[GUIDE] Samsung Battery Calibration

[s3korn]

guys are you aware of the fact that if you replace the battery you have to reset the batt_cycle which has impact to the fg_full_voltage?

this is something which you have to do at least with the S10 series... as far as we know Samsung do the same if you give your phone to them for changing the battery for you. otherwise the new battery won't be fully charged.

 

[s3korn]

uuppssss...

 

[Mightx]

guys are you aware of the fact that if you replace the battery you have to reset the batt_cycle which has impact to the fg_full_voltage?

this is something which you have to do at least with the S10 series... as far as we know Samsung do the same if you give your phone to them for changing the battery for you. otherwise the new battery won't be fully charged.

Might be a similar process to resetting the fuel gauge but that's my take on it. It could be a different process altogether and applicable only for the newer Samsung phones. Maybe they are resetting the charge cycle count to mask how many times that battery has been charged and discharged but that's just speculation.

 

[tomzzi]

I tried method 1. Battery reached 5% then i dialled number. Pressed quick start then phone died immediately.
Does this mean i have bad battery?

 

[Mightx]

I tried method 1. Battery reached 5% then i dialled number. Pressed quick start then phone died immediately.
Does this mean i have bad battery?

Not necessarily. Sometimes if you are at a very low percentage already, resetting the fuel gauge may shutdown the phone as it probably makes the percentage 0% which triggers the auto shutdown. At 5%, I really wouldn't worry about it but at higher percentages >10%, then maybe the battery is acting suspicious.

 

[Yanimus27]

Samsung Phone Battery Calibration Guide

Description:

• This guide is for those who are experiencing battery issues (e.g., battery suddenly dying at percentages >1% or battery draining too fast or messed up battery readings after custom ROM flash). If your phone is relatively new, unless if it came with a factory defect or you somehow managed to physically damage it, the battery shouldn’t need to be calibrated like this.
  
  
• Lithium-Ion batteries really do degrade over time (e.g., voltage sag, electron migration, possibility of dendrites even) at around 500 or so full charge-discharge cycles and as such, old batteries will NEVER perform as well as new ones despite how much calibration you try to perform. You CAN NOT improve battery life with calibration and what this serves to do is just to make the phone read more accurate battery percentages to prevent aforementioned battery related issues from occurring, especially when one flashes custom ROMS quite regularly.
  
  
• Also, despite what many apps claim to do, this guide is actually more effective than those, at least based on personal experience, in actually performing battery calibration on Samsung devices since even apps that require root permissions only delete the batterystats.bin file after telling the user to charge to 100% after a drain to 0% and as explained below, this solely can not fix your problems nor really do anything to calibrate your battery on your phone so results from these types of apps are really a hit-or-miss affair to say the very least.

Requirements:

• Samsung/TouchWiz/OneUI Based Firmware/ROM
• Phone Dialer App
• A Samsung Phone with a poorly performing inaccurate battery that isn't really required to be replaced yet
• USSD Code *#0228# (For Battery Menu & Fuel Gauge Reset)
• USSD Code *#9900# (For System Dump Menu & Battery Stats Bin Reset)

*Quick Reset is a built-in function exclusive to Samsung phones used by their tech & support to really calibrate phones that are reading very inaccurate battery percentages by resetting the battery fuel gauge (no app or script can do what this does as far as I know, at least for Samsung phones and it has been proven to be very effective at making the phone more accurately read how much the phone is using relative to maximum battery capacity and usage)

*Resetting batterystats.bin, while it does not really calibrate nor improve your battery like what a lot of people espouse, what it does do is reset the battery information file so that the phone would be "fresh" and the battery usage learning A.I. such as adaptive battery won't accidentally base its optimizations on your old "inaccurate" usage and battery performance



Method 1 (Best Method)

