yashsingh1/xdaforums huggingface dataset:
[Galaxy S II General] fallenraven75:
you are clearly using an extended battery. nice try

---------- Post added at 01:18 PM ---------- Previous post was at 01:12 PM ----------

when u unplug your cord the energy within the battery is no longer 100%. think about it. the only way it would remain 100% full is if it were not being used at all. and the fact that u r using it to power the screen to read its percentage it will show 99%. its just more acurate than what u r use to. anything less than completely full is not 100%
[Galaxy S II General] Entropy512:
Just freaking ignore it... a 1% offset on a fuel gauge that most likely has 2-3% or more of error NO MATTER WHAT YOU DO is nothing to worry about.

Either that or you damaged your battery by "topping it off" one too many times.

Seriously - there is no reason to ever perform any "calibration" operation on the battery of any Galaxy S device - just freaking use your device. The ONLY time the gauge ever gets thrown off is when you reboot on low battery - so just don't do that, or if you do, plug it into the charger while you're rebooting.
[Galaxy S II General] Entropy512:
NO NO NO NO NO! A full discharge/charge cycle does NOTHING on ANY Galaxy S or S II device.

Stop applying HTCisms to Samsung devices.
[Galaxy S II General] Monh3:
Why is my battery voltage dropping after reaching 100%? it reaches 4188mV and then starts dropping even with the charger plugged! Is it normal?
[Galaxy S II General] Entropy512:
Lithium-Ion batteries don't like getting trickle charged - so at a certain point, charging gets shut off to avoid destroying the battery until battery voltage drops below a certain point. Then the charger is re-enabled until the termination cutoff is reached again.

This is normal, it's to prevent your battery from getting damaged if you leave it on the charger. (Still, even with this protection it's not ideal to leave the battery on the charger for long periods of time. This is why, for example, Ezekeel has a feature in his GNex kernels to cut off charging far earlier than normal if the user wants, and why my Infuse kernels would reduce charge current early so that it would hold at around 90% charge when using Google Maps Navigation.)

In fact I think I might backport Ezekeel's early termination feature to my kernel...
[Galaxy S II General] Vlad_z:
You probably don't care about Galaxy Tab 10.1 but just FYI sake:

http://xdaforums.com/showpost.php?p=16771651&postcount=41

yup, pulling out battery and wait enough time to allow internal circuitry to discharge completely will initiate fuel gauge chip's startup guesstimate procedures. Though according FG Model, to learn about particular battery FG chip would need to make second reading when voltage is well apart and battery is in rest state (voltage change is less then some mV per 30min ).

I am glad to see that all nonsense with calibration apps doing "calibration" by wiping batterystats file is in the past myths...
[Galaxy S II General] Entropy512:
Actually I own a 10.1 - It's interesting in that I was 90% certain the 10.1 had a different fuel gauge. If it's a MAX17042 - that's interesting as it is clearly using extra features in the chip that aren't used in the GS2.

Based on reading the kernel sources there - yup, that's it.

The MAX17042 is the same chip in the GS2 - except in our case, all of the current measurement/processing functionality is not enabled. In fact, at least one person somehow got info from Samsung indicating that the required support hardware for that to work was not even present.

In the Tab 10.1, if you look at https://github.com/pershoot/galaxy-2636/blob/master/drivers/power/max17042_battery.c , the current measurement functions are enabled and supported. If you look at the I777 version (identical to I9100) at https://github.com/Entropy512/linux_kernel_sgh-i777/blob/master/drivers/power/max17042-fuelgauge.c , you will see that all of the current measurement related items are not supported/not in use.

