Database Users

Bad Battery Life

I'm getting bad battery using my phone. Can you guys recommend SetCPU profiles or settings, or do I need a new battery? Thanks!
Sent from my FroyoEris using XDA App

In case you've set a min/max something like 19 (min) to 768 (max), try setting the min quite a bit higher, like in the 200-400 range. See if that helps. Also, don't go crazy setting a whole bunch of profiles. In fact, for troubleshooting, don't use any so you can narrow things down.

245 245 works really well and doesn't make the phone take forever waking up
Sent from my FroyoEris using XDA App

My setup settings are:
Main-806max, 604min
Screen Off-480max, 19min
Battery 50%-768max, 480min
All set to on-demand
Sent from my FroyoEris using XDA App

TheSonicEmerald said:
My setup settings are:
Main-806max, 604min
Screen Off-480max, 19min
Click to expand...
Click to collapse
Not specific to this topic, but I suspect you really see much difference between 806 and 604...
For your screen-off profile, change the min to something like 245. Just try it for a day or two and see what happens.

I too have poor battery life. We're talking down a percent every 2 minutes. I'm running the Droid does rom. I'm gonna try your settings and see how that works.
Sent from my Eris using XDA App

My battery drains fast too. I stopped using setcpu. When I'm not using the internet I turn it off. Now my battery last a lot longer.
Sent from my ERIS using XDA App

hallstevenson said:
Not specific to this topic, but I suspect you really see much difference between 806 and 604...
For your screen-off profile, change the min to something like 245. Just try it for a day or two and see what happens.
Click to expand...
Click to collapse
im at 710/844 2**/4** with half decent battery life. but i do stil walk around with a charger
getting linpacks of 5.783 @ 844mhz!

Well a lot of you have seen my posts on this subject but the op asked so...
I have no setcpu installed, no autokiller. The Froyo ROMs are default set to 710mhz and I enable JIT as it helps battery life. You also NEED to calibrate correctly to see best battery life.
CGriffiths86 summed up my long winded version of battery calibration like this...
1. Fully charge the phone
2. Shutdown, boot into recovery, and Wipe battery stats
3. Reboot from recovery and use the phone as normal until it completely dies
4. Fully recharge the phone
With battery cal, no setcpu, and no autokiller, I get 27-30hrs on a full charge with solid use all day including bt music playback, navigation, calls, texting, and minimal web access.
The other settings I use are.
VMheap 24
Screen at 35% brightness

N2...
What about the other 2 settings with JIT? Do you have them checked or unchecked? Comcache? and Dithering?

eghill1125 said:
N2...
What about the other 2 settings with JIT? Do you have them checked or unchecked? Comcache? and Dithering?
Click to expand...
Click to collapse
I dont use compcache (although I have read that it works well with FROYO based ROMS), and I dont enable surface dithering (doesnt add that much crispness to the display to me and takes away from processing power). I dont believe either of these settings will have much impact on battery life though so try them out and if things are still as snappy as you want then MPTY.

oh yeah try turning off auto sync it helps me a bit

Using CELB 2.8, I get about 24-30 hours of battery life with a fair amount of usage.
http://www.techradar.com/news/phone...android-battery-life-should-last-a-day-690439 when Page made this comment, I was at the time convinced that my phone itself was to blame and quite incredulous with regard to his statement. Turned out...he's right, at least in my case. I'd say stop looking at OS settings and focus on the apps you have installed.
I was having absolutely terrible battery life, even with this rom (though at version 2.5 or so), and couldn't figure it out for the longest time. The culprit turned out to be NewsRob, an RSS reader that syncs with Google Reader. I had it initially set up to sync every 4 hours or so, but the default is 1. Somehow, thanks to Apps2SD, when I flashed a new ROM, the sync settings reverted back to the defaults. I finally figured this out and changed my settings to manual sync and battery life has been epic ever since.
Another app that I think was causing some drain was Locale, as it's constantly polling your phone for data about its condition. I stopped using it altogether and am just out the 6 bucks, I guess.
And another thing that helped was completely removing AutoKiller from my phone.
Some more info on SetCPU settings: http://forum.xda-developers.com/showthread.php?p=6901762#post6901762
And this guy's very helpful post on general settings: http://forum.xda-developers.com/showthread.php?p=6957276#post6957276
Last thing, there's an app called JuicePlotter in the market which is really good at helping see trends in your battery drain. It's free.