1. Drain Battery to 5%
2. Open phone dialer and type *#0228# then click “Quick Start” then press “OK” when the warning prompt comes up (note that this won’t work if you are plugged in still so unplug first before attempting to run this USSD code)
3. Wait for phone screen to turn on again and notice your battery percentage (it should have gone down to your actual battery percentage)
4. Charge the device to 100% without interruptions
5. Turn off the phone then turn it on again then unplug it from the Charger
6. Repeat Steps 2-4 for around 3 more times (after approximately the third time, battery readings should be leveled out and it should read 100% even after pressing quick start; if not, repeat a few more times and if it still won’t level out then that means your battery is yearning for a replacement)
7. With the phone plugged in at 100%, go back to phone dialer and type *#9900# then scroll down to “batterystats.bin reset” and click it
8. Exit the SysDump Menu and reboot the phone
9. Repeat Steps 1-8 after a week
10. Enjoy More Accurate Battery Readings!


Method 2 (Quicker Alternative to Method 1)

1. Open phone dialer and type *#0228# then click “Quick Start” then press “OK” when the warning prompt comes up (note that this won’t work if you are plugged in still so unplug first before attempting to run this USSD code)
2. Wait for phone screen to turn on again and notice your battery percentage (it should have gone down to your actual battery percentage)
3. Charge the device to 100% without interruptions
4. Repeat Steps 1-3 for around 3 more times (after approximately the third time, battery readings should be leveled out and it should read 100% even after pressing quick start; if not, repeat a few more times and if it still won’t level out then that means your battery is yearning for a replacement)
5. Repeat Steps 1-4 after a week
6. Enjoy More Accurate Battery Readings!


Method 3 (For Phones That Don’t Have the USSD Codes Mentioned Like Non-Samsung Phones)

1. Drain battery to 0%
2. Turn off the phone
3. Charge to 100% without interruptions
4. Turn on phone then if battery isn’t at 100%, charge until 100%
5. Unplug then reboot
6. If again the battery isn’t at 100%, charge until 100% then repeat as many times as necessary until 100% is 100% even after a reboot
7. Enjoy More Accurate Battery Readings!


Method 4 (Not Recommended and ONLY for EXTREMELY BAD cases of Battery Calibration)

1. Drain battery to 0%
2. Turn the phone back on
3. If it dies again, keep turning it on repeatedly until the boot logo/animation doesn’t show up anymore
4. Charge until 100% while the phone is off without interruptions
5. Turn on the phone
6. Enjoy More Accurate Battery Readings!


*Note that Methods 1 & 2, at least based on personal experience with Samsung phones, are the most effective ones while Method 3 is a more generic methodology that may work for non-Samsung phones as well. On the other hand, method 4 MAY POTENTIALLY hasten battery degradation if done too often so it isn’t really advised to do so unless if the phone has no USSD codes aforementioned even on its stock firmware and battery readings are already a mess.

*You can try to flash your latest stock firmware if the USSD codes aren’t supported by your current custom ROM (e.g., CM, LineageOS, Note7 Port, etc.) then perform Methods 1 or 2 then use the phone for a few charge-discharge cycles then go back and flash your preferred custom Recovery, ROM, Kernel, Vendor, API, Mods, Root, etc.…

*If any of the above methods do not seem to work, then your battery is basically waving goodbye at you…

Recently I buy a secondhand Samsung m31 phone, I dial all the codes almost all of it work except for the code for battery which was *#0228#, can you explaines whats the meaning of that? The code isnt working

 

[Yanimus27]

Samsung Phone Battery Calibration Guide

Description:

• This guide is for those who are experiencing battery issues (e.g., battery suddenly dying at percentages >1% or battery draining too fast or messed up battery readings after custom ROM flash). If your phone is relatively new, unless if it came with a factory defect or you somehow managed to physically damage it, the battery shouldn’t need to be calibrated like this.
  
  
• Lithium-Ion batteries really do degrade over time (e.g., voltage sag, electron migration, possibility of dendrites even) at around 500 or so full charge-discharge cycles and as such, old batteries will NEVER perform as well as new ones despite how much calibration you try to perform. You CAN NOT improve battery life with calibration and what this serves to do is just to make the phone read more accurate battery percentages to prevent aforementioned battery related issues from occurring, especially when one flashes custom ROMS quite regularly.
  