What will be interesting is to see if it is indeed true that the needed items for current measurement are not wired in I9100/I777, or if ICS will completely change everything regarding how our fuel gauge works.
[Galaxy S II General] Vlad_z:
Yup, I see... in I777 source code the only option to verify if hardware circuits are even wired is to look on raw registers dump at address:

CURRENT_REG	0x0A

but LOG_REG_FOR_MAXIM condition should be TRUE in driver

#ifdef LOG_REG_FOR_MAXIM

{

int reg;

int i;

u8 data[2];

u8 buf[1024];

i = 0;

for (reg = 0; reg < 0x50; reg++) {

max17042_read_reg(chip->client, reg, data);

i += sprintf(buf + i, "0x%02x%02xh,", data[1], data[0]);

}

printk(KERN_INFO "%s", buf);

i = 0;

for (reg = 0xe0; reg < 0x100; reg++) {

max17042_read_reg(chip->client, reg, data);

i += sprintf(buf + i, "0x%02x%02xh,", data[1], data[0]);

}

printk(KERN_INFO "%s", buf);

}

#endif

well, did you see something like this in kernel msg log?
[Galaxy S II General] bulldozer1210:
thank you

thanks

i will do this after i finish my work tonight.:)
[Galaxy S II General] deadbeat44:
Thanks. Will give it try. :D
[Galaxy S II General] ram3n:
Waiting for your (positive) feedbacks guys Im sure!

:rolleyes:
[Galaxy S II General] jacobrucia:
i'll try it
[Galaxy S II General] X-Plosiv:
Just did this, followed everything except I didn't turn my mobile phone off, i let it on, when it got to 100%, unplugged, turned off, removed battery, wait for 180sec, put battery back, on 100% after i turn it on.

thanks!
[Galaxy S II General] awaisuk:
So after I do this, and I get 100%, remove the battery and then put it back in.

Do I have to do this method again when my battery goes down to 0%? Or when it is around 10% and I want to charge it back to 100% again?
[Galaxy S II General] ram3n:
No, one calibration is enough.

After that, just use your phone as usual and let it "calibrate" itself.

Hope it will help you

Cheers

:)
[Galaxy S II General] kpyhere:
Any idea of how to reset or calibrate my battery ?

I have made a thread here telling what's my problem...

http://xdaforums.com/showthread.php?t=1548440
[Galaxy S II General] h33ro:
Great tips mate !!!

Many Thanks :)
[Galaxy S II General] rodrigo82:
I did this method, and after that, every time I unplug the charger, the phone thinks it's plugged. Says the massage of "full charge, unplug" (or something like this) and makes noises of plug and unplug.

I've try wipe battery stats but no solved.

Ps: Sorry for my bad English. Im from Brazil.
[Galaxy S II General] woshini:
Nice, it works on my S2 !

THANKS :p:p:p:p
[Galaxy S II General] evolart:
Best method!
[Galaxy S II General] kosako17:
i think that best app flor calibration is battery calibrator

Enviado desde mi GT-I9100 usando Tapatalk
[Galaxy S II General] alecao:
Yes. Here's the link for it for anyone who wants to try.

https://play.google.com/store/apps/details?id=com.nema.batterycalibration

But it needs root.
[Galaxy S II General] Garoto1973:
LOL I thought this post was kind of a urban legend or myth but I tried it and afterwards my idle drain went from 2% to 1% or less per hour. so this is great, nothing to lose by trying iy.
[Galaxy S II General] fida khan:
I've charged my stock gs2 Batt after about 6 months and when I put it in the phone it showed 86% . Why do Batts do that. Is it normal?

I did the procedure suggested ..
[Galaxy S II General] maksin01:
I've been reading a lot about battery calibration lately, and there were lots of different opinions out in the webs. However my friend keeps telling me that the S2's battery doesn't need calibration even after flashing roms..:confused: Is he right or wrong?
[Galaxy S II General] X-Plosiv:
From my experience, I did this just for any case, and since then I've been flashing around 10 ROMs. Didn't calibrate it, and battery is excellent.