lostsync said:
Using CELB 2.8, I get about 24-30 hours of battery life with a fair amount of usage.
http://www.techradar.com/news/phone...android-battery-life-should-last-a-day-690439 when Page made this comment, I was at the time convinced that my phone itself was to blame and quite incredulous with regard to his statement. Turned out...he's right, at least in my case. I'd say stop looking at OS settings and focus on the apps you have installed.
I was having absolutely terrible battery life, even with this rom (though at version 2.5 or so), and couldn't figure it out for the longest time. The culprit turned out to be NewsRob, an RSS reader that syncs with Google Reader. I had it initially set up to sync every 4 hours or so, but the default is 1. Somehow, thanks to Apps2SD, when I flashed a new ROM, the sync settings reverted back to the defaults. I finally figured this out and changed my settings to manual sync and battery life has been epic ever since.
Another app that I think was causing some drain was Locale, as it's constantly polling your phone for data about its condition. I stopped using it altogether and am just out the 6 bucks, I guess.
And another thing that helped was completely removing AutoKiller from my phone.
Some more info on SetCPU settings: http://forum.xda-developers.com/showthread.php?p=6901762#post6901762
And this guy's very helpful post on general settings: http://forum.xda-developers.com/showthread.php?p=6957276#post6957276
Last thing, there's an app called JuicePlotter in the market which is really good at helping see trends in your battery drain. It's free.
Click to expand...
Click to collapse
This is gotta help a lot, thanks! And thanks to the other guys for quick replies!

With a full battery in the morning, o usually have about 20% left about now which is 10:53pm EST. I charged all night last night, wiped battery stats this morning as soon as I took it off the charger, and I have 52% right now! And I have used it more than I usually do. I don't know why that seems to have worked but I hope it does the same tomorrow.
Oh yeah, Setcpu set to 710 max, 245 min, screen set to manual brightness at 45%
Sent from my Eris using XDA App

Go on ebay and search for HTC Eris batteries. For $15-20 you can buy 2 extra batteries with an EXTERNAL charger. I run my batteries to 15% or less, pop it out, put in a fresh (cool) battery, and put the dead one on the charger. No more carrying a charger everywhere I go or using a landline because my cell is about to die. Then your settings don't really matter. Even if you can use 3 batteries in a day, you'll have a fresh one (or 2) charged by the time you burn up the 3rd one.
Sent from my FroyoEris using XDA App

Battery life with froyo.

Aren't we supposed to have better battery life especially since the JIT compiler is on 2.2? My slide ever since I rooted it seems to get pretty bad battery life using around like 8 hours using it all day for email and ****. But when I had the espresso sense stock ROM I could easily get 14 hours of battery life on the same usage.
Just wondering maybe some mem suckers or something? I'm not using live wallpapers either and I stay on wifi pretty much at my house all day.
I'm on the latest CM6 nightly.
Sent from my Mytouch Slide with Cyanogen's latest mod.

Boot into clockwork recovery. Hit advanced, wipe battery stats, reboot.

I've been using the 806 kernel (thanks dumfuq) with roman's 1.8 ROM and honestly, if you load up the latest SetCPU (I didn't use it much previously), it does the work for you.
I set up 3 main profiles and a couple others. Basically, I wanted whenever my Battery was < 100% to run at max/min 806/600 conservative(but i change this time to time), then Batter was < 15% m/m 600/400 powersave, but the profile the rules all will be whenever my Screen Off m/m 245/245. Now that can be a pain for letting your phone go while it does stuff because it does run a lot slower then while it's off, but honestly this does the trick completely, I've had freakin sick battery life.

Thanks for the replies. See its not too bad its just significantly lower than the slides ota update stock. But I am runing set cpu and that seems to help out alot. Post me your exact profiles and ill try them out. Also I did wipe battery stats and **** when I first flashed everything over but thats been like 4 nightlies ago. Ill do it again tonight when its dead and then recharge it all night.