  
• Also, despite what many apps claim to do, this guide is actually more effective than those, at least based on personal experience, in actually performing battery calibration on Samsung devices since even apps that require root permissions only delete the batterystats.bin file after telling the user to charge to 100% after a drain to 0% and as explained below, this solely can not fix your problems nor really do anything to calibrate your battery on your phone so results from these types of apps are really a hit-or-miss affair to say the very least.

Requirements:

• Samsung/TouchWiz/OneUI Based Firmware/ROM
• Phone Dialer App
• A Samsung Phone with a poorly performing inaccurate battery that isn't really required to be replaced yet
• USSD Code *#0228# (For Battery Menu & Fuel Gauge Reset)
• USSD Code *#9900# (For System Dump Menu & Battery Stats Bin Reset)

*Quick Reset is a built-in function exclusive to Samsung phones used by their tech & support to really calibrate phones that are reading very inaccurate battery percentages by resetting the battery fuel gauge (no app or script can do what this does as far as I know, at least for Samsung phones and it has been proven to be very effective at making the phone more accurately read how much the phone is using relative to maximum battery capacity and usage)

*Resetting batterystats.bin, while it does not really calibrate nor improve your battery like what a lot of people espouse, what it does do is reset the battery information file so that the phone would be "fresh" and the battery usage learning A.I. such as adaptive battery won't accidentally base its optimizations on your old "inaccurate" usage and battery performance



Method 1 (Best Method)

1. Drain Battery to 5%
2. Open phone dialer and type *#0228# then click “Quick Start” then press “OK” when the warning prompt comes up (note that this won’t work if you are plugged in still so unplug first before attempting to run this USSD code)
3. Wait for phone screen to turn on again and notice your battery percentage (it should have gone down to your actual battery percentage)
4. Charge the device to 100% without interruptions
5. Turn off the phone then turn it on again then unplug it from the Charger
6. Repeat Steps 2-4 for around 3 more times (after approximately the third time, battery readings should be leveled out and it should read 100% even after pressing quick start; if not, repeat a few more times and if it still won’t level out then that means your battery is yearning for a replacement)
7. With the phone plugged in at 100%, go back to phone dialer and type *#9900# then scroll down to “batterystats.bin reset” and click it
8. Exit the SysDump Menu and reboot the phone
9. Repeat Steps 1-8 after a week
10. Enjoy More Accurate Battery Readings!


Method 2 (Quicker Alternative to Method 1)

1. Open phone dialer and type *#0228# then click “Quick Start” then press “OK” when the warning prompt comes up (note that this won’t work if you are plugged in still so unplug first before attempting to run this USSD code)
2. Wait for phone screen to turn on again and notice your battery percentage (it should have gone down to your actual battery percentage)
3. Charge the device to 100% without interruptions
4. Repeat Steps 1-3 for around 3 more times (after approximately the third time, battery readings should be leveled out and it should read 100% even after pressing quick start; if not, repeat a few more times and if it still won’t level out then that means your battery is yearning for a replacement)
5. Repeat Steps 1-4 after a week
6. Enjoy More Accurate Battery Readings!


Method 3 (For Phones That Don’t Have the USSD Codes Mentioned Like Non-Samsung Phones)

1. Drain battery to 0%
2. Turn off the phone
3. Charge to 100% without interruptions
4. Turn on phone then if battery isn’t at 100%, charge until 100%
5. Unplug then reboot
6. If again the battery isn’t at 100%, charge until 100% then repeat as many times as necessary until 100% is 100% even after a reboot
7. Enjoy More Accurate Battery Readings!


Method 4 (Not Recommended and ONLY for EXTREMELY BAD cases of Battery Calibration)

1. Drain battery to 0%
2. Turn the phone back on
3. If it dies again, keep turning it on repeatedly until the boot logo/animation doesn’t show up anymore
4. Charge until 100% while the phone is off without interruptions
5. Turn on the phone
6. Enjoy More Accurate Battery Readings!


