yashsingh1/xdaforums huggingface dataset:
[Galaxy S II General] AndroidGX:
Yeah, probably one of the best battery saving tips ever :D thanks for testing.

But forget sunshine condition.. :(

Can you do a test with "Auto adjust screen power" ON/OFF ?

Settings > Display > Auto adjust screen power > [TICK]​

Would be interesting to compare it, with auto-brightness setting on ;)

If you do it, your stats are much more precise than mine, would be nice :cowboy:
[Galaxy S II General] fida khan:
+#9900# should work . It works in my UK stock ICS. But I've noticed that disabling fd doesn't make any difference in ICS. In fact I feel it's better if it's not disabled. BIG TIP ABOUT FAST DORMANCY. IT'S SUPPOSED TO MAKE THE PHONE GO FROM A FAST DATA CONNECTION TO A LOWER ONE IN 7 SECONDS AFTER THE PHONE DATA CONNECTION ARROWS STOP FLASHING. ONCE MORE : When you're using data and the internet page or whatever come in your screen the data ARROWS will stop doing after 4-5 secs. AFTER they stop flashing your phone will go into a LOWER data idle connection ie H+ will change to H only.In FD enabled this should be in 7 seconds if your network supports FD. OBVIOUSLY THE QUICKER your phone goes into data idle mode the more battery power is saved- that's the main idea of FD. The time it takes for that change to idle and to a lower data idle connectivity is determined by your phone network provider (if your network supports FD) , then that change to idle mode for data will be 7 secs otherwise in GB it was 15 to 21 secs. But I've noticed that in ICS is 7 secs no matter if FD is disabled or enabled. Hope this helps and check it AFTER the data ARROWS stop flashing. In ICS it should be 7 secs to idle and to a lower data idle H+ to H etc. This should help people to understand FD and hopefully quell any fears (in ICS anyway ) . Ps don't forget the thanks button... wink ..wink.
[Galaxy S II General] fida khan:
My above reply is for the guy who wants to know how to disable FD. in ICS is not needed not on my g note UK stock ICS anyway.
[Galaxy S II General] pbenoit:
Great tips

Thank for these tips.

I've used this settings on a lithning rom with Phenomenal5.5Extreme Kernel.

I'm using greenpower (i disable it when i need to use maps with GPS on).

Before this tuning, the phone had to be charged every day, and now, it's every two or three days.

Thank a lot, it save me buying useless bigger battery.
[Galaxy S II General] It_ler:
Oh sorry, I have missed your suggestion.

Now I am testing Shun Andromeda 1.8 kernel.

I try to remember to test this option next time, when waiting for new kernel versions :fingers-crossed:
[Galaxy S II General] C56X:
Battery life

Is Android Assistant worth installing?

Is it better to select brightness to AUTO or manually adjust it to the lowest level (that makes the screen readable, of corse!), when out in bright sunshine?

Does Power Saving mode help any? What modifications does this selection make?
[Galaxy S II General] AndroidGX:
No worries, I don't take a look at my thread very often : just saw your answer right now ;) ok, I will wait your thinks about it :)

It has nothing to do with battery saving, no worries about this.

If you set to auto, it will drain more.

Never used this, but it can helps in some way, but this thing didn't revolutionized the world anyway, as it purpose not much and basic options only. I don't recommand using it except if you go out without any charger for more than a day or two, could help a bit.
[Galaxy S II General] elbos2k:
In WiFi advance settings, will changing the frequency band effect the battery when you have WiFi enabled?
[Galaxy S II General] xelra:
No.
[Galaxy S II General] lyndasue:
:good:

Excellent, I will use each and every one of your suggestions.
[Galaxy S II General] Carson_ls:
Great battery saving tips :good: It's really work! :laugh:

Thanks for providing such useful info :good:
[Galaxy S II General] p107r0:
is it really necessary to fully quote very long posts just to express gratitude?
[Galaxy S II General] Nemtor:
Great thread, love it. :)
[Galaxy S II General] Aafi-rocks:
Hello all,

I am unable to run this command *#9900# from my phones dialpad.. when i DIAL the code the command does not execute.. in fact nothing happens after I dial the last #

I am using CM9
[Galaxy S II General] kamiar1:
is this one really useful for better bettery life???

*** Settings > Display > Touch key light duration > "Always OFF" ****

....

i think touch keys dont use even 1% of the battery.

---------- Post added at 06:31 PM ---------- Previous post was at 06:19 PM ----------

it only works on stock samsung ROM.

dont work on miui too.
[Galaxy S II General] AndroidGX:
Exactly.