Otherkid said:
Thanks for the replies. See its not too bad its just significantly lower than the slides ota update stock. But I am runing set cpu and that seems to help out alot. Post me your exact profiles and ill try them out. Also I did wipe battery stats and **** when I first flashed everything over but thats been like 4 nightlies ago. Ill do it again tonight when its dead and then recharge it all night.
Click to expand...
Click to collapse
In order, here's how I liked mine (but again, itll vary on your usage and junk..)
Type=Screen Off, min/max=245/245, priority=100, gov=powersave
Type=Charging USB/Full, min/max=806/600, priority=95, gov=ondemand
Type=Charging/Full, min/max=806/600, priority=90, gov=performance
Type=Battery<15%, min/max=400/400, priority=75, gov=powersave
Type=Battery<100%, min/max=806/600, priority=70, gov=conservative
Obviously, I'm still working and adjusting but for now this is how Ive been running and really had some great bat life. I may change the governor at any given point for perf. purposes, but usually this is what Ive had it at for a few days. If you have any questions feel free to PM me and I can help you out a lil more too man.

Thanks
TJD319 i gotta say thanks also for those profiles, I made a CM6 youtube vid for slide thats uploading and i want you to know i gave you full credit for the profiles that i use. they really are a big help, so i want you to know that.

I also would like to say thanks, with your profiles TJD319 my phone has been running mightly fine, no problems!
Remix, cool video, would be a nice refrence for people looking into overclocking/flashing cm6.

I'd also like to thank you for the profiles. I set them up yesterday and as of right now (on #TeamFenix 1.8 with the recommended kernel... not 806), I've had it unplugged for 27 hours and I'm at 38% battery left.
Thank you!

OverClock App?
I'm using CM6. Which app are you using for overclocking?

JGonzo10 said:
I'm using CM6. Which app are you using for overclocking?
Click to expand...
Click to collapse
Only the best one out there, called Setcpu. Dont use any of those other ones, setcpu is in its own league.

I downloaded and set up SetCPU for only the screen off @ 245, and wow that alone has helped battery life immensely.
Sent from my T-Mobile myTouch 3G Slide using XDA App

mmmark111 said:
Boot into clockwork recovery. Hit advanced, wipe battery stats, reboot.
Click to expand...
Click to collapse
What does that do and how does it affect battery life?

I am yet another VERY satisfied Setcpu customer. Major improvements on an OC'd rom. The cool thing about Michael Huang is he posts the app free here on XDA. Seek and ye shall find.

I'm thinking about going back to the 806 kernel. When using that on CM6 with SetCPU I got up to 4 days with regular use. Now it's 2/2.5 with the 844. I suppose it's a drawback for wanting to play Final Fantasy 7 smoothly.

You guys need to understand the profile settings to realize what you're doing with them.
Powersave: always runs at the minimum you set.
Performance: always runs at the maximum you set (mainly used for benchmarking).
Ondemand: starts at your min, and clocks up according to how much cpu it needs. For ex. if I have it set at 400/806 ondemand, it stays at 400, goes up to 600 if it needs too, and then goes up to 806 if it needs to.
Conservative: same as ondemand, but tries to stay lower if possible.
Sent from my T-Mobile myTouch 3G Slide using XDA App

BigFellor said:
What does that do and how does it affect battery life?
Click to expand...
Click to collapse
In the off chance your battery has been improperly calibrated, this will give you the chance to recalibrate. This goes for all android devices. I have had to do it once so far with my slide. The battery wouldn't last longer then 8 hours. Wiped the stats, recalibrated, and voila.
Sent from my T-Mobile myTouch 3G Slide

mmmark111 said:
In the off chance your battery has been improperly calibrated, this will give you the chance to recalibrate. This goes for all android devices. I have had to do it once so far with my slide. The battery wouldn't last longer then 8 hours. Wiped the stats, recalibrated, and voila.
Sent from my T-Mobile myTouch 3G Slide
Click to expand...
Click to collapse
Thanks, I got this info from another thread on here, so I will give it a try ... if I can convince the wife to stop charging the damn thing before it dies ...
ad505 said:
let your phone die. turn it back on, run it until it dies again. keep trying to turn it on til it dies and worn't turn back on. Then plug it in, still powered off, and let it charge til the light turns green (should take 3-6hrs, patience...). Boot phone, still plugged in, and let LED turn green again. Reboot into recovery. Wipe battery stats and dalvik cache. reboot. let your phone settle for about 20 minutes before unplugging it. this should calibrate your battery.
Click to expand...
Click to collapse

Battery

I was wondering how I could extend that battery life on my DINC? Any suggestions and tips would be great.

