yashsingh1/xdaforums huggingface dataset:
[Galaxy S II General] njaywtf07:
No, you just need to do this if you think your battery needs re-calibration. :)

By the way, when you flashed a new rom/kernel please do a few cycles of discharging and recharging first.
[Galaxy S II General] Kevin.Ranara:
Helpful post.Extended my battery hours. Thanks! :)
[Galaxy S II General] Obagleyfreer:
I'm not doubting this works, in fact I tried and it did seem to give me an improved battery life.

However what I find weird is that when you first buy your S2 it is in the box with no battery in it, the battery is about half charged.

So when you put the battery in for the first time wouldn't this re-calibrate your phone to think a half charged battery is a full one?

Why hasn't Samsung put this re-calibration method in the manual?

Surely they should say "when first using your phone charge battery up to full and then remove battery for 3 minutes and re-insert"

I just find it odd.

Having said all that your method did seem to work for me when I flashed a new ROM so thank you for the tip!! :)
[Galaxy S II General] joker97:
Thanks!
[Galaxy S II General] screenager:
i have a question regarding the lifetime of the stock battery: my device is now 13 months old and iam beginning to recognize that the battery doesnt last as long as it did before - could this e sign of the battery coming to its end? i never calibrate it or took care of it in any special way. thx
[Galaxy S II General] anime76:
Interesting. Thanks for sharing, will give this method a try soon.
[Galaxy S II General] jajal2:
how about unreplaceable battery?

Thanks
[Galaxy S II General] ram3n:
AFAIK, we are only talking about GS2 battery which is absolutely replaceable. (unless you've got a fake one :rolleyes:)

Other phones are not supported.

Cheers'

Sent via my s2 monster
[Galaxy S II General] testadeferro:
That´s the only way it works, I had a galaxy tab and it was the same, but on the device it was a bit complicated because you need to open the tab.

And in the tab only worked with a 5 minute wait before the chip goes completely off. I think it´s in almost samsung android phones and tabs.
[Galaxy S II General] douglasfneves:
I will give it a shot and provide you with my feedback.

DFN
[Galaxy S II General] Mr. AOTR:
Testing on my own device and will provide feedback upon the next few days.

Do you think external conditions might affect battery performance? I have my device protected by a soft rubber skin, but it became so hot at times while charging and using high-performance apps that I carved some cuts on the skin, which helped to diminish overheating. Also, local weather is usually hot and dry in my location (León, Guanajuato, México, central México), lately I have experienced low battery life which is strange since my device is about one year old, and now I don't get as much standby time as it used to provide to me.
[Galaxy S II General] Mawdo:
This is the most useful thread I had ever read on this forum, and after reading the first stupid and dumb comments, I almost kept away from trying this but I gave it a shot because of its have nothing to lose, but this make my phone completely different :) it looks like I bought a new battery and I'm still using the same old battery, thanks guy, you're my hero:thumbup::thumbup::thumbup::D

You can see my phone is a Nexus and it works :D
[Galaxy S II General] worf_1977:
Hi all!!!

I've been using a 2000Mah power pack, anda althought that i'm more satisfied with it's performance, it doesn't have the one that i expected from it.

Discharges so quickly that i did not noticed an improvement alongside the standar battery pack.

Is it normal?

ADDENDA: i performed a battery fuel gauge chip reset under ExTweaks app. It counted 80%, and was changed for the 2000Mah pack.

Thanks in advance and for your attention!!!:laugh::laugh::laugh:
[Galaxy S II General] codestorm:
Very helpful indeed, thank you mate !!
[Galaxy S II General] FirebirdStud:
Cant wait to try this. The battery is definitely the only downside to this phone.
[Galaxy S II General] soriaedu79:
S.O.S

Hello guys,

I'm a little bit desperate with my battery. One month ago I updated from ICS to JB in my s2 i9100 and the horrible loop started:

- Between 100-70% of charge everything is going more or less ok

- Suddenly, phone turns off. After restarting battery is around 40% and very unstable

- Now it's even worst, without charger phone is up only 15-20 minutes.

I tried EVERYTHING:

- All the roms for JB (all versions of RR, Paranoid Android) with all the combination of Kernels (CM10, Siyah and Dorimanx)

- Go back to ICS (of course, for every ROM I give to the phone 2-3 days to stabilise it)

- Battery calibration tools of the play store (even I paid 3$ for one of them)

- Battery calibration without being ROOT (the trick of this thread did not work. I tried 3 times)

- Reset fuel gauge chip from the ex-Tweaks

...