Thanks guys for showing me your gratitude ! but without quoting the whole thread it would be better :good:

It's better for other people visibility and avoid "spam" ;)

It uses a bit more than 1%, but not so much. Anyway I think it's useless when you know perfectly your device :cool: that's why I advice anybody to turn this feature off.

By the way my thread concern ICS 4.0.3, since I migrated to the international Galaxy S3 recently, I can't test GS2 4.0.4 roms anymore, same for futur CM9 final release. I will precise it right now on OP.
[Galaxy S II General] frenchiiiiii:
thanks for the thread :good:
[Galaxy S II General] kamiar1:
yes you are right, its useless when you know device.

ok, ill heed your advise.

thank you.
[Galaxy S II General] XDA_Mod:
Even if it's just 1% its a valid optimization.. More when u don't need too see those buttons Cuz u already know them by far..
[Galaxy S II General] Aafi-rocks:
Quote:

Originally Posted by Aafi-rocks View Post

Is there any other way to access these options ?
[Galaxy S II General] XDA_Mod:
I can't find it in CM7
[Galaxy S II General] Abstrak30:
Thanks appreciate all the helpful tips
[Galaxy S II General] XDA_Mod:
better battery life using CM 7 (gingerbread) or using CM 9 (ICS)?
[Galaxy S II General] ahmedassim:
In order to deactivate HSPA in Galaxy S2 on ICS 4.0.4, I used *#*#301279#*#* which worked fine
[Galaxy S II General] Lownita:
Wouldn't it be a good tip to disable HDSPA and only using UMTS instead? Bandwith should be good enough and enhances battery very much!
[Galaxy S II General] acikmese:
Thank you for helpful post.
[Galaxy S II General] samsungandriod:
i installed 'battery defender' which allow you to set day and night (sleep time) to reduce battery consumption. since i am an moderate user. and i set the night time 18:00 to 08:00 ( which turn off the 3g) and day time ( which only turn on 3g in every 15 mins).

if you dont want auto check emails or things like that, you can set sleep time to 24 hours. this will allow the 3g only be turned on when the screen is on so you can manually check your email etc.

i have used it for more than a week. it simply double my battery time

i found it is the most effective app for battery saver.....
[Galaxy S II General] daciangeorge:
Portal Rom is very good abount battery saving
[Galaxy S II General] ajayfafu:
Thank you mate....

really helpful...
[Galaxy S II General] johanlh:
Nice thread, by the way I am using this App called ShutUpBatterySaver v0.2, who shedule the AutoSync option every 30 mins during 2 mins. Recommended
[Galaxy S II General] AndroidGX:
This looks pretty interesting. Long time I was waiting for this kind of app :)

Just downloaded and set, let's check the battery life with it for few days/week, if it's really useful and see a difference, I will add it to first post :good:

Thanks for the info.
[Galaxy S II General] dtrinh4000:
Is this what happens when my battery needs to be replaced?

Hi, not sure if this is a result of me flashing to the JB rom or if my battery is on its way out. i've had the original battery for little over a year. The phone gets charged to 100%, but when i unplug and actually start doing stuff like use web browser or gchat for about 10 minutes non-stop my service bar goes down to "no service (the X icon)" and then quickly powers off. when i turn the phone back on it doesn't stay on for more than 5 minutes. if i leave the battery out for 3 minutes then put it back in, the phone will stay on a little bit longer, the battery will read about 64%, but then if i try to go on internet or run speed test it will just power off. when plugged in, it's all good.

this is a battery problem and not a problem with my ROM's right? I went back to ICS and did a wipe in recovery mode but still same problems.
[Galaxy S II General] desmes:
It seems your battery can't provide the proper current needed for some higher power consuming tasks. That's what happens when a cell is at the end of it's life. It may show the specified voltage, when measured, but under load it could be dropping.