Just went today to college to pick some papers, and get back. Approx 40min of playing music through PowerAMP. Came back, battery was on 100%, was :eek: :D
[Galaxy S II General] tommythere:
well, trying this method, is better than nothing at all :) thanks.
[Galaxy S II General] Hawlery:
i will try it, hope it works :D
[Galaxy S II General] ram3n:
Thanks for all your feedbacks guys :)
[Galaxy S II General] Kovacs-m:
great post, thank you
[Galaxy S II General] master_droid:
I'll try, thanks
[Galaxy S II General] Omega Frost:
With the power cord it was showing 100%, right after unplugging it jumped to 98%, nothing really bad actually, did the procedure and now it's showing 100% again. Curious.
[Galaxy S II General] nachzeher:
What ROM are you using?
[Galaxy S II General] thefern2008:
Is suggest, do a full cycle (0-5% to 100% charge) each one month, fo rbetter battery life.-
[Galaxy S II General] darkgoon3r96:
Thank you very much for the informative post.

Really appreciate that you took all the time to write this just to help us :)

No longer will I need for 3 charge "cycles" to go by :)
[Galaxy S II General] luisg0612:
How did you do that? Your battery life is amazing, i've tried to calibrate my battery but it seems it doesn't work for me. I haven't rooted my galaxy s2, so i can't wipe batterystats from recovery.

---------- Post added at 10:42 PM ---------- Previous post was at 10:22 PM ----------

Is there anything new about battery calibration? Something new discovered about this post? I think this method didn't work for me. :( does somebody recommend something to me? Sorry for my bad english and thanks a lot.
[Galaxy S II General] nrk_2k:
See my post above, battery calibration is not possible on the sgs2. No matter how hard you try, or where you look, you will never be able to as the hardware can not be recalibrated.
[Galaxy S II General] sujantdn:
wow! :eek: more ppl need to read this. Espicially those who complain battery problems just after few hours flashing new rom!
[Galaxy S II General] RS08:
Wow thanks guys, I wasted my time since more than 6month with the App. Finally a can do a proper calibration.
[Galaxy S II General] kosmos2012:
thanks

its a very good tip :-)

thanks
[Galaxy S II General] ram3n:
Thanks guys ! Hope you're enjoying your little S2 monster like I do :)

Cheers !
[Galaxy S II General] luisg0612:
I need help!!

sorry but my battery is draining a lot, i don't know what is happening! i've done your calibration tip, but it seems it don't work for me, can you help me to do a proper calibration? i did all step you wrote, can you explain to me again? sorry for my bad english, i think i'm worry, i just bought my galaxy s2 in march. i'm on XXLP8 FRANKESTEIN
[Galaxy S II General] emzero:
Those full charges in the cycle needs to be done with the phone powered off?
[Galaxy S II General] ram3n:
It's better with phone off. More accurate.

Sent via my s2 monster
[Galaxy S II General] Linuxx.:
Battery calibration on gs2 is useless. It does not require calibration as the other cell.
[Galaxy S II General] francys-t:
Quote Linuxx
[Galaxy S II General] luisg0612:
somebody can help me with my problem? thanks I would appreciate it
[Galaxy S II General] kushelmex:
Great tip. Thanks !
[Galaxy S II General] calanizzle:
Using battery calibration from play store got better results on my s2
[Galaxy S II General] nrk_2k:
Download BBS (BetterBatteryStats) and check the partial wakelocks and kernel wakelocks. a lot of people are having issues with battery drain on ICS. This is not due to calibration issues, ICS is just still beta releases on our phones. You CAN NOT change battery calibration as it is hard coded on the MAX17042 chip in the battery. This chip also CAN NOT be reset, as it is in the battery and draws power directly.
[Galaxy S II General] Archsider:
i did this calibration , but somtimes there is a huge batterie drain ! i have 40 ou 30 % , i reboot my phone and ... i hav 17 %... I don't understand.
[Galaxy S II General] blackknjght:
When i turn of to charge i won't know when baterry get 100% to pull off quickly ?

how to do ?
[Galaxy S II General] JJEgan:
Plug phone to charger let it charge to 100% remove battery 5 mins . Replace and charge to 100% .

baterry get 100% to pull off quickly

Frankly that and many other battery calibration tips are nonsense . Rule is charge the phone and use it battery is self calibrating .

jje
[Galaxy S II General] ram3n:
Easy mate. You'll see the battery icon with 100% After a vibration = time to pull off.