Any other idea/clue?

I'm about to give up, I think I'm going to get a new battery. I prefer to pay 15-20$ than spending hours trying to figure it out.

The last question. I'm assuming that a brand new battery will fix this problem. Am I right? I'm afraid of buying a new battery and facing the same issue.

If I get a new one I am supposed to do some operation on the phone before to install it?

Currently I'm using RR 3.1.1 with dorimanx kernel.

Thank you very much in advance!*

You guys do an AWESOME job with this forum.
[Galaxy S II General] astrogambit78:
Good day mate:)

ok , im not an expert but i can give you some pointers to look upon:

1. did you change settings/values in extweaks? if yes, you can reset them

2. I don't know if Battery calibration apps (paid/free) really works:confused: thats why Mr. Ram3n made this thread;)

3. how old is your S2?

yep, if you buy new battery and still have same issues then maybe you have problems in your S2's hardware (unless u bought a dysfunctional battery)

changing battery can be your last option

goodluck:)
[Galaxy S II General] laui888:
Thanks for the nice tip. Seems very logical! :good::good::good::good::good:
[Galaxy S II General] dalya:
very useful tips..:)
[Galaxy S II General] ram3n:
Hahah nice to see my old trick still working perfectly.

Almost 200k views!

Thanks and cheers guys :)

Sent via my s2 monster
[Galaxy S II General] astrogambit78:
@ ram3n

Yes mate and i still follow your procedure everytime i flash a ROM

thanks :victory:
[Galaxy S II General] dalya:
+1 :thumbup:
[Galaxy S II General] Slouzbry:
Works great, thanks a lot !
[Galaxy S II General] icebryanchan:
Thanks! It helps a lot. ;)
[Galaxy S II General] narco14:
thank you for this thread man
[Galaxy S II General] winterhope:
Thanks for this great thread! =D
[Galaxy S II General] ekaz:
It really works! Thank you!!!!!!!!!!!!
[Galaxy S II General] ram3n:
So many Thanks ! Ha ha ha

Big up guys :)

Sent via my s2 monster
[Galaxy S II General] carbonhawk:
works well for me, I think it's due to the "pray battery God" part
[Galaxy S II General] infamousayaz:
100% signal

Thanks for this nice post . . but how do we cme to know tht we are getting 100% signal . . i have tried many other ways to calibrated the battery . .but none of it works . . ...pls help ......if u can pls upload screenshots. . wil be really helpfull . .

---------- Post added at 06:14 AM ---------- Previous post was at 05:25 AM ----------

Thanks for this nice post . . but how do we cme to know tht we are getting 100% signal . . i have tried many other ways to calibrated the battery . .but none of it works . . ...pls help ......if u can pls upload screenshots. . wil be really helpfull . .

---------- Post added at 06:26 AM ---------- Previous post was at 06:14 AM ----------

hi.as your screen shot says tht 4 hrs of screen time ,thts nyc . bt mine is giving the same ..bt its not calibarated coz , just now b4 switching of my s2 my battery was 24% and when i rebooted it was 28%..

pls help . .i really fed up ?
[Galaxy S II General] Doublewise:
Hi please someone share what is minimum mV before phone shut down on stock battery?

Thanks
[Galaxy S II General] dar74:
My battery (original) drains even wen the phone is off. First i tought that my battery was broken. I bought a new accu (original) but i got the same results. After about 8 hours ive got 15% less juice and the phone was off. What could this be?
[Galaxy S II General] xianlong89:
thx 4 sharing~ :)
[Galaxy S II General] Magpir:
the the OP is right i have been using this technique on my HTC windows phone for quite some time now

i discovered it myself some time ago..
[Galaxy S II General] Alyseon:
Its best of you download betterbatterystats and see if you have any wake locks occurring, if you do have problems, send screenshots to BBS thread and they will help you there.