I think it's not a ROM related problem.
[Galaxy S II General] dtrinh4000:
yep. my battery was definitely at end of life as it had a huge physical bulge. purchased a new battery and everything is all good now.
[Galaxy S II General] lovegurulavdev:
battery life

i have bought a battery today not form service center but from a shop about 1400nrs = $14 average .. he give me warranty for replace till 6 month if it discharge fast

as today i fully charged till notification come out

then i start use it continuously till the end with wifi and chatting browsing in low brightness

it gives 7hr of life time with 4hr and 22 min of screen on time is this normal ???

or i should claim new battery as my old battery which i changed give me 2hr and 50min of screen on time i am on stock rom 4.1.2 ..
[Galaxy S II General] doctor_droid:
4+ screen hour time is good.. And is absolutely normal :) no need for a change
[Galaxy S II General] lovegurulavdev:
Thanks .. He said me it should give the backup as the day you bought your phone if not than replace it .. and i dont know how much my phone gives when i bought it :rolleyes: .. so 4+hr is good time :) i should keep it ..?

and one more thing i want to know .. i broke my charger so now i am using iphone 5 's charger usb duck to charger my phone through data cable and i read it description it says 5v-- 1amp .. it will affect the battery life ?? i should bought new charger or can use this usb duck ?? i am little bit confused and afraid if it will blast my phones battery as i know the charger in s2 supports 650 ma
[Galaxy S II General] Mureren:
Thanks for this guide :)

Sendt med højre Tommel finger.
[Galaxy S II General] doctor_droid:
I also use a 1amp charger since the very beginning i bought s 2... It still takes around 2.5hrs to charge and the battery is still fine...

And yes u should keep the battery ..;)
[Galaxy S II General] King18:
Thanks for that tips:silly:
[Galaxy S II General] lovegurulavdev:
thanks :D with omani rom it give me 6 hr of screen on time yesterday :D
[Galaxy S II General] doctor_droid:
Standard 1650mah battery or extended one??? Dont lie :p
[Galaxy S II General] lovegurulavdev:
standard 1650mah battery with UV of -50 to 200 and 500 mhz and -25 to rest ones

In omni rom with Gustavo(probably misunderstood spelling ) 0222 kernel :D . i continuously use my phone since unplugged only use Viber and messenger for chat it gives 6 hr and 8 min of screen on time :D i will show you if i again use my mobile like that way to chat with someone special :D
[Galaxy S II General] doctor_droid:
:eek: u can compete with moto g for the battery life.. I will try ur uv profile on stock rom and will let u know if there is any increase.. Was to afraid to uv... :/
[Galaxy S II General] lovegurulavdev:
moto g ?? idont get it .. dont afraid nothing will happen .. and i use the Darkness governer and I/O = Noop for ...
[Galaxy S II General] XDA_Mod:
can't set the profile for setcpu ON just drop it on DEVICE / SDCARD / pasted freely there but it's not cached by the app (I removed the .txt) tried reinstalling but nothing happens...
[Galaxy S II General] ritik jaiswal:
For more
[Galaxy S II General] romeowen:
thank you for the tips. it's very useful. :)

---------- Post added at 08:06 PM ---------- Previous post was at 08:04 PM ----------

btw, does anyone know where could I still able to buy a battery for SGSII i9100 ? :)
[Galaxy S II General] AndroidGX:
I gonna do some tests for few days (maybe weeks) without JuiceDefender app to check the difference. Stay tuned.
[Galaxy S II General] Tinderbox (UK):
How well does JuiceDefender work without root?
[Galaxy S II General] IIIPowerIII:
That what im doing. Turning my wifi/3g off when I turn off my screen. I just reenable it when I wake up my cellphone again.

Ive unistalled JD, with it I never saw a better battery life. Best thing to do is UV with setcpu, youll gain alot of battery life.
[Galaxy S II General] hutzdani:
. . . you do know it uses more power to switch radios on and off again every time you power your screen on ( Same theory as Leaving the lights on in your house all day vs turning them on and off as and when you need them - Drawing more current to switch on than run constantly )

as for using WIFI, most places i go here in the UK the WiFi is worse than the 3G coverage, well except for business connections / my own home connection.

Better of just stop worrying about stuff just run what you need turn the screen to auto brightness only sync what you need and have a decent screen timeout set.

All task killers are Ballcrap, hell if you have to run an app to manage turning wifi / bluetooth off because you to darn lazy to do it your self you should not have a smart phone. . . and running an app to manage this uses CPU cycles and more power just to do the stuff your to dumb / lazy to do your self.

SIMPLE option - Switch off stuff you don't need when your done using it !
[Galaxy S II General] angelomaldito:
Well, I strongly disagree with everything you said. In your view, I'm too lazy/dumb and don't deserve to have a smartphone because I use JD to automatically turn off Wi-Fi and 3G while I'm not using it.

However, by my own experience using my phone with Wi-Fi on all the time consumes much more energy than turning it off automatically with JD - almost the double, to be more precise. I have the phone since May, and I've using JD for just over a month. At the begining I used to leave the Wi-Fi and sync on all the time, and when I started switching it off manually my battery life doubled. After I started using JD to do this for me, I haven't noticed any meaninful difference in battery life from when I was doing the stuff manually.