:p
[Galaxy S II General] ram3n:
Rather, it is quite interesting when the fuel gauge chip gets mad and excited after a flash or reboot. It becomes a good indication without any hurt and is simple as 1+1.

Cheers :D

Sent via my S2 monster
[Galaxy S II General] hyibin:
will try.
[Galaxy S II General] Theodhoro:
Thank you, nice and simple tip.
[Galaxy S II General] ram3n:
You're welcome.

Deux riz un l'ami ;)
[Galaxy S II General] ADX@ss:
Very usefull tips man !

Thanks for sharing !

bye +:D
[Galaxy S II General] Rooster19:
For the first step, can the battery be at any percentage (like 76% or 92%) or does it need to be drained, then charged to 100%?
[Galaxy S II General] ram3n:
Yup can be at any %. It doesn't really matter.

The fuel gauge chip will auto calibrate itself then.

:rolleyes:

Sent via my S2 monster
[Galaxy S II General] Rooster19:
Legend, thanks mate

---------- Post added at 07:30 PM ---------- Previous post was at 06:50 PM ----------

My phone randomly powers on when charging :/

How is this happening lol
[Galaxy S II General] ram3n:
You're welcome matey.

Anyway, this couldn't be my fault. :rolleyes:

Only your ROM and kernels responsibilities :p

Sent via my S2 monster
[Galaxy S II General] Rooster19:
Yeah mate haha no worries.

Must be my kernel maybe, will look into it!
[Galaxy S II General] ram3n:
+1

Yup must be your kernel issue.

I've already experienced the same problem long time ago with some kernels.. The only way to solve it was... To change for another one.. Or wait for an update ;)

Sent via my S2 monster
[Galaxy S II General] jr_718:
Can someone please tell me when I take my battery off the phone and put it back in the phone I noticed some lost in battery juice..

Hit the thanks button when someone(anyone)helps..:)
[Galaxy S II General] gamal001:
Ram3n.

We wait your script.
[Galaxy S II General] driton01:
Thank you very good tip.
[Galaxy S II General] ram3n:
Here you go guys :

http://xdaforums.com/showthread.php?t=1691129

Cheers :D
[Galaxy S II General] brentparky10:
a bit confused....?

Hi there, I am a bit confused as to what you mean by "Put back the battery on the right side?"

However I guess it means put the battery in, like it was before?.... Is that what it means?:)
[Galaxy S II General] ram3n:
Lolz, I probably wrote this after drinking too much Belgian Beers ;)

And BTW, YES, you're right and absolutely understood the sentence ! BRAVO :D
[Galaxy S II General] xelra:
What's written in the op is simply not true and just makes people that believe it dumber.

There is no way to reset or "unpower" the battery implemented chip.

No offense. Your other thread with the UV settings is nice, but this here is bull.
[Galaxy S II General] ADX@ss:
Lol, why you say that ?

It works also great for me ram3n. Your threads are very usefull for newbies like me :)

Thanks again for sharing
[Galaxy S II General] GPS_Music:
Hello,

Thanks for the tip!

I have the US version (i777) and am trying this out. I am running stock 2.3.6.

Question though, can I charge it wih the phone ON until it reads at about ~98% then turn it off and charge from there? Or does it have to be off the whole time charging?

The reason I am asking is that there is no numeric indicator when the phone is off, so I have relatively no clue how close to 100% it is.