Device: Samsung Galaxy II i9100

ROM: NeatRom Lite 4.0

Kernel: Jeboo 1.0d

Modem: LS6

I'm a guy if people are confusing me as a girl :D
[Galaxy S II General] Magpir:
this method will work in most phones that have a li+ion battery .
[Galaxy S II General] pandalow:
Is it important that you pull the battery QUICKLY?

and

What is "cycle of fully charge/discharge to ~15/20%" <---- what i have to do? My english is to bad to get it ;) Can anyone translate it in simple english for German people? :)
[Galaxy S II General] nitroman59:
And "Merci" :good:
[Galaxy S II General] pandalow:
?

Gesendet von meinem GT-I9100 mit Tapatalk 2
[Galaxy S II General] daimler1727:
I have been subscribed to this thread for as long as I can remember. I have been reading it too from time to time but I never bothered to really try it. Yesterday, I got really curious that's why I got the itch to try it on my S2.

On my first try, I got frustrated because as soon as I finished the procedure, I got 99% after reboot and my phone's battery was draining really fast (like 8% in less than 20 minutes on standby). Then I recalled from my reading that my batter had to just make cycle. With that, I just kept on using it all day, playing games to drain it quicker, etc.

When the time came that I had to recharge it, I turned my phone off, plugged it and repeat the process again. After getting 100%, again, I followed the procedure mentioned and voila, I had 100% batter after reboot. I never thought that would be possible as someone mentioned that reboot will really take some juice off. I knew it was working because I only got 2% drain after 5 hours of standby... :)
[Galaxy S II General] EB10000:
I really can't believe XDA put this stupid thread as a sticky reference.. This procedure will do nothing to your phone nor the battery.. taking the battery of for over 3 minutes will only reset the bat stat file.. This will actually screw up the calibration rather that fix it.. The calibration is a continues process of voltage monitoring vs time of usage. This data is gathered by software into a statistical file that will help the phone estimate the actual battery % mAh left.. If you delete the bat stat file, you need to recalibrate by full charge and then allowing full discharge cycle to allow new stat data to be collected.. the problem is that Li-ion bats do not like full discharging cycles as this will shorten it's life and screw up performance...
[Galaxy S II General] Thisnameisepic:
Thank you so much about this. My GS2 battery was seriously uncalibrated. This method fixed it and it's so simple!

Sent from my GT-I9100
[Galaxy S II General] Magpir:
this does calibrate the battery. I use it all the time on Windows Phone
[Galaxy S II General] Dexter_prog:
can I be sure if this worked if after removing the battery and putting it back it my charge still remained at 100%? I thought it was supposed to decrease a bit?
[Galaxy S II General] xacobe97:
Yay! it worked :) thanks man my battery life is now pretty longer.
[Galaxy S II General] keroro185:
Is resets the chip inside the phone right?

what if I have two different batteries? Say if I calibrate one, use it till it's drained, then replace it with my spare battery. Will my phone become inaccurate again?

Cheers
[Galaxy S II General] s2fanboy:
To be very honest i cant see any difference. . Battery life is just the same as it was. .

But neways i thank you for your efforts. Keep up the good work. .
[Galaxy S II General] shmp30:
Thanks, Helped me.
[Galaxy S II General] Yazbulls:
Many thanks XDA

Tried the method suggested. Struggled at first to get the phone to stay of when charging, but once it did, I pulled the power chord and battery as suggested, and it now like having a new phone!

I had searched for remedies after noticing that my 2 moth old Galaxy S2 had dropped from 100% to 55% overnight, 8 hours of it and I being alseep! Now, in the same period it shows 98%.

With light usage (effectively on standby) it has dropped to 80% in a 24 hour period potentially giving 5 days standby. Moderate useage for me (others might consider it light) and it still only dropped to 70% across 24 hours.

Just hoping it will stay like this and I won't have to keep messing about with it!

Thanks again.
[Galaxy S II General] One B&G:
Nice sharing.;) and thanks for the tips.
[Galaxy S II General] buzzing_bee:
I've tried the method at the first post:

and for the first time, it works like magic, my battery is no longer draining.

but after one day using..my battery is draining again.

I re-callibrate it once again, but nothing changes

is there something i must do?? or should i change to new battery??

thanks before :)
[Galaxy S II General] inoe_day:
Im not sure to calibrate is the best way but we all know Android gets a bad rap for being a power hungry operating system, and it can be if left unchecked. However, by shutting off applications that aren’t in use and only turning on Wi-Fi, Bluetooth or GPS functions when needed you’ll be amazed at how much longer the battery lasts.