Ah yes, the battery issue. One I am all too familiar with.
Easy:
For whatever reason our phones charge to 90% and stop there. To correct this, you can either charge while the phone is off or do what we call a bump charge. Bump charging involves charging the phone to "full" while its on (the light should be green) and then turning it off while still plugged in. The light will then change to orange again for 30+ minutes and then green again. You will then Really be fully charged.
Also make sure you have GPS and Bluetooth off when you aren't using them. This will help a ton.
There is an option in Settings - Wireless & networks - mobile networks - called "enable always on mobile data". Unchecking this will drastically help save while the phone is asleep on the 3g network. However, doing this will affect how often you receive updates to chats and sync items when the phone is sleeping. To me it isn't a big deal since if I'm not using the phone why should it be working, but everyone is different!
Finally, a rogue app might be nomming away at your battery. An app from the market called System Panel will monitor how much battery each app is eating. Its free initially but if you want it to monitor over time in the background it does cost. However it is definitely worth it since its a great app and useful for any android owner.
Intermediate (has cost):
Evo batteries fit in our phones! The fit is a little tight but it works just fine. Our stock batteries have 1300mah of capacity which is a bit on the low side. The evo battery has 1500, so it's an hour or so better. You can buy them cheap off ebay (OEM Evo Battery) for around $15.
Conversely, there is the official extended capacity battery for our incredibles with a massive 2150mah. The trade off is that it adds bulk to your phone and costs a lot (around $50). There is the third party seidio battery which adds even more capacity (3500) but adds even more bulk.
Advanced:
Are you rooted? There are kernels out there that are undervolted like Hydra kernel, adrynalyne's undervolted and kingklick's voltage scaling kernel. Everyone has differing experiences with them so there's not a solid "best" so to speak. You can flash these kernels using the clockworkmod recovery. This will all be nonsensical if you're not into the Modding scene.
Also if rooted, you can underclock the processor which, depending on the kernel, can help drastically save battery. You can set profiles to have the cpu work at a minimum speed while the screen is off. Kingklick doesn't advise using setcpu with his kernels and it straight up wont work with hydra's, but it can do wonders on any others.
--
Depending on your activity, you should expect 4-5 hours of 3g awake usage and around 5-6 if you're mostly on wifi using the stock battery. 3g can be a battery drain if you're in an are with inadequate service.
Hope this helps!
Sent from my Droid Incredible using the XDA app.

turning off gps doesn't matter all that much. GPS isn't called upon unless you have an app using it. I have mine on most of the day (for tasker profiles) and have no issue.
Use WiFi when available, its quicker than 3g and takes less battery.
download setCPU (from xda) and make a profile for screen off max/min = 400/245 or something like that.
i have 'always on data' checked, no issues for me
kernels help a ton, kk#5 is a beast.
I'm running uncommon sense, kk#5 and the above settings. I'm on 20 hours unplugged with 35% less, standard usage. -- not bump charged, charged while on to 100%

isn't the system panel app like a task killer? and from what i've read task killers are pretty pointless with froyo......however i have noticed that my phone is constantly running with about 140mb of ram free, i don't know if this is usual or if something is wrong?? i just got my Dinc so i'm new to all the tweeks and tricks, i do have mine rooted though. i'm not that up on changing roms and kernals though so i'm just trying to find out what all i can do to help my battery without having to buy a bigger one. any help would be greatly appreciated!!

If you are rooted and aren't comfortable with flashing ROMs and kernels, look at setcpu that was mentioned before, and search for instructions to remove the stock apps that always startup on their own in the background. Unless you actually use them, then you can't really do that obviously. I don't have any times on how long it lasted before and how long it last now but I do know its improved. I have mine at a processor clock speed of 500mhz and I don't see much lag time unless I'm really running a lot of things. I'm on WiFi listening to Pandora and I'm not experiencing keyboard lag while typing this.
Sent from my Incredible with XDA App

is there any risk to my phone from running setcpu ? i JUST got it and really don't want to break it already!! hahaha

trembly01 said:
is there any risk to my phone from running setcpu ? i JUST got it and really don't want to break it already!! hahaha
Click to expand...
Click to collapse
no...the max it'll run is 1.19 ghz. worst that will happen is a bootloop which can be fixed through nandroid.
Just increment a little at a time. I usually run mine at 1.075 ghz w/ on demand.
screen off profile max/min - 450/245

