Database Users

[Q] [Kernel Test]4.20.2011 Which has better battery life?

Hey folks,
I am giving two kernels out to test. Don't worry, both are quite stable. However, I am looking at some different settings to see which gives better battery life. So, in an effort to avoid any "placebo effect" results, I am not saying which settings these are just yet.
What I am looking for, if you folks could be so kind as to check:
Battery life between the two.
Performance between the two.
Neither of these kernels are overclocked.
Please test using the same governor between both, preferably Ondemand.
Thanks!!!
Kernel a
http://www.mediafire.com/file/p85vkw9a1329kb8/a.zip
Kernel b
http://www.mediafire.com/file/tbmpl1nlugyvgy3/b.zip

Will test and reply back at a later time
Sent from my ADR6400L using XDA Premium App

Awesome!
D

Ugh...you would drop this right when I just started doing a battery calibration.

Anybody test yet?
I am at work and can't till later.
D

I getting better battery life on a so far
Sent from my ADR6400L using XDA Premium App

I would love to help test, but I'd like to know if you have any good criteria for the testing. It's really hard to test something without any guidelines as maybe you end up using the phone more on one, or downloading or whatever, and both seem like 'moderate usage', but in reality they are quite different.
As a matter of fact, I'm having a hard time verifying the current draw on my phone, and knowing what is good or not good, in general.

Just use your phone as you normally would, for both.

Are these compatible with the new RRU?

nmyeti said:
Are these compatible with the new RRU?
Click to expand...
Click to collapse
Yes, any and all versions and ROMs.
D

Cool, I'll test both out for a day each and report back.

Kernel A has better battery life thus far here...

I get no 3G with A. That might be why battery life is better...B is fine.
jc

papi92 said:
I getting better battery life on a so far
Sent from my ADR6400L using XDA Premium App
Click to expand...
Click to collapse
cjmcmillion said:
Kernel A has better battery life thus far here...
Click to expand...
Click to collapse
How can you really tell how much better the battery life is in such a short amount of time to test?

This reminds me of a test that kmobs did back in the day for kernels on the nexus. Turned out that heavily undervolting the kernel has a negative impact on battery life. Where's jlevy at. I know he remembers.

cjmcmillion said:
Kernel A has better battery life thus far here...
Click to expand...
Click to collapse
Lol, that was quick. I'm thinking he wants testing to go a little more than 30 minutes with each.

I'll test out A for 12 hours and B for 12 hours, if you think that's suffiecent. That should get me through a full charge on each.

Should be sufficient.

THATTON said:
This reminds me of a test that kmobs did back in the day for kernels on the nexus. Turned out that heavily undervolting the kernel has a negative impact on battery life. Where's jlevy at. I know he remembers.
Click to expand...
Click to collapse
That's correct. Stock voltage for the Nexus One was 975mV. Kmobs found that undervolting below 950mV had negative impacts on battery life.

Do i have to clear battery data everytime i switch kernels?
Sent from my ADR6400L using XDA Premium App

Using CM7? You must read this.

Please delete this thread, wrong account was used to make the post.

raberry said:
Ok guys. I have to admit, I was about to give up on CM7 due to battery issues and what seemed to be memory leaks progressively making my phone lag more and more throughout the day. I have found something some of you may not be aware of and I wanted to share this amazingly helpful kernel with you.
Using x99, Scary, and stock kernels regardless of governor I seemed to maybe get 8 hours of battery life with moderate to heavy use. I am proud to say, using bcnice20's kernel I have had my phone on for 9 hours with 60% battery life today. This is incredible, even with lighter use on the other kernels I had NOWHERE near this amount of battery left.
Most of you may not have seen this kernel because it isn't posted. (as far as im aware) Let me help you out. First, go into your Market and download Kernel Manager. There is a lite version in there that is free. If you have an extra buck or two donate to the developer for making a neat app where you can download kernels in a convenient place by downloading the pro version.
What you will be downloading is called bcblend SIO tinyRCU kernel. I have not true VR tinyRCU kernel yet. Not sure what the differences are, if someone could elaborate that'd be appreciated.
Regardless, I find the sweet spot for this to be at 245MHz min and 1GHz max on Interactive governor to work really well. The phone does not seem to get laggier throughout the day and consistently performs well, snappy, and just way better than the other kernels. (No offense to x99 and Scary, I appreciate all you've done!)
Give it a try and let me know if you all have similar results! I have heard that AOSP gets less battery than Sense ROMs from people on this very forum, and this may be the kernel to put that little debate to rest.
Oh, and be sure you have the latest CM7. I am on 7.0.2.1 trying this out.
Click to expand...
Click to collapse
I have been using the x99 kernal and i have about 1 d and 12 hrs with about 45 % left.. I also have the calibrator apk from the market so it wipes the battery stat when im at 100%. and various other apps that deal with the speed of the sd card and what nots. So, me coming from the Hero is very happy with this phone...
Thank you for sharing your findings... THIS IS SO AWESOME !!!!!