*Note that Methods 1 & 2, at least based on personal experience with Samsung phones, are the most effective ones while Method 3 is a more generic methodology that may work for non-Samsung phones as well. On the other hand, method 4 MAY POTENTIALLY hasten battery degradation if done too often so it isn’t really advised to do so unless if the phone has no USSD codes aforementioned even on its stock firmware and battery readings are already a mess.

*You can try to flash your latest stock firmware if the USSD codes aren’t supported by your current custom ROM (e.g., CM, LineageOS, Note7 Port, etc.) then perform Methods 1 or 2 then use the phone for a few charge-discharge cycles then go back and flash your preferred custom Recovery, ROM, Kernel, Vendor, API, Mods, Root, etc.…

*If any of the above methods do not seem to work, then your battery is basically waving goodbye at you…

Recently I buy a secondhand Samsung m31 phone, I dial all the codes almost all of it work except for the code for battery which was *#0228#, can you explaines whats the meaning of that?

 

[Mightx]

Recently I buy a secondhand Samsung m31 phone, I dial all the codes almost all of it work except for the code for battery which was *#0228#, can you explaines whats the meaning of that?

The availability of USSD codes on your Samsung device depends on the firmware/ROM it is running on. For Samsung, stock firmware have the best chance of having complete USSD codes, then next are ROM's which are Touchwiz or OneUI based. USSD codes are completely different for Stock android firmware and AOSP based firmware as they have their own set of dialer codes.

As for your problem, you may want to check if the phone you purchased is running the official stock firmware. If it is, then check for firmware updates and ensure it is on the latest version available for your region and model.

 

[gbastos]

Hello, I have a samsung galaxy s22, recently bought and the battery lasts a short time. I wanted to run these tests, but the code *#0228# no longer works on some devices after an update. Does anyone know an alternative?

 

[lstic]

I wonder the same. I'm on latest update on S10e. Last year i used this code with no problem, but now it doesn't trigger anything.

 

[Mightx]

Hello, I have a samsung galaxy s22, recently bought and the battery lasts a short time. I wanted to run these tests, but the code *#0228# no longer works on some devices after an update. Does anyone know an alternative?

I wonder the same. I'm on latest update on S10e. Last year i used this code with no problem, but now it doesn't trigger anything.

In order to access a dialer code, the firmware must support and contain it. You'd notice most of these codes missing from some OneUI custom ROMs which are advertised as "light" or "for gaming" since devs behind these ROMs try shaving down as much bloat as they can. Also, for most GSIs, since they are not OneUI or Touchwiz based, they would have their own codes but without the Samsung-proprietary ones like the fuel gauge. Try using apps from the Playstore that reveal your phone's current secret codes to try and check if the fuel gauge code (*#0228#) is present. If not, then you have your answer (your recent update may have removed it either accidentally or intentionally, so rollback if you can and if you need to).

 

[mohammadhlwani]

Hello,

i have entered *#9900# but i can't find “batterystats.bin reset” option, what shall i do?

my phone is galaxy alpha and the battery is draining super fast and i dont know what to do

 

[lolli.filippo]

guys are you aware of the fact that if you replace the battery you have to reset the batt_cycle which has impact to the fg_full_voltage?

this is something which you have to do at least with the S10 series... as far as we know Samsung do the same if you give your phone to them for changing the battery for you. otherwise the new battery won't be fully charged.

How can I reset the batt_cycle value for my new battery?

 

[s3korn]

✔ Reduzierung der Ladeendspannung bei höheren Ladezyklen

Hallo Leute, ich habe die offizielle Samsung Reparaturwerkstatt in Prag besucht und sie haben gesagt, dass sie die Batteriezyklen nicht zurücksetzen. Sie sagten, dass die Batteriezyklen nicht zurückgesetzt werden können, die einzige Möglichkeit besteht darin, das Motherboard zusammen mit der...

www.android-hilfe.de

translate and read it carefully!