I know what I'm talking about, I've tested it myself: your theory that leaving the radios on all the time consume less energy than turning them on and off is completely flawed. It might work in books, but not in practice. Regarding the light in your home, it will depend on what kind of light bulbs do you use - the incandescent ones will not save you any energy if they're left on all the time.

Everyone knows what is better for oneself. I think one of the good things in having a smartphone is that it can do a lot of things automatically, as you program it to do. Using JD to turn radios on and off is just one of those things, while sync is another.

Does it make me a dumb who doesn't deserve to own a smartphone? Well it's just your opinion. I'm glad I don't need your permission to have one!
[Galaxy S II General] pik1:
This!

if I would get easily offended, I would be pissed now. thank god I really don't give a sh.. about your opinion, smartass...
[Galaxy S II General] ithehappy:
Oops, please delete this post. Wrong section.
[Galaxy S II General] jonny68:
Agree with all of this.
[Galaxy S II General] marvi0:
Was sceptical regarding juice defender, but yes must admit, it does make a difference in terms of battery life. I have the free version.
[Galaxy S II General] marvi0:
Lol i seriously can't believe how leaving the lights in your house is better at saving power than turning them off?. I can't understand that, seriously?.
[Galaxy S II General] chipwreck1:
Fast Dormancy

Disabling Fast Dormancy is not always a battery saver, this depends on your carrier.

If your carrier supports Fast Dormancy you should leave it enabled, otherwise it leads to more battery usage.

(T-Mobile and Vodafone Germany both support FD, e-plus does not)
[Galaxy S II General] dzontra11:
How i to know its is support or not....?
[Galaxy S II General] O and O:
Is that T-Mobile UK?
[Galaxy S II General] desmes:
How can one check if his carrier supports Fast Dormancy ?
[Galaxy S II General] AndroidGX:
Well, here again people are experiencing better battery life with disabling it in the majority, but you are true, it depends on every carrier aswell, so the best is to test himself which solution is the best.

Google is your friend ;)

I found that Orange (France) seems to accept it.

I'am actually doing some tests with and without, but I'am experiencing better battery life with disabling it, even if my carrier allow fast dormancy, so it's pretty strange.
[Galaxy S II General] androidkid311:
Huh? Hmmm i think that bln is better on battery than noled! im pretty sure of that. Tested them both :)
[Galaxy S II General] O and O:
Now that is interesting BUT for me the deal breaker is that it doesn't work with missed calls :-(.
[Galaxy S II General] TimmehPS3:
People from the Netherlands: don't install the "buienradar" app... It causes wake-locks and battery drain.
[Galaxy S II General] chipwreck1:
No, I meant T-Mobile Germany. I've got no information about other networks, but you can ask in their forums (or look via google).
[Galaxy S II General] chipwreck1:
Fast Dormancy (technical explanation)

This website explains en detail what Fast Dormancy is and what it's implications are:

mobilesociety.typepad.com/mobile_life/2010/06/umts-state-switching-and-fast-dormancy-evolution.html

(With just a few posts I'm not allowed to post links yet, so copy and paste above link)

Note: This is very technical, but the keypoints are that FD (correctly implemented) saves battery.
[Galaxy S II General] AndroidGX:
Tried to enable fast dormancy for few days now (appox 5), and I can't see any real difference, I guess it's very slightly.. but in favor of enabling it. So I gonna edit my first post on the way.
[Galaxy S II General] Perceval from Hyrule:
No, BLN doesn't work like NoLED. NoLED keeps your screen "on" (blinking every X seconds), to show a little icon on a black screen.

As it is AMOLED screen, black screen = black pixels, and on AMOLED black pixels are NOT consuming power (very cool thing !) because black on AMOLED is not powered.

But of course, as anything it will consume power, especially as it will run the backlight.

So... my tricks to get more battery :

* Use as possible black pixels (black wallpaper, black background for apps like Handcent...)

* Use SetCPU, and create a profile : "Screen off = 500 max, 200 min, on demand (I don't know for priority...)", and enable it - will enhance greatly battery. Do not set max to 200, it might crash the phone (just reboot in case of).

* Use airplane mode when you need it (no wifi nor network...).

* Kill/Block or delete Samsung apps you don't need/want (IMEI tracker, Apps, useless keyboards, etc etc)

* Use apps like Android Assistant to clean every X hours apps running in background, they can consume lots of energy, it will also speed up your phone by keeping RAM free.

