try out Matr1x.

Please use search next time because there are threads with the same exact title. No such thing as a best kernel. It is subjective such as if you were to ask the question, what is the best car for conserving gas usage.
Sent from my Nexus 4 using xda premium

My first cycle (settings on signature) gave me almost 4hs of screen time.
Trying second cycle today.

calanizzle said:
My first cycle (settings on signature) gave me almost 4hs of screen time.
Trying second cycle today.
Click to expand...
Click to collapse
your sig is wrong, unless you are running 4.1.2?

calanizzle said:
My first cycle (settings on signature) gave me almost 4hs of screen time.
Trying second cycle today.
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4.1.2????
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This is what I'm getting constantly and I'm running Stock everything/rooted... not sure if I would leave stock with these numbers I'm getting... Anyone getting better numbers with custom ROM/kernel
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fresh_TD said:
This is what I'm getting constantly and I'm running Stock everything/rooted... not sure if I would leave stock with these numbers I'm getting... Anyone getting better numbers with custom ROM/kernel
Sent from my Nexus 4 using xda premium
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That's really good. I'm getting 4 hours 45 min running Xylon 012 with Matr1x 3.0
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Jefferyrbrown1983 said:
That's really good. I'm getting 4 hours 45 min running Xylon 012 with Matr1x 3.0
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I'm going to give francos kernel a run to see if I can squeeze a little more out the battery
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I'm on Stock rooted using Franco's R15 kernel since a couple of days. Every charge cycle brings a slight improvement. Will test the kernel for a week and then flash Matrix's kernel and compare.

Thanks for letting us know.
Sent from a galaxy far far away.

Wish I had better battery life
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for best battery : CM10.1 + faux kernel (the last beta) + intellidemand + UV -150mv .
+5h00 screen on

fresh_TD said:
This is what I'm getting constantly and I'm running Stock everything/rooted... not sure if I would leave stock with these numbers I'm getting... Anyone getting better numbers with custom ROM/kernel
Sent from my Nexus 4 using xda premium
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So ~5 hours screen time. And you got 1.4 days on WiFi with hardly any awake time. That's not really a good measure of battery life.
I don't know about everyone else, but I find the Nexus 4 gets really good battery life. Maybe not as good as the GSIII or the H1X+, but those have tremendously aggressive power-saving features.
Using faux kernel with Snake Charmer (caps max freq on all 4 cores) and Eco Mode (only allows 2 cores to be simultaneously active) provides adequate performance with very good battery life; even better if you undervolt. You will definitely beat the GS3 or H1X+ with those faux kernel settings. I don't use Eco Mode, because my phone lasts nearly a day, and I can charge it mid-day. I should probably be more conservative so I won't have to replace the battery as soon, buttphuckit, I do what I want.

I've used faux, Franco, motley, and Matr1x a lot. As of now, the best battery with performance goes to Matr1x by Mathkid. Version 2.5 undervolts by 150, which my phone runs fine. However, a few people had instability because it was too low for their devices. Enter v3.0, which undervolts by 100 (and you can uv even more using System Tuner or perhaps Faux app). Either way, great battery life (I routinely get 5 hours screen time with 16 hours battery time, or 4 hours screen with 24 hours total, etc).
Absolute best battery life is probably faux with his battery optimized settings (1.35 max speed, snake charmer, eco mode, and some undervolt by 100 or so). It runs fairly well, but it's not as quick and smooth as stock because it sacrifices some of that for battery (fair trade off if you need it because it's still a damn fast phone). People have gotten 6 and even 7 hours screen time. Obviously this won't happen playing games but it's possible with light browsing and texting and whatnot.
Motley's kernel also gets good battery and excellent performance. Franco's kernel does too, but not quite as good of battery because it doesn't support undervolting YET. When it does, it might be the best battery for performance of all (likely).
I use Matr1x daily and am happy with it. Some people, even smart devs, will sometimes tell you undervolt battery gain is negligible. However, at least with this device, it can make a huge difference because it handles such a big undervolt while remaining stable. It also stays much cooler and will run at high clocks longer before reaching the thermal throttling limit.
Anyway, some people might disagree, but these are my experiences. Franco has a huge following and for good reasons. His kernels are awesome. I just don't think the battery life will compete until he adds undervolting. He has said this will come when he feels it is stable and good overall. I'll probably switch then unless Mathkid adds more features to his like gamma control, etc.
Hope this is helpful. Btw, another thing I really like about Matr1x kernel is that he uses the older touchscreen driver which increases screen sensitivity. Many people complain about the nexus 4 screen sensitivity, and if that applies to you, this will fix that.
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^^ A good write up, deserved its thanks. Am on latest rasbean & matr1x, never experienced smoothness & battery life like this. Screenshots at the Matr1x thread later today.
However, all users are different. Battery life WILL differ, that's the only certain thing.