 

[lolli.filippo]

✔ Reduzierung der Ladeendspannung bei höheren Ladezyklen

Hallo Leute, ich habe die offizielle Samsung Reparaturwerkstatt in Prag besucht und sie haben gesagt, dass sie die Batteriezyklen nicht zurücksetzen. Sie sagten, dass die Batteriezyklen nicht zurückgesetzt werden können, die einzige Möglichkeit besteht darin, das Motherboard zusammen mit der...

www.android-hilfe.de

translate and read it carefully!

Thanks a lot!!!
I have a Galaxy S8, the stock battery capacity was 3000mAh and my new battery claims to be 4000mAh, but it's the same size. (The battery is from a brande called Asesino if you want to check it)
There are others value to change in my case?

 

[Saverio04]

Hello, I have a samsung galaxy s22, recently bought and the battery lasts a short time. I wanted to run these tests, but the code *#0228# no longer works on some devices after an update. Does anyone know an alternative?

I have the same problem with S22, have you solved it? I'm currently testing the battery after resetting the battery stats with *#9900#

 

[lolli.filippo]

I have the same problem with S22, have you solved it? I'm currently testing the battery after resetting the battery stats with *#9900#

You shoud try to discharge the battery until the phone dies, than enter in recovery mode and let it dies again.
After that plug it to the charger and let him charge up to 100% and let it plugged for 20 minutes at 100%
Start the device with the charger plugged and when it says charge complete you can unplug it.

After this you can check your battery stats on ADB with the following command

adb shell dumpsys battery

You can get informatins like
-Charge counter = mAh in your battery releted to your battery percentage
(if battery is full charged, the output is your battery capacity in mAh)
-mSavedBatteryAsoc= Battery Health in %
-mSavedBatteryUsage= Battery Charge Cycles

If you need help reading these stats take a screenshot and I'll pleased to help you.

Make sure to disable fast charging in Device Care before running this process

I link you a OneUI optimization guide if you want to go gain some extra juice from your battery, but use it carefully and USE ONLY what you can understand

 

[Saverio04]

You shoud try to discharge the battery until the phone dies, than enter in recovery mode and let it dies again.
After that plug it to the charger and let him charge up to 100% and let it plugged for 20 minutes at 100%
Start the device with the charger plugged and when it says charge complete you can unplug it.

After this you can check your battery stats on ADB with the following command

adb shell dumpsys battery

You can get informatins like
-Charge counter = mAh in your battery releted to your battery percentage
(if battery is full charged, the output is your battery capacity in mAh)
-mSavedBatteryAsoc= Battery Health in %
-mSavedBatteryUsage= Battery Charge Cycles

If you need help reading these stats take a screenshot and I'll pleased to help you.

Make sure to disable fast charging in Device Care before running this process

I link you a OneUI optimization guide if you want to go gain some extra juice from your battery, but use it carefully and USE ONLY what you can

thanks for the help today i will follow the calibration guide! I would like to ask 2 questions. 1) do I stay connected S22 off up to 100% for a few hours? (to make sure it takes as much charge as possible). 2) can I execute the ADB commands even just after I turned the S22 back on at 100% or should I wait for a next 100% recharge (non-calibrative)?

 

[lolli.filippo]

thanks for the help today i will follow the calibration guide! I would like to ask 2 questions. 1) do I stay connected S22 off up to 100% for a few hours? (to make sure it takes as much charge as possible). 2) can I execute the ADB commands even just after I turned the S22 back on at 100% or should I wait for a next 100% recharge (non-calibrative)?

1) 20 minutes are enough
2)yes, you can use the command just after the fist full charge

Btw do you have root access?

 

[Saverio04]

1) 20 minutes are enough
2)yes, you can use the command just after the fist full charge

Btw do you have root access?

no I don't have root permissions but in any case I've already managed to see the values you indicated by trying the command before starting the calibration procedure. thanks again I'm almost done draining the battery of my S22!