Under average usage your device should easily last all day, and maybe then some. Of course, if you stream Netflix all day then bets are off.... its just my opinion :)
[Galaxy S II General] Alyseon:
My advice for better battery life is to calibrate battery using Ram3n's guide and then use this guide by bobdoblo for better battery life:

http://xdaforums.com/showpost.php?p=35061392

Signature:

Device: Galaxy S2 i9100

ROM: NeatRom Lite 4.1

Kernel: Dorimanx 7.46 (Performance Profile)

Modem: LS6

Mods:

-AllianceMod

-Aroma 4.2b (Note 2 gallery & swipe keyboard)

-MediaScannerFix by Rushabh25

-NeatRom Bootlogo

I'm a guy if you guys are confusing me as a girl :D

(╯°□°）╯︵ ┻━┻

┬──┬◡ﾉ(° -°ﾉ)

(╯°Д°）╯︵/(.□ . \)

- 깔끔한 로마
[Galaxy S II General] Magpir:
I don't think so. The calibration, is about the chip inside the battery. The Os reads that value to decide the level of battery left
[Galaxy S II General] Mopral26:
works perfect for me thx before my s2 lost 30% by night (8hrs) and now 4% in the same conditions/time.

very good idea this post.

but, when i put the battery after 3 mn, my s2 won't boot, black screen and nothing else, i plug charger i have a grey battery icon withe a circle, battery green for 1 second, and it back to the grey battery icon, again and again, i unplug charger, i push power button and the s2 boot normally... what's the problem?

crazy no?
[Galaxy S II General] gastonw:
someday we'll get 1-charge-a-month battery and we'll also be talking calibrate so we can make it last a month and a half.

Sent from the little guy
[Galaxy S II General] 0BEK:
nice tuts .. i will try ;)
[Galaxy S II General] dwie:
I have few questions regarding this.

1) Do I need to wait till I get low battery before I start all this or can I just start with step 1 anytime?

2) Since I have two batteries and switch constantly between them, do I need to do this everytime I change battery?

Thanks in advance!
[Galaxy S II General] domii666:
Thx for the Tipp! I will taste it!
[Galaxy S II General] gastonw:
Tell us how it tastes like then. :D

Sent from the little guy
[Galaxy S II General] cobra-mr:
crisis maything

Thanks
[Galaxy S II General] dwie:
I bought a new battery for my S2 and I was wondering if I needed to do this before using it. According to this I should apply a "topping" before use. I don't know what they mean with topping though :confused: any help?
[Galaxy S II General] shindatuin:
Charging the phone for 12 hours. That's what it means for topping. After topping. U can regularly charge it to its normal battery charging time about 2.5 - 3 hours.

It must be turned off anyways
[Galaxy S II General] CrabNN:
can i discharge the battery to 0%? or 15-20% instead?
[Galaxy S II General] ohynek:
You actually can not discharge battery to real 0% because phone automatically shutdown before that. If you totally discharge Li-ion battery you can destroy it or shorten battery life.
[Galaxy S II General] amoldalavi:
I have problem with my Galaxy S2 I9100G fuel gauge.

It is reporting 35% less SOC always (Confirmed by using same battery in other Galaxy S2). So I can charge my phone upto 65% max

Ultimately my phone's fuel gauge is reporting actual 100% SOC as 65%.

35% battery charge is unusable.

I got into this problem when I flashed JB XXLSR ROM using Odin3 when my battery had 55% charge.

I tried to reset fuel_gauge but no help, after reset and relearn cycle in relaxed mode it can reach upto 65% only.

Now I am running CM10.1 custom build using instructions from wiki[dot]cyanogenmod.org/w/Build_for_i9100g

I came to conclusion that my fuel_gauge max17040 gone completely in wrong state by debugging driver as mentioned below

github[dot]com / CyanogenMod / android_kernel_samsung_t1 / blob / cm-10.1 / drivers / power / max17040_battery.c

My question is how I can get the factory default state of max17040 fuel gauge since reset didn't help me.
[Galaxy S II General] Bilack:
Have tried this method and some others, even apps, but without noticeable results. But as long as it lasts me through the day i'm all fine. I charge it every night anyway.
[Galaxy S II General] Kevgretor:
Nice way to calibrate batteries...thanks!
[Galaxy S II General] mortallkombat:
guess this should be a good way 2 caliber ate d battery....d new cwm doesn't hv d calibration anymore
[Galaxy S II General] xdalexder:
Pulling out battery