That's amazing battery life. I can't seem to get that great of battery life on CM7 as compaired to stock sense roms. What calibration app are you talking about exactly? There are a few on the market.
Sent from my PG06100 using XDA App

Using CM7? You must read this! (Correct post)

Ok guys. I have to admit, I was about to give up on CM7 due to battery issues and what seemed to be memory leaks progressively making my phone lag more and more throughout the day. I have found something some of you may not be aware of and I wanted to share this amazingly helpful kernel with you.
Using x99, Scary, and stock kernels regardless of governor I seemed to maybe get 8 hours of battery life with moderate to heavy use. I am proud to say, using bcnice20's kernel I have had my phone on for 9 hours with 60% battery life today. This is incredible, even with lighter use on the other kernels I had NOWHERE near this amount of battery left.
Most of you may not have seen this kernel because it isn't posted. (as far as im aware) Let me help you out. First, go into your Market and download Kernel Manager. There is a lite version in there that is free. If you have an extra buck or two donate to the developer for making a neat app where you can download kernels in a convenient place by downloading the pro version.
What you will be downloading is called bcblend SIO tinyRCU kernel. I have not tried VR tinyRCU kernel yet. Not sure what the differences are, if someone could elaborate that'd be appreciated.
Regardless, I find the sweet spot for this to be at 245MHz min and 1GHz max on Interactive governor to work really well. The phone does not seem to get laggier throughout the day and consistently performs well, snappy, and just way better than the other kernels. (No offense to x99 and Scary, I appreciate all you've done!)
Give it a try and let me know if you all have similar results! I have heard that AOSP gets less battery than Sense ROMs from people on this very forum, and this may be the kernel to put that little debate to rest.
Oh, and be sure you have the latest CM7. I am on 7.0.2.1 trying this out.

Thanks ima try this out
Sent from my PG06100 using Tapatalk

+1
I've been flashing too much to test out battery life but bc's kernel is just like melted garlic butter smooth. At 768mhz max my Shift still hums along like it's OC'd
^ Shift Faced

jesusice said:
+1
I've been flashing too much to test out battery life but bc's kernel is just like melted garlic butter smooth. At 768mhz max my Shift still hums along like it's OC'd
^ Shift Faced
Click to expand...
Click to collapse
I owe it to you for having me download kernel manager.

Well with CM7 and the x99 kernal seems to give me the best battery life with the SMARTASS governor. About 20 hours with medium to heavy use.

Link?
Sent from my EVO Shift 4G powered by CM7

koolkid09 said:
Link?
Sent from my EVO Shift 4G powered by CM7
Click to expand...
Click to collapse
There is no link at this point, you have to do it via kernel manager. I'd upload it but I don't want to without bc's permission.

I haven't use any other "controllers" other than the one built into cm7... can I use that or is there a prefered one to change governers and such. Thanks!
Sent from my PG06100 using XDA Premium App

lilgrass71 said:
I haven't use any other "controllers" other than the one built into cm7... can I use that or is there a prefered one to change governers and such. Thanks!
Sent from my PG06100 using XDA Premium App
Click to expand...
Click to collapse
Since CM7 lets you change governors right in its settings I uninstalled SetCPU for now, in theory I would think it would cause more battery drain but I don't know for sure. But yes I just changed it right in CM7. I changed the governor to interactive and set the max cpu frequency to 1036MHz.

Gonna try this out. I love CM7 but the battery is killing me. I pray this works.

Android system & cell standby seem to be the battery use culprit. I will give this a try though but don't really think its in the kernel. Ill report back...
Sent from my PG06100 using XDA App

This kernel seems to be really good about not sucking the battery while on standby for me, that seems to be the crown jewel of it all. Right Now I am at 14 hours off the charger with 29% left.. remember I was lucky to get 8 hours most days before using this kernel.

This is off-topic, but along the same lines: which kernels gave the best battery life for Sense?