I use JuiceDefender on my Incredible and believe it or not it really works. It's turns off your data while the phone is on sleep mode so no battery is being drained. I get at least 5 hours extra battery life. You also get other features that come along with it so just give it a try It's free!
Sent from my ADR6300 using XDA App

trembly01 said:
isn't the system panel app like a task killer? and from what i've read task killers are pretty pointless with froyo......however i have noticed that my phone is constantly running with about 140mb of ram free, i don't know if this is usual or if something is wrong?? i just got my Dinc so i'm new to all the tweeks and tricks, i do have mine rooted though. i'm not that up on changing roms and kernals though so i'm just trying to find out what all i can do to help my battery without having to buy a bigger one. any help would be greatly appreciated!!
Click to expand...
Click to collapse
Yes system panel CAN be a task killer but I do not suggest using it as such. Instead, it does a great job monitoring how much CPU each app uses so you can take educated action.
MMBosstones86 said:
turning off gps doesn't matter all that much. GPS isn't called upon unless you have an app using it. I have mine on most of the day (for tasker profiles) and have no issue.
Use WiFi when available, its quicker than 3g and takes less battery.
download setCPU (from xda) and make a profile for screen off max/min = 400/245 or something like that.
i have 'always on data' checked, no issues for me
kernels help a ton, kk#5 is a beast.
I'm running uncommon sense, kk#5 and the above settings. I'm on 20 hours unplugged with 35% less, standard usage. -- not bump charged, charged while on to 100%
Click to expand...
Click to collapse
1. If you use location based services and have GPS on, it will use the GPS module quite a bit. This is certainly a battery drain.
2. If you dont have any issues with always on mobile data then you must be in an area with good coverage. For me if its left on it drains my battery quite a bit because I'm in a flaky coverage area.
Everyone's phone is different though. Finding what works and what doesn't is the first step to perfection. I just installed the new skyraider sense and my battery life has been ultra fantastic. It works great for me, but I know others dont have that success.
Sent from my Droid Incredible using the XDA app.
Sent from my Droid Incredible using the XDA app.

General Warning: Overheating!

Just a warning to all using the FreeX10/other 2.2+ performance ROMs that I experienced is the overheating of the device. This may only be me, but I'm posting this just in case.
Quick details of my X10:
Flashed to FreeX10 Beta #4 last night.
Used SetCPU to set scaling to Performance and minimum clock speed @ 998MHz.
Using the 3G (build.prop) enhancement modification.
I have a rubber casing around the phone.
Usually connected to WiFi.
My phone has been on since last night and has been charging for most of the time since then and now.
Just then, I decided to turn my phone off a couple of times. I did not notice the heat from just holding it. I was browsing here and read a thread about removing the battery, so I just did that for some reason. It wasn't until I opened the case when I could smell the smell of melted/hot plastic - it was coming from the battery. I immediately placed the open-phone and the battery in front of a cool fan, the battery and phone both started to cool down and the smell disappeared. I couldn't find any liquid/melted plastics anywhere on/in the phone, but I could definitely smell it.
Just a general friendly warning (that can't hurt). Not sure if it's documented or not, and whether this is only Froyo or below/above.

Used SetCPU to set scaling to Performance and minimum clock speed @ 998MHz.
Click to expand...
Click to collapse
what's the point?! if it is to overheat your x10, mission complete

Why using setcpu? I use the same rom and it runs like hell without setcpu. No overheating neither...
Sent from my X10i using Tapatalk

nytral is right. You set the CPU to run @998Hmz at _all time_ so it'[s only natural that the device/battery overheated.

Mayazcherquoi said:
...
Quick details of my X10:
Flashed to FreeX10 Beta #4 last night.
Used SetCPU to set scaling to Performance and minimum clock speed @ 998MHz.
Using the 3G (build.prop) enhancement modification.
I have a rubber casing around the phone.
Usually connected to WiFi.
...
Click to expand...
Click to collapse
u have managed to make a perfect guide on how to overheat the phone...
u push all the components to their max working capacity (full cpu, 'enhancement' of radio) and on top of that u keep it enclosed in a rubber casing...
bravo!!!

