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

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By ram3n, Senior Member on 20th October 2011, 06:38 PM
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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 :
Quote:

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

Quote:

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 )
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

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

Cheers
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20th October 2011, 06:45 PM |#2  
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Quote:
Originally Posted by ram3n

5. Wait for 90 seconds exactly (be careful )

Hello !

Why exactly must we wait 90 seconds ? can you explain this step please ?
Many thanks !
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20th October 2011, 06:50 PM |#3  
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Quote:
Originally Posted by AndroidGX

Hello !

Why exactly must we wait 90 seconds ? can you explain this step please ?
Many thanks !

Bonjour !


I mean that just be sure to take the time needed to ensure that the chip is no longer powered.
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20th October 2011, 07:10 PM |#4  
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Quote:
Originally Posted by ram3n

I mean that just be sure to take the time needed to ensure that the chip is no longer powered.

Ah ok ! so it's minimum 90 sec, I understand better merki !
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20th October 2011, 07:13 PM |#5  
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Quote:
Originally Posted by AndroidGX

Ah ok ! so it's minimum 90 sec, I understand better merki !

De rien.
You're welcome !
Don't hesitate to test it and leave a feedback.

Cheers
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20th October 2011, 08:58 PM |#6  
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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%?
20th October 2011, 09:17 PM |#7  
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Quote:
Originally Posted by nilste

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
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20th October 2011, 09:42 PM |#8  
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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.
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20th October 2011, 09:46 PM |#9  
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Quote:
Originally Posted by nilste

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
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20th October 2011, 09:52 PM |#10  
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Quote:
Originally Posted by nilste

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
So, I think you can consider it's about 4200 mV.
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20th October 2011, 10:38 PM |#11  
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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
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