+1 OP was right I flashed this kernel and so far so good on battery life
Sent from my PG06100 using Tapatalk

c00ller said:
This is off-topic, but along the same lines: which kernels gave the best battery life for Sense?
Click to expand...
Click to collapse
Honestly I didn't get much difference between x99 and bcnice20's 1.5GHz kernel so either of those two. Scarykernel SUV works well on Sense if your phone can boot it too.

fifedogg said:
Android system & cell standby seem to be the battery use culprit. I will give this a try though but don't really think its in the kernel. Ill report back...
Sent from my PG06100 using XDA App
Click to expand...
Click to collapse
It seems to be true. I'm def getting better battery life. I also calibrated my battery but I've done that before without any major change. So far I have 5 hours of quite a bit of use and I'm at 71% I would normally be around 55-60% by now. I wonder what the main difference is with the kernel...

PaulB007 said:
Ok guys. I have to admit, I was about to give up on CM7 due to battery issues and what seemed to be memory leaks progressively making my phone lag more and more throughout the day. I have found something some of you may not be aware of and I wanted to share this amazingly helpful kernel with you.
Using x99, Scary, and stock kernels regardless of governor I seemed to maybe get 8 hours of battery life with moderate to heavy use. I am proud to say, using bcnice20's kernel I have had my phone on for 9 hours with 60% battery life today. This is incredible, even with lighter use on the other kernels I had NOWHERE near this amount of battery left.
Most of you may not have seen this kernel because it isn't posted. (as far as im aware) Let me help you out. First, go into your Market and download Kernel Manager. There is a lite version in there that is free. If you have an extra buck or two donate to the developer for making a neat app where you can download kernels in a convenient place by downloading the pro version.
What you will be downloading is called bcblend SIO tinyRCU kernel. I have not tried VR tinyRCU kernel yet. Not sure what the differences are, if someone could elaborate that'd be appreciated.
Regardless, I find the sweet spot for this to be at 245MHz min and 1GHz max on Interactive governor to work really well. The phone does not seem to get laggier throughout the day and consistently performs well, snappy, and just way better than the other kernels. (No offense to x99 and Scary, I appreciate all you've done!)
Give it a try and let me know if you all have similar results! I have heard that AOSP gets less battery than Sense ROMs from people on this very forum, and this may be the kernel to put that little debate to rest.
Oh, and be sure you have the latest CM7. I am on 7.0.2.1 trying this out.
Click to expand...
Click to collapse
I have been using the x99 kernal and i have about 1 d and 12 hrs with about 45 % left.. I also have the calibrator apk from the market so it wipes the battery stat when im at 100%. and various other apps that deal with the speed of the sd card and what nots. So, me coming from the Hero is very happy with this phone...
Thank you for sharing your findings... THIS IS SO AWESOME !!!!!

CrashV2010 said:
I have been using the x99 kernal and i have about 1 d and 12 hrs with about 45 % left.. I also have the calibrator apk from the market so it wipes the battery stat when im at 100%. and various other apps that deal with the speed of the sd card and what nots. So, me coming from the Hero is very happy with this phone...
Thank you for sharing your findings... THIS IS SO AWESOME !!!!!
Click to expand...
Click to collapse
Holy crap that is good battery, how often are you using the phone?

Thanks PaulB007. Followed your suggestion and my battery life has DRASTICALLY improved!

PaulB007 said:
Holy crap that is good battery, how often are you using the phone?
Click to expand...
Click to collapse
Medium use.
On my Gingerbreaded Evo-Shifted Premium XDA App.

Best rom for battery life?

Does anyone know the best fully functioning rom with the best battery life?
(Sense or AOSP)
Thanks in advance!
Sent from my Huawei U8800-51 using xda premium

CyanogenMod 7 with tiamat kernel gets pretty good battery life. The kernels tend to have mor eaffect on battery life then the roms themselves.

Thanks!
And for some reason my gf's EVO is dying really fast. I mean it drains 1% every 5 mins.
I replaced the battery and still the same thing. It's running CM7.
Sent from my Huawei U8800-51 using xda premium

Decks Tiamat 3.3.7 CoD tweaks vipermod 499 or 537/245 on smartass
Sent from my PC36100 using XDA App

Try MIUI with Tiamat 3.3.7 SBC

Sounds like she might have 4g running all the time. Or maybe she might be updating/refreshing her background data to often. Only use 4g to down load big files or steaming vedio. Check her 4g connection and turn off or her sync rate set it to every 3 hours or more. If one or both are the culprit then she'll see a big improvement.
I run EVO Deck rom with cyanogenmod love it. And every thing works.
Hope this helps

