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[Q] Stock battery life compared to custom roms

Hello,
i'm new on the Nexus S. I had a Milestone and tried pretty much every custom rom, as the Milestone stock rom was slow, unstable and outdated.
I read many times "great battery life" within the description of Nexus S custom roms (e.g. Codename).
BUT, is it better than the stock-kernel battery-life? And how much better (guess)?
I ask, because most of the Roms are overclocked and perhaps the "great battery life" is relative to those speed-optimized roms.
For me the speed of the stock rom is totally okay and it seems totally stable. I would only "custom-ize" it, if the battery life would be (significant) better – else: "Never change a running system!"
AK
p.s. Links are welcome, as i didn't find any comparison like this.

I have found stock GB rom was a battery hog. I tried a few roms but loved that CNA will pull all your apps from the market for you(I didn't have to download them all manually)
With a custom rom you can change more settings, you can change governors, you can change the cpu speeds and voltage. With deep idle sleep working your phone sips power when in your pocket. I like the Air Kernel,3.x with the scary setting, seems to use lower cpu frequencies more often.
you can find roms that are stripped down to next to nothing, these should give you better battery life then stock, to fully loaded roms that most likely will not give you better battery life.
I have my cpu set to 200 min and 1400 max running air kernel with the scary governor. scored around 2500 on Quadrant and battery last pretty good as when I just have the screen on, not doing much the cpu is running 200Mhz and the phone goes in to deep sleep right away.
try CPUspy and cool tool, CPUspy lets you see the states the cpu is using for a given time and cool tool can display cpu/power details in the top bar.

Through my ROM testing with ICS, most ROMs give very comparable battery life. Battery life relies very little on the ROM itself assuming there is no wakelock or similar issue which is because of the ROM, which in a good ROM there won't be. There may be some settings which are added or changed that have some effect, but likely nothing very major, especially in my experience.

Normally the bloatware is what drains battery with unused apps opening in the background.
Custom ROMs omit and give the option of certain bloatware.
Also some ROMs have great idle compared to stock.
But overall if u control ur mobile data, wifi, gps and sync then u can better or great battery life on any ROM just as long as its not a newer ROM that is still testing. And most custom ROMs have the pull down notifications that make it easier to control all of them.
I personally use SLIM ICS and its comes simple enough that u customize it.
Vs Nexus S 4G

[Q] G2X Battery

So i'm trying to find a rom that saves battery the most. I know that ICS drains battery faster, and i am a heavy user. I'm using stock right now and listen to music like 4 hours, play some games, Check email, use internet, etc.. idc if its cyangmod or ICS, i just want a rom that saves the battery the most. BTW, i overclock my Cpu to the highest, but use profiles.

You can't have power and long battery life (both at the same time). You need to underclock to get a better battery life or you can forego with buying a bigger battery and then OC it to the Max.

Best bet is a GB rom with Trinity elp kernel.. it has Max undervolt and an oc to 1.1ghz
Sent from my LG-G2x using Tapatalk 2

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From my personal testing the Trinity ELP kernel drains more than stock CM7 kernel, on idle. It may allow undervolting & underclocking & other fancy features, but at the default voltage & clock, drains more.

Ways to increase battery life?

My wife uses a rooted Bolt running Virus' Eternity ROM with Sense 3.5. I'm open to trying new ROMs and other less drastic measures as well. I've thought about switching to an AOSP ROM that might free up more memory. I personally use Liquid Smooth and have been trying tweaks to see if my battery life improves before trying to change hers. She uses the FM Radio a lot at work which is the primary culprit of her battery consumption. It's generally fully dead after 6 hours. What options do I have that might increase that life a little longer?

You may wanna take a look at THIS THREAD

Thank you much. I'm not sure how I've missed that thread as I've spent a good bit of time on those forums as well looking at different tweaks.

SGS3 CPU sweet spot?

I just rooted my SGS3 international ver. i was wondering if anyone has experimented with the GHZ and found a solid sweetspot that gives great performance and equally great battery life.
thank you

I have been running at 1.5Ghz and at least -100ma undervolt for all frequencies using Siyah kernel, battery life is fantastic so far, perfectly stable and performance is a bit higher in benchmarks than stock. I am easily getting two days with light usage, so far today 30min music playback, 40-50min web browsing and 4 or 5 hours of standby has used about 17%.

[Q] rom vs kernel in battery life

This is a rather simple question do different roms really have better battery life then others or is it more of the choice of kernel? Do roms effect battery life as much as the choice of kernel? I currently have vipers Rom and just maxed out at 3:20 of screen on time with stock battery with underclocked and undervolted Sebastian kernel and want to no if switching to elegancia Rom would really make a difference in battery at all
Thanks

Lostmymind904 said:
This is a rather simple question do different roms really have better battery life then others or is it more of the choice of kernel? Do roms effect battery life as much as the choice of kernel? I currently have vipers Rom and just maxed out at 3:20 of screen on time with stock battery with underclocked and undervolted Sebastian kernel and want to no if switching to elegancia Rom would really make a difference in battery at all
Thanks
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Hi,
Battery usage is a very subjective matter.
Everyone uses their phones differently,so , judging battery life between people is hard.
Yes , some ROMS are better than others.
Yes, some kernels are better than others.
It is the combination of the right ROM and kernel for you that is going to matter.
And no one can tell you what that is.
Experiment for a couple of days to see how they work.
READ what other people are saying about them in the threads.
OR,
Get a couple of spare batteries,and carry them around with you,and then , power is never a problem.