Thanks!
[Galaxy S II General] sahibunlimited:
Wrong tab

Sorry
[Galaxy S II General] GPS_Music:
i realized that, sorry :(

may as well ask though, would this work on i777 (US AT&T) version?
[Galaxy S II General] flapdoodle:
didn't work for me

Hi, I did as per the instructions.

When I put the batter back in the battery charging pic show the battery at only about 60% full. So, I plugged it back in took about a minute to fully show 100% again followed instructions again. Same again about 60% after putting battery back in.

Turned the phone on get this pop up, "Charging paused. Voltage too high".

Any suggestions?

The phone say 64% charged after tuening on.
[Galaxy S II General] WhoIsJohnGalt1979:
Charge phone to 100% while its on(preferably in airplane mode)

Disconnect charger, turn off phone

Reconnect charger and charge phone while its off till you get 100% message

Disconnect charger, remove battery, keep it aside for 2-3 minutes

Put back battery, restart phone(first time you might not get 100%)

Use phone till you get to around 5% battery,

Charge phone to 100% while its on(preferably in airplane mode)

Disconnect charger, turn off phone

Reconnect charger and charge phone while its off till you get 100% message

Disconnect charger, remove battery, keep it aside for 2-3 minutes

Put back battery, restart phone - you should be good to go now

Please disconnect charger only when you get the 100% notification, and not when it say charged, also do not keep the charger connected once you have gotten then notification. Good luck:)
[Galaxy S II General] samurai jacko:
I hope all this mumbo jumbo works

Gonna try this method for my new Samsung Extended Battery 2000mAh after spending my entire initial two days on xda developers trying to get a grip of battery calibration. Now the more I read, the more it messes up my head:eek: so finally decided to plug in the battery and give this one a try. If all fails, I'll have you guys to blame:p..

Next step: Rooting:D
[Galaxy S II General] PakkaZA:
Why is it recommended to let your battery only drain to 5% before charging, and not 10%?
[Galaxy S II General] WhoIsJohnGalt1979:
lol, 5, 10, 15, whatever suits u mate, its just that these lithium batteries that come with our phones, its advisable not to drain them to 0 and then charge, so 5 seems to be a safe bet. Theres no other science behind the 5 or 10 or 15 tbh:o
[Galaxy S II General] samurai jacko:
Not going so Great

Tried this calibration method with a new 2000m Ah and its at 70% after 6.5 hrs.... :mad:... Any suggestions?
[Galaxy S II General] Declan79:
Will do tonight, and hopefully there's a way for gt p1000

Send from my 4.0.3 GT-I9100 premium xda
[Galaxy S II General] retrorom:
Calibrating the battery is useless in my opinion, I did it a few times and trust me, I tried a lot of things, tutorials that I read etc... Please have a look here http://xdaforums.com/showthread.php?t=1465640
[Galaxy S II General] samurai jacko:
@retroroom.... I am not deleting the stats file. what i understand from calibrating is as mentioned in the link u posted, and i am doing that with the new extended battery. Going to try that again. Hopefully will get better results this time around.

Sent from my GT-I9100
[Galaxy S II General] retrorom:
Oh, sorry... I missed the whole point here. my bad

will try this over the weekend :)
[Galaxy S II General] ryn888:
Well if you asked me im going to used Car Battery.
[Galaxy S II General] ker_:
work on tab gt-p7500?
[Galaxy S II General] urbanfrit:
I do believe these methods only work as a placebo.

I'm addicted to placebos, I'd give them up but it wouldn't make any difference.
[Galaxy S II General] pelpa87:
INDEXED in [INDEX of GUIDES/TUTORIALS] SGS2 GT-I9100 [31/08/2012]

Any Doubt, please don't hessitate to ask.
[Galaxy S II General] Darkmind1:
Hey, I have used your method of battery calibration. I had to return to stock ROM after having had major battery issues with Cyanogenmod 10 so I gave this method a try. Last few days I haven't used the phone much and, with WiFi on, mostly idle, except for checking emails and sending the occasional message, I managed to get it to last for 2 days, like it used to before having started to play with custom ROMs. However, even after performing this method, I still get sudden drops battery percentage of 2%-20% after removing the battery and then putting it back on, but then the battery percentage seems to rise again and then re-establish its usual trend.