About Fast Dormancy, as I remember it is only used in Europe, in order to keep cool GSM networks.
[Galaxy S II General] AndroidGX:
First page updated. Thanks Perceval from Hyrule.

I'am actually trying NoLED, with some nice battery friendly settings. Will report later if I recommand it... or not ;)
[Galaxy S II General] KennyLegend:
I like it. Doesn't seem to eat battery that much. I prefer it to bln cause I find the touchlight bln a bit dull compared to the galaxy s ( where I loved bln).
[Galaxy S II General] AndroidGX:
Ok tested NoLED since yesterday. Just uninstalled it.

It's almost pretty same as BLN about battery life, I get 8% draining in 1 hour, once a notification on screen. Thats why I will not recommand any of those wakelock apps :(

I will suggest to only use them if it's really important for some people to see notifications at one point, but nothing more.
[Galaxy S II General] KennyLegend:
That's a lot mate . I've got 6 sms notifications, and one missed call notification along with two phone calls and I've only lost 8% in 6 hours.
[Galaxy S II General] basim9955:
Nice Tips my friend .. I really have been using them for a while and the made a difference
[Galaxy S II General] holyguyz:
:eek: Holy! Really amazing! Don't know weither this coincidence or what. Disabling fast dormancy increase my Wifi signal (absolutely better than before). Before one bar only, but now 3 or 4-full bars. Thanks for the tips! :D
[Galaxy S II General] AndroidGX:
Hmm strange :(

Maybe could you share your saved settings to other NoLED users in manage attachments please ? will add it into first page with your nick ASAP. Thanks for them. ;)
[Galaxy S II General] BrandoHD:
There have been arguments put forward that state free ram is wasted ram, as constantly interfering with Androids built-ram management actually causes more harm than good...
[Galaxy S II General] KennyLegend:
I don't have any special settings mate. No battery savings turned on. Id get at least 20 sms s day !!
[Galaxy S II General] guidox79:
Thanks, I followed your advice, and now I can get in the evening.
[Galaxy S II General] jzmtl:
I've tried this, there's something weird about it. You would think the black part should simply be pixels not lighted at all. But I made an all black background in photoshop and used that as my lock screen wall paper, when I took it to a dark room I can see the "black" part of the screen is still slightly brighter than when the screen is off.
[Galaxy S II General] mi3x:
This is a great post that surely will make the difference! Should add some points to OP.
[Galaxy S II General] wolfbrigade:
I don't see any change in the battery life..
[Galaxy S II General] vrindamishra:
Amazingly helpful reply. Will keep in mind. Thanks buddy :)
[Galaxy S II General] Perceval from Hyrule:
LOL did you forget your screen is backlighted ? ;)

A black pixel consumes nothing on AMOLED, but a "used" pixel (any other color) needs power to work. Whatever you do, backlit is on when you use your device, as far as I know you can't entirely turn it off - I've tried, and the phone is totally unusable. And, yes, backlit uses lots of power... But you should gain extra lifetime by using as many black pixels as you can.

Good link to compare AMOLED and (S)LCD screens : http://smartphoneblogging.com/2010/...d-showdown-which-screen-technology-is-better/
[Galaxy S II General] mattyboyo:
That link talks about super amoled (galaxy s) not super amoled plus (galaxy s2) so the problems with the green sub pixels and the pentile matrix don't apply.

http ://www .oled-info.com/super-amoled-plus
[Galaxy S II General] jzmtl:
To my understanding the AMOLED pixels are individual tiny LEDs thus self lighted, negating the need for a back light. Thus if pixel is not in use it should not emit any light?

Even in your link the article state as such, that amoled pixels are self lighting.
[Galaxy S II General] siebenhundertzehn:
Well, this information is not correct. See here: http://xdaforums.com/showthread.php?t=1124669
[Galaxy S II General] Timi91:
You can froze some applications thanks titanium backup, (it avoids to uninstall, and you can enable it when you want), i think about samsung apps (wifi share etc)..
[Galaxy S II General] AndroidGX:
Interesting,

I agree that I was wrong, it's good to know what this option was hiding :)

If I understood this thread well, it seems that if we let the option unticked, it consum less battery because more brightness, so I won't modify my tip on first page then.

Thanks for the link !

As for apps freezing solution, it's preferable to remove apps who (are supposed to) drains in the background (like Samsung Apps, Social Hub, etc..) before flashing a rom.

This link is my favorite to know (about system apps, samsung integrated apps, etc) if safe to be removed. ;)