I figured I'd chime in because you said you wanted a fully functioning ROM. CM7 and Deck had always yielded the best battery life for me with the last rev of the Savage Zen Kernel, but if you're like me and are very anal about the phrase "fully functioning" then it should be noted that the AOSP ROMs don't have 720p video recording. If that doesn't bother you than CM7 or Deck all the way.
That said i'm running TommyTomato's Classic ROM with the Freedom Agressive kernel and I'm getting 25+ hours on a charge which puts it on par with any AOSP ROM/kernel combo I've run. Might be able to get a little better on AOSP, but I'd say that's pretty damn good and it's fully functioning as in EVERYTHING works 100%.

pvaldeben said:
Sounds like she might have 4g running all the time. Or maybe she might be updating/refreshing her background data to often. Only use 4g to down load big files or steaming vedio. Check her 4g connection and turn off or her sync rate set it to every 3 hours or more. If one or both are the culprit then she'll see a big improvement.
I run EVO Deck rom with cyanogenmod love it. And every thing works.
Hope this helps
Click to expand...
Click to collapse
4G is never on, Background data is unchecked, Email is set to manual sync, brightness is dimmed, no wifi. I feel as if I've done every battery saving trick in the book.
But I realized yesterday that I had SetCPU at 700mhz to save battery. I uninstalled it and the battery life wasn't dropping so rapidly. I can't say that was the issue. I'll have to run a few more test.

CTTKDKing said:
I figured I'd chime in because you said you wanted a fully functioning ROM. CM7 and Deck had always yielded the best battery life for me with the last rev of the Savage Zen Kernel, but if you're like me and are very anal about the phrase "fully functioning" then it should be noted that the AOSP ROMs don't have 720p video recording. If that doesn't bother you than CM7 or Deck all the way.
That said i'm running TommyTomato's Classic ROM with the Freedom Agressive kernel and I'm getting 25+ hours on a charge which puts it on par with any AOSP ROM/kernel combo I've run. Might be able to get a little better on AOSP, but I'd say that's pretty damn good and it's fully functioning as in EVERYTHING works 100%.
Click to expand...
Click to collapse
I will definitely try that combo and see what happens. I always flash roms but never kernels, to scared haha.

I get better battery on drews ICS ROM Than any from I've run in a year. I use it as a daily, it isn't completely fully functioning though, as 4g doesn't work and video is iffy.
That said, after I updated to latest radio, my battery is dying much faster........did you do the radio update ?
Sent from my PC36100 using xda premium

KayxGee1 said:
I will definitely try that combo and see what happens. I always flash roms but never kernels, to scared haha.
Click to expand...
Click to collapse
If you're flashing ROMs, you're already flashing kernels. Don't fear the kernel flash. Tiamat Lee on CM7 or Deck's is where it's at.

scottspa74 said:
I get better battery on drews ICS ROM Than any from I've run in a year. I use it as a daily, it isn't completely fully functioning though, as 4g doesn't work and video is iffy.
That said, after I updated to latest radio, my battery is dying much faster........did you do the radio update ?
Sent from my PC36100 using xda premium
Click to expand...
Click to collapse
Nope, no radio update. Im going to see how the battery life is at the end of the day without SetCPU.

MIUI or salvagemod 1.4 with Tiamat 3.3.7 SBC

smelkus said:
If you're flashing ROMs, you're already flashing kernels. Don't fear the kernel flash. Tiamat Lee on CM7 or Deck's is where it's at.
Click to expand...
Click to collapse
I meant interchanging kernels with custom roms.
A lot of people are saying the same thing so I guess I'll try those recommendations.

If you want sense go with team nocturnals shooter ROM it has been my daily for a good while and I really love the battery life
Sent from my PC36100 using XDA App

Dude Tommy's classic rom with the standard kernel gets some of the best battery life I seen!
Sent from my PC36100 using Tapatalk

gainiacster said:
Dude Tommy's classic rom with the standard kernel gets some of the best battery life I seen!
Sent from my PC36100 using Tapatalk
Click to expand...
Click to collapse
+20
This is Sense based ROM with the best battery life for evo 4G

KayxGee1 said:
4G is never on, Background data is unchecked, Email is set to manual sync, brightness is dimmed, no wifi. I feel as if I've done every battery saving trick in the book.
But I realized yesterday that I had SetCPU at 700mhz to save battery. I uninstalled it and the battery life wasn't dropping so rapidly. I can't say that was the issue. I'll have to run a few more test.
Click to expand...
Click to collapse
Any wake lock?
Sent from my PC36100 using xda premium

KayxGee1 said:
Does anyone know the best fully functioning rom with the best battery life?
(Sense or AOSP)
Thanks in advance!
Sent from my Huawei U8800-51 using xda premium
Click to expand...
Click to collapse
I'm on Tommys Classic Supermagic,running the Hard to kill battery calibration script from Zepplins thread and i'm getting the best battery life i've had on any other rom and i've used this script with about 10 different roms,from AOSP to Sense 3.0,wont run 3.5 because of bugs and no 4G,after a full charge with alot of phone calls,texts and surfing,i held a charge for 4 days,it was 67% on the second day and actually died on the forth AM.