DooMLoRD said:
u have managed to make a perfect guide on how to overheat the phone...
u push all the components to their max working capacity (full cpu, 'enhancement' of radio) and on top of that u keep it enclosed in a rubber casing...
bravo!!!
Click to expand...
Click to collapse
Sorry, Min is 245. Not 998.. :-/
And I'm pretty sure the material of the casing (rubber vs hard plastic) wouldn't matter, but would contribute to the heating. I'm sure that a lot of people would use a case of some sort to protect their device.
The only reason why I started this thread is because I was on a ROM not too long ago (a couple of nights ago), which has exactly the same settings and modifications, except, it wasn't running Froyo - it was running Eclair. And since I installed that Eclair ROM, the phone has only been turned off once (with the battery removed, about a couple of days after installing it and it being on and charging pretty much 24/7) and has been charging pretty much non stop.
The only difference is it is using Froyo instead of Eclair... Hence why I thought it'd be best to start this thread.

LOL, now this is n1 example of a person who didnt read before he flashed
Solution dont whipe data...
Sent from my SE_X10i using XDA Premium App

lol nice overheat guide
i'm using setcpu to scale it to powersafe and max @512 Hz
and when the screen is off it's max is set to the lowest (256?)
and when i wanna play games i always set it to min 256(?) and may 998 ans performance
then my battery won't drain so fast

nice overheating guidelines

Do you guys actually see a difference with setcpu? I have used every option available and nothing ever got slower or faster for me.
Sent from my Delorean using a flux capacitor!

Yeah I'm running 2.2.1 and my X10 is no where near hot. well, at least in temperature because its a hot-sexy phone ;P
Nice overclocking there though X10 watercooling systems now in development, expect another forum branch to open in XDA in the next coming weeks.

To my understanding the 2.6.29 doesn't support overclocking so setcpu shouldn't make a difference at all. The rubber case probably contributed to the heat retention but the heat likely is from the constant charging.
Sent from my X10a using XDA App

Try the JuiceDefender app and set it to turn off wifi and data when your screen is off or unless certain apps are visible, helps with battery and stops unused functions while your phone sleeps.
Sent from my X10a using XDA App

Phone doesnt overheat, if you use it right.

Useless topic!!
Sounds like a guy (not saying names) that Z tells to remove some files from "some" roms he was taking without permission, just trying to desestimate Z rom.
Beta 4 runs very well, theres no overheat.
Sorry for my bad english!!
Greetings from Venezuela!

I have installed cm6.1. 3 v4. 3, its a fab rom.... but charging is the main prob... even if i charge for 2 hrs continues it charges upto just 60% and it becomes very hot..... any solution for this......

madhupv said:
I have installed cm6.1. 3 v4. 3, its a fab rom.... but charging is the main prob... even if i charge for 2 hrs continues it charges upto just 60% and it becomes very hot..... any solution for this......
Click to expand...
Click to collapse
Try charging the phone while its off. Ive heard people say that their phone wouldnt charge past a certain point but after charging it whilst off it returned to charging back to 100 percent. I bought a new usb cable for my charger after the terminal end into the phone became deformed and my phone now charges ~3x faster but ive never had it get abnormally hot.
Sent from my X10i using XDA App

Hmmm... i set cpu to 998 when running emulators, otherwise its just ondemand. Using freex10 b4 for a fortnight high use frequent charging added 3g build prop lines, got no overheating issues.
Sent from my X10i using XDA App

Rofl setcpu doesnt work unless u got full access, root doesnt give that... but have fun xD
Sent from my SE_X10i using XDA Premium App

Its funny that anyone with the know how or has supposedly read these forums continue to pay for (or pirate!) apps that have no effect. WITHOUT UNLOCKED BOOTLOADER AND CUSTOM KERNEL OVERCLOCKING APPS HAVE NO EFFECT! Check the overclock option in JuiceDefender, this option is not supported! The developer of the app has apparently left out any notice that it doesnt work with our kernel so they can continue to make sales.
Sent from my X10i using XDA App

[Q] my battery is still draining fast after rooting! help please?

hi guys, i'm a newbie when it comes to rooting and stuff
i reduced all my lcd settings (display is only at 10%, removed animations, etc), turned off unecessary apps (wifi, etc) and i'm using setCPU (so i could downgrade my cpu speed) after i learned how to root here with the ff settings:
cpu range 200-500 mHz, conservative.
my phone still seems to be draining fast. i'm not watching vids or playing games.
can anyone help me or give me tips which overclock actually worked for their S2?
i was hoping my battery would last about a day.
thanks!