This is like the pull-out method of battery calibrations :D :cowboy:

:good: Thanks mate; been messing with custom roms (bad builds) and i ruined my battery, so i flashed a stock 4.1.2 and got a new extended battery, and i needed to calibrate it without going back to rooting my phone. Hope this gets it done ;)
[Galaxy S II General] gorandroid:
After this procedure my battery seems worst, from 100% jump to 92% In couple minutes...?
[Galaxy S II General] 100janov:
+1
[Galaxy S II General] Bakus2010:
Will it work on sgs advance?
[Galaxy S II General] testadeferro:
So far tested on many Devices successful. And you can allways do it by yourself and leave comment here so others can learn from you. Cheers.
[Galaxy S II General] mortallkombat:
Does this really work
[Galaxy S II General] Dexter_prog:
not really
[Galaxy S II General] rahulchauhan700:
Dorimax kernel could be an option !

Didn't worked for me !! :laugh: but i did it by changing the stock kernel with dorimax kernel . Just push the "Reset battery gauge" and you are done ! .. (If you are good at playing with roms and kernels then try this option in dorimax kernel )

Note : This method is only for experienced users . Do it at your own risk :good::cowboy:
[Galaxy S II General] AlanRubio:
Do I have to do it every time I charge my phone or once in a while or just once?
[Galaxy S II General] rahulchauhan700:
Only when you change your stock battery with an extended battery or sometimes with a new rom !:)
[Galaxy S II General] Toadyus:
I will give this a try my battery is on it's way to heaven as I seem to get less and less use out of my phone everyday!
[Galaxy S II General] Dead Silence:
Procedure does not work for me. When charging to 100% and removing the cable results in drop to 98% again.
[Galaxy S II General] zekenka:
tryed it but it is rather hard to understand if it really worked or not... any tips for me how to compare with an app or some cfg file that i can create with BBS?
[Galaxy S II General] cowen2006:
Never worked for me :(
[Galaxy S II General] deaddead:
I try 2 times, but it's not work :crying:
[Galaxy S II General] kokesh:
... ah those Battery calibration tricks... delete battery stats, etc. When will they die? I guess never. Please beware: if you do 91 seconds, your battery will be overcalibrated and your phone will stop discharging! FOREVER!
[Galaxy S II General] zekenka:
Lol. I think the 180s rule is just to be sure that your phone has completly powered down
[Galaxy S II General] ebraga80:
well, in my case I think I have a phone/battery problem. did exactly what you suggested but looks like my battery is dead/broken... my phone keeps turning off (display blinks and then goes black and after restart, it freezes or dies after 2min of usage). I really hope a new battery will solve my problem. If not, I'm done. My warranty expired on 15th Sep
[Galaxy S II General] - Fabio -:
I know that ;)

I was just answering Pfeffernuss' post, just above mine :D
[Galaxy S II General] justbenice:
before doing this calibration way i drain 10% in 2 hours, and now it drain .. 1% in 2 hours. Love this !
[Galaxy S II General] almorsol:
I tried this.

Should I leave the phone to uncharged completely after this? Reach 0%?
[Galaxy S II General] carotteman:
I will try that this evening.

Come back later for feedback.

I'm on revolution 2.7.1.
[Galaxy S II General] justbenice:
Nope, you do not to do it, just turn your phone off, plug in charger, wait till it show 100% , unplug charger, take out the battery for around 3-5minute, then put your battery in , turn your phone on. Very easy and kute way to calibrate your battery!!!
[Galaxy S II General] Jal253:
Hi,

I'm gonna give a try, my battery is only going up to 4185 :confused:

_____________________________

Leo & Check's CheckROM RevolutionHD V1.0
[Galaxy S II General] Universeal:
Kinda too late. I just root my phone and use battery monitor to calibrate it. Now i hope i will get again 4d+ of battery life time. If not i hope i didn't mess up the battery calibration settings. On next firmware upgrade i will try your guide and see how it will perform.
[Galaxy S II General] TECK:
I never did any of the above and my battery is tops.
[Galaxy S II General] Universeal:
On what firmware version you are?

I used to have that lifetime on OXX KI2
[Galaxy S II General] TheSaw:
Agreed.

10