I'd definitely do a comparison between screen-on and awake time.
If you don't know this, you can access it through Settings > About Phone > Battery Use/History/Etc. See if the bar graphs of screen-on match awake. If you see a long bar under awake, but not a matching one under screen-on, you probably have a process or app that is stuck and needs to be removed/re-installed or have it's data cleared.
Note: it's normal to have some awake time that doesn't match screen on as apps/processes still have to perform there activities even with the screen-off, however, it shouldn't be a ton.
The best app out there to study this IMO is betterbatterstats. Hope this helps! Cheers!

Best kernel for battery life?

Anyone can help me with experiences with a kernel that has great battery life? I'm travelling to NYC (8 hours flight) so I would love to get the best out of the battery of my N7.
I would try 1 by 1 but my travel is tomorrow.. So yeah
Sent from my Nexus 7 using Tapatalk 2

I use the Faux Ultimate Kernel, and I simply under clock it when I want more battery life. I've managed to get almost a week out of it with moderate use, while being under clocked.

BurnRubber90 said:
Anyone can help me with experiences with a kernel that has great battery life? I'm travelling to NYC (8 hours flight) so I would love to get the best out of the battery of my N7.
I would try 1 by 1 but my travel is tomorrow.. So yeah
Sent from my Nexus 7 using Tapatalk 2
Click to expand...
Click to collapse
There is no "best" kernel or rom, They're opinions and subjective as it depends on your apps, usage and settings which is why these type of "best" or "fave" topics are not allowed on XDA.

TheATHEiST said:
There is no "best" kernel or rom, They're opinions and subjective as it depends on your apps, usage and settings which is why these type of "best" or "fave" topics are not allowed on XDA.
Click to expand...
Click to collapse
Maybe I got the title wrong. I just would like to hear experiences on battery life with kernels. That's it. I don't have time to try kernels at the moment :/
Sent from my Nexus 7 using Tapatalk 2

If you don't have time to experiment, then pick and Kernel which supports under clocking and under clock it for more battery life. That should help a little bit.
But like TheATHEiST said, there is no best, only preference.

TheATHEiST said:
There is no "best" kernel or rom, They're opinions and subjective as it depends on your apps, usage and settings which is why these type of "best" or "fave" topics are not allowed on XDA.
Click to expand...
Click to collapse
True... but I don't think the OP was looking for 'best'... just garnering opinion on 'optimum'...(which I suppose might be regarded as semantic hair splitting; and so perhaps this should have been posted in 'General' instead of 'Q & A').
And in any case, if such threads aren't allowed, then this http://forum.xda-developers.com/showthread.php?t=2151963 is in serious breach of the rules.
----
For what it's worth, franco kernel (http://forum.xda-developers.com/showthread.php?t=1823671) offers pretty good battery life... in my experience.
Rgrds,
Ged.

i'd go with franco or m kernel

BurnRubber90 said:
Anyone can help me with experiences with a kernel that has great battery life? I'm travelling to NYC (8 hours flight) so I would love to get the best out of the battery of my N7.
I would try 1 by 1 but my travel is tomorrow.. So yeah
Sent from my Nexus 7 using Tapatalk 2
Click to expand...
Click to collapse
Check my Sig for my guide! Just got updated!
Sent from my Nexus 7 using xda premium

Ive had good battery life on intersect raven, m-kernel and motley. you can also try setting the max active cores of these kernels to 2, with minimal loss to performance (it's a bit sluggish for multitasking though)

Thread Closed
Ok Folks, you all know the rules about Best/Favorite Roms and Kernels and such. Not allowed due to flame wars sometimes starting.
Roms and Kernels are personal opinions, and what works best on 1 device, may behave differently on another. This is the way it is. The best method, is to read the kernel threads, and try a couple different ones.
The following thread, is the only OFFICIAL thread sanctioned by the Moderators. Please post your questions there, so that we may keep the forum cleaner for better searches.
http://forum.xda-developers.com/showthread.php?t=2151963
Thanks,
MD