[Q] Why do AOSP ROMs have such a high battery drain? - Galaxy S I9000 Q&A, Help & Troubleshooting

Hey guys,
in the past few weeks I flashed around 10 different ROMs (AOSP builds like MIUI, CM9, CM7 and also tweaked Samsung builds like JetPackMod, S.U.R.F.A.C.E and Darky's ROM). I would have stayed on one of the AOSP builds but they just have a way too high battery drain.
For example: On stock JVU with Galaxian Kernel I lose 30 percent after 1:30 hour of display on. MIUI/CM7 my drains my battery to zero after 2 hours display on time.
So my question is: Why do AOSP ROMs have such a high battery drain compared to Samsung ROMs?

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[Q] Which custom rom offers the best battery life and stability

I'm all about battery life and stability. I don't use a static wallpaper, don't game, disable all Bluetooth/GPS when I don't use it. I use touchwiz because it seems to be the most lag free.
I'm currently using Cassies Xtra-Lite V5 and it drains more than 1 percent per hour. doing nothing.
I used to be on an older Cassies Xtra-Lite rom and it drained 3-4 in 8 hours. Forgot which one though.
Try RevoHD

Huexxx kernel 4.0 with mod battery drain

Helloy guys will the kernel I told above 10 hours maxmium battery without touching the phone you know what does this mean it means without doing anything only alarm rigs 6 min and switched off the battery finishes in 10 hours why??
CM7 300-1000MHZ
for more specific deep sleep(by cpy spay) is 97%
Battery use
Mobile stand by 48%
phone signal 38%
Android OS 4%
display 4%
also the charging is too slow charging 1% / 10 min
It's CM7 bug. Heuxxx kernel is good, but it's old. Doesn't have latest CM7 commits which fix aspects of the kernel code.
Try boype's kernel but i still get max 16hrs of battery use on any CM7 rom. I think it would be wise to stay away from CM7 based roms until a fix comes if battery drain is an issue for you.

[Q] CM10 battery life and other stuff

This is the first time I have flashed a custom ROM.I recently flashed the latest stable CM10 with the JB semaphore kernel and its been great so far as far as performance goes. But the main issue is the battery life, on moderate usage it seems to only last 10-12 hours. I tried the usual fixes like changing my modem, battery calibration and also making sure the com.media.process was not running continuously(using better battery stats app), and it seems to have slightly improved.
Questions are
1)Is this normal battery life to be expected from CM10?
2)Does CM9 have a better battery life than CM10?
3)Are there any other JB roms that will give me a somewhat bug-free plus high performance/good battery life?
4)Is the current stable CM9 more suited for everyday usage than CM10? I read that CM10 still has lots of bugs and issues?
Thanks in advance guys
My battery in JB lasts for maximum 10 hours
So there are no JB roms that have good battery life?
This is very important question for me, need to know witch ROM is better cm9 or cm10? battery draining extremely fast(8 hours aprx.)
Did someone tested this issue?
I'm not sure if I want to downgrade even if the battery life is better but I'm interested in this matter too.
Actually my only issue with JB battery life seem to be a rom issue ...
Yeah there is clearly something wrong with your installation. I am running CM10 Fishears Nightly, JB Semaphore 2.6.0 Old, XXJW4 radio and I usually have about 70% battery left at the end of a working day when I put my phone on the charger as I go to sleep. On a usual day, I listen to about 2hrs music on the train and do some light browsing/games throughout the day.
Here are my Semaphore settings:
Governor: Ondemand w/ Smooth UI enabled
Active scheduler: Simple I/O
Deep Idle Enabled
SAI Enabled
SD Card read ahead: 256KB
Normally the only apps that run in the background on my phone are:
BLN
Voodoo Sound
GO SMS
Settings
SwiftKey
WidgetLocker
Widgets
This way I don't have crap pulling my phone out of sleep all the time. On CM10 you should be able to get at least 2-3 days out of a single battery charge.
here my batterystatts i use stock cm10 with the newest nightly and the stock kernel sheduler noop govenor ondemand my 3g is enabled and i use more or less hole day wlan. i have the original battery.
Sent from my GT-I9000 using xda app-developers app

Battery drain in versions 4.2 and 4.3 of the android

Hello guys, since I've tested some version of higher than 4.1 android, I have problems with the battery, I'm currently using the stock version (ICS), but the only ones that work with a good battery life is ICS and JB - 4.1
I'm sure it could not be any app I have installed, because even when I finish installing the ROM, the battery dies in a ludicrous speed!
I did a little test, with the phone idle for 2 minutes will be 1 percent of the battery, or the battery dies in less than 2 hours, making it unusable.
I took some pictures of the screen in the settings of the battery.
Please, HELP ME ! :silly:

AOSP battery problem

I installed AOSP but the battery charging speed and the battery life itself was very low so I reverted back to miui v6 dev version. Any update or any solution to overcome the battery problem (never thought I'd say this but sick of MIUI now)

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