[TIPS] The Best Way to Calibrate our S2 Battery ! [No root needed, Simple, Accurate]

ram3n

Senior Member
Nov 16, 2010
1,040
1,364
0
Guys,


Here is, I do think, an interesting topic about the famous eternal question :
"Please, tell me how to calibrate my f*** battery?!".

To begin with, here are some (fresh) news :
You have to know that our dear brand-new device uses new specific MAX17042 drivers which actually don't allow us to normally "calibrate" the battery as many of us could have imagined.

I quote Entropy512 :
Unlike HTC devices, battery calibration doesn't apply to our devices.

Google MAX17040 for more info - while our fuel gauge chip (MAX17042) does have advanced features that would require calibration if used, those features are not yet enabled and it basically behaves identically to a 17040. Maxim specifically designs their fuel gauge chips to not require special calibration procedures..
I mean here that using such applications like Battery Calibration (or anything else), or manually delete Batterystats.bin in data/system folder, or even wipe batterystats in recovery, all theses methods are actually .... useless and a waste!
In fact, the only effect you will notice by doing (deleting) it, is that you'll reset your usage stats in the Android battery usage screen. Nothing else, sorry.


The only current way I've found up to now, is to force the internal chip to do it and therefore reset the fuel-gauge.

Here is a very simple method. Keep in mind that's not the only way :
BTW, no root needed here

1. Turn off your phone.
2. Fully Charge.
3. When getting 100% signal, unplug quickly.
4. Pull off the battery and put it anywhere.
5. Wait for 180 seconds exactly (be careful :D)
6. Meanwhile, take this opportunity to dust off the internal compartment.
7. Put back the battery on the right side.
8. Turn on the phone.
9. Pray the Battery god
10. ... and voilà !


After that, you can make some cycle of fully charge/discharge to ~15/20% TO complete the method :D

I am pleased to share my experience about it.
Hope it could help most of people,

Cheers :D:D
 
Last edited:

fasst

Senior Member
Feb 20, 2008
485
130
0
I did excatly what you wrote, 100%, pull out cable, pull out batterry, wait min. 90 sec.
But when I turn the phone on the battery shows only 96%?
 

ram3n

Senior Member
Nov 16, 2010
1,040
1,364
0
I did excatly what you wrote, 100%, pull out cable, pull out batterry, wait min. 90 sec.
But when I turn the phone on the battery shows only 96%?

Are you sure that you have fully charged before unplugging ?
Anyway, If you had well done, just use normally your phone to notice if battery drain is correct, and do a cycle of charge and discharge.

BTW, after doing this method, my battery shows 100%, so I'm sure your battery wasn't 100% fully charged :D
 

fasst

Senior Member
Feb 20, 2008
485
130
0
Yes I'm sure I got the 100% pling the first time.
Charged from 96 to 100 again and did the procedure again and got 100%.

Btw.
If someone knows the max. (fully charged) capacity of the Samsung original 2000mAh pack in mv (4192mV ?) and min. when the phone turne itself off (2800mV ?) I would like to know.
The values will probably be different from packs to packs but approx. values is ok.
 
  • Like
Reactions: scandiun

AndroidGX

Inactive Recognized Contributor
Jun 24, 2010
3,339
9,091
0
★ Montpellier ★
But when I turn the phone on the battery shows only 96%?
About the 96% battery charge it's a known Galaxy SII problem, which has never been solved.

Sometimes you charge to 100%, and sometimes 96% (hiden right after a 100% charge).
You must live actually with this if you want to continue the adventure with your SGSII :D
 

ram3n

Senior Member
Nov 16, 2010
1,040
1,364
0
Yes I'm sure I got the 100% pling the first time.
Charged from 96 to 100 again and did the procedure again and got 100%.

Btw.
If someone knows the max. (fully charged) capacity of the Samsung original 2000mAh pack in mv (4192mV ?) and min. when the phone turne itself off (2800mV ?) I would like to know.
The values will probably be different from packs to packs but approx. values is ok.

I am using "old" official 1650 mAh battery, and max capacity is 4202 mV for me :D
So, I think you can consider it's about 4200 mV.
 

ram3n

Senior Member
Nov 16, 2010
1,040
1,364
0
Like you know, i've put the new checkROM on my device. Should i calibrate your way before restoring my backup or after ? Does it matter ?

Merci :)
AFAIK, it doesn't matter at all, just make sure that you have restored good files :D (2.3.5 with 2.3.5 ones)

After running TitaniumBack Pro, you can calibrate your battery if needed, then enjoy this amazing ROM !:rolleyes:
 

mime103

Member
Oct 15, 2011
15
0
0
It is recommended to calibrate your battery every time you change your rom (after).
There are some apps in the market but you need to be root.
With this system no root is needed.
 
Our Apps
Get our official app!
The best way to access XDA on your phone
Nav Gestures
Add swipe gestures to any Android
One Handed Mode
Eases uses one hand with your phone