Suggestions: restore your cpu settings to normal to establish a base line. Then download Osmonitor and see if any application is hogging your cpu. If not, then, in recovery wipe Dalvik cache (not anything else!).
You don't say what rom you are on but assuming you are not watching video files all day, you should get a full day easily.
Sent from my Xoom using XDA Premium App

Is your device connected to an exchange account ?
Sent from my GT-I9100 using XDA App

Root has nothing to with battery life directly, but you can use T.B Pro to freeze some garbage apps always.
Besides you can't get any benefit from using SetCPU? LOL. Well I don't wanna a debate here, but that damn app will not do any useful thing other than mental satisfaction.
And you stop any app which is set as Automatic refresh in an specified interval, run as low as Widgets possible, Turn Off WiFi and Packet Data when not needed, and try to use Juice Defender which is doing a great job on mine.
Regards.

thank you for the replies
@tangiers: can osmonitor also freeze useless apps? or it just merely monitors your phone?
@jimhaddon: what is an exchange account? i don't think i set-up anything like that while i was tinkering with my phone.
@ithehappy: i think i'm only getting the mental satisfaction from setCPU like you were saying

ithehappy said:
Root has nothing to with battery life directly, but you can use T.B Pro to freeze some garbage apps always.
Besides you can't get any benefit from using SetCPU? LOL. Well I don't wanna a debate here, but that damn app will not do any useful thing other than mental satisfaction.
And you stop any app which is set as Automatic refresh in an specified interval, run as low as Widgets possible, Turn Off WiFi and Packet Data when not needed, and try to use Juice Defender which is doing a great job on mine.
Regards.
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I beg to differ. After I isntalled SetCPU and Underclocked/Undervolted my CPU I found that my battery life increased quite a bit and was no longer experiencing battery heating.

lovidore said:
I beg to differ. After I isntalled SetCPU and Underclocked/Undervolted my CPU I found that my battery life increased quite a bit and was no longer experiencing battery heating.
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ROOT has nothing to do with battery life END >>>but it did enable you to use SetCPU .
jje

I9100 CPU is smart enough to change it's state when needed, you don't need an additional 2US$ software for that, when will people agree this fact? Anyway, why shall I care!

I'm also in the camp that thinks setcpu is a myth for saving battery. The cpu already scales up and down as needed stock. At idle the cpu sits at 250 mhz.

SetCPU
I found out that setCpu actually drained my battery faster, so just uninstall it.
See if it gets better.

My battery drains too.
Solved that problem by charging overnight.
Sent from my GT-I9100 using xda premium

There are many factors that's can cause battery drain, wakelocks, signal strength, method of data wifi or 3g, display etc etc
You could have a rouge app that is keeping your phone awake, download betterbatterystats and check for partial wakelocks.
Signal strength can be a factor, see your current signal strength and then change the modem to see if this reduces.
No need to tinker with setcpu, you can underclock if you wish but generally leaving it on stock is fine.
Most importantly enjoy the phone don't get to obsessive with trying to save every ounce of battery its a smartphone at the end of the day otherwise we'd be carrying Nokia 3310s with us, and remember you can always charge nightly!
Sent from my GT-I9100 using Tapatalk

Things that drain the battery :
Gps
Bluetooth
Wifi
Life wallpapers
Display brightness
Display time up setting
Try to configure them and see how much you can squeeze that .
Check on setup battery the top ranking of battery usage.
This is mibe so you can compare :
Regards.
Sent from my GT-P3113 using xda app-developers app

See my screen time above. I feel its pretty good. 6hrs+
I underclocked to 800mhz, auto brightness, ICS stock rom with the famous KH3 modem. The phone looses 2% over 8hrs of deep sleep. I think thats awesome. My phone lasts for at least 13hrs. (I charge it overnight and take it out @ 6am and use it till 11pm.)
Off topic: I was using my dad's iPhone 4 for a while and the battery life is amazing. But I still hate iphone.
Sent from my Bathtub using bubbles

poch_1421 said:
hi guys, i'm a newbie when it comes to rooting and stuff
i reduced all my lcd settings (display is only at 10%, removed animations, etc), turned off unecessary apps (wifi, etc) and i'm using setCPU (so i could downgrade my cpu speed) after i learned how to root here with the ff settings:
cpu range 200-500 mHz, conservative.
my phone still seems to be draining fast. i'm not watching vids or playing games.
can anyone help me or give me tips which overclock actually worked for their S2?
i was hoping my battery would last about a day.
thanks!
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since you are rooted, try flashing jeeboo kernel
other tips, if you are not using Google Now disable it, freeze samsung push service, settings -> wifi -> advanced -> network notifications - uncheck.