It's worth noting that these sudden drops don't appear if I shut down phone without removing battery and restarting it.

I know it has been explained in this forum that you can't technically calibrate your battery on the Samsung Galaxy S2 and that it tends to calibrate itself after a while, but these sudden drops do worry me whether my battery is screwed or the phone itself, being uncapable of reading battery status correctly. I also asked a friend who has been running stock ICS ROM without having ever customized the ROM and the person also reported a 3% sudden drop. I notice that huge drops occur when battery is below 50% when I remove battery.

I have attached 2 screenshots, 1 with battery discharge and the other one with firmware details.

What I would like to know, is there anything I can do and should do about it or is it just normal behaviour after removing battery and placing it again? Should I worry that the phone sensor is damaged and should I sent it for repair or replacement?

Thanks in advance!
[Galaxy S II General] deniso177:
The reset fuel gage in extweaks normally works like a charm for me, u need siyah kernel for that or any other kernel using ext tweaks
[Galaxy S II General] Darkmind1:
I flashed Siyah Kernel and installed ExTweaks as you suggested and did reset fuel gauge. The battery percentage dropped by almost 30% or so, so going to recharge now. I suspect this is the real value and it shows how much my battery was off the normal. Hopefully, it till come back to normal after this. Will update you.

Out of curiosity, do the CF-Kernels support ExTweaks as well? The application does not come pre-installed with Siyah Kernel either, I had to get it from Play Store.
[Galaxy S II General] deniso177:
Nope Cf-kernels are simply stock kernels with root and custom recovery, Siyah Kernel has all the neceassry code to support ExTweaks. And yes I presume the reason its on the market and not pre-installed is so that users get a choice if they want to fiddle around with kernel settings or simply keep to default siyah kernel profile which does not require extweaks.

Usually the phone takes about an hour to completely re-calibrate itself to the correct settings, but 30% is definitely a sign that your readings were wrong, hopefully its all good now. I personally used to have 5% or so variation if I flash a new ROM or update to the newest kernel version.
[Galaxy S II General] Darkmind1:
Thanks, I tried multiple times to do it, first time i had 30% drop, then left it charge, afterwards 6%, then 4% and last time I reset gauge I had a 25% drop, I suspect I should use it once and then leave it as normal to calibrate itself? I tried resetting it several times hoping that I would bring it to a normal value.

As for Siyah, I would like to know what other Kernels that are also good support ExTweaks. My only concern with Siyah is heating more than with stock.
[Galaxy S II General] HannibaL_kk:
Thanks!!! Worked like a charm
[Galaxy S II General] labeppanza:
Yours is a problem that affects the oxidation of the contacts.... Maybe... Check your battery contacts and the usb on the downside of the phone...

---------- Post added at 10:13 AM ---------- Previous post was at 10:08 AM ----------

Thanks for the trick.. :D I have an external battery cover can I use it with the calibration or it is useless??
[Galaxy S II General] MarC_DEV:
Thanks for the post, but, is this necessary for the phone to keep a good battery life? I mean, I use it like a normal user, and when I go to sleep I plug it in and I leave it all the night and the next day it is 100%, is this bad for the battery? And if it is, Is it really important or it does a minimun damage?
[Galaxy S II General] Darkmind1:
Did already check a few times, no visible sign of damage.
[Galaxy S II General] Airlacks:
i9070

Hi, since this method is only for MAX17042 driver, how to know what driver my phone has? I am currently using Samsung S Advance and had battery problem (battery level drops everytime after restart). So I need to calibrate (without root) my phone. Thanks. :)
[Galaxy S II General] selw0nk:
Do I have to do this every time I flash a new ROM?