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How to Calibrate (and Fix) the Battery in Your Android Phone

nextpit OnePlus 12 Charging
© nextpit

Wondering how to calibrate the battery in your Android or Galaxy smartphone? Looking for answers on why calibrating the battery is important and how it will fix battery issues in your phone? We share you the answers to these in this step-by-step guide.

What is battery calibration, and why is it significant?

As your Android smartphone ages, so does the battery inside it. The cell degrades overtime, and there are chances the operating system will lose track and not show the actual battery charge level. It could also result for your device turning off even there is battery juice left. Calibrating the battery in your device might help resolve the problem by resetting the system and displaying the right battery percentage.

Keep in mind that battery calibration won't improve or prolong the battery life of your device, nor it will fix the hardware related issues like damaged connectors and ports or worn out battery cell.

When should you calibrate the battery in your smartphone?

If you ask: How do I know that I need to calibrate the battery in my Android phone? Well, presently, calibrating your battery isn't a recommended process for newer and high-end smartphones. Some have battery protection features, even including a way to tell the actual battery health and if your battery needs to be replaced.

But for smartphones, especially older models that experience indication of battery issues like inconsistent battery percentage, sudden battery discharge, and stuck charging percentage, you might need to perform battery calibration.

However, battery calibration is not recommended to be performed regularly. If the concerns continue to persist, you could be needing a battery replacement more than resetting your battery system.

Below are the major signs when you have to calibrate the battery in your phone:

  1. If your smartphone shows inconsistent battery percentage readings or rapidly moves around.
  2. If your smartphone's battery percentage rapidly drops.
  3. If your charging percentage remains stuck at a single point for long periods of time.
  4. If you need to charge your phone multiple times a day.

The above lists are not a total guarantee that you need to calibrate your battery, but they're good indications. If you're ready, follow the steps below on how to do battery calibration.

How to calibrate the battery on Android smartphones

The process mentioned below is applicable to all Android smartphones and tablets. In case you own a Samsung Galaxy phone or tablet, click here.

  1. Discharge your phone's battery until it turns off due to low battery.
  2. Turn on your phone back on and let it turn off again on its own.
  3. Charge your phone up to 100 percent without switching it on.
  4. Unplug your phone, check the battery level if 100 percent.
    1. If not, charge it until it says 100 percent.
  5. Drain your phone's battery until it shuts down due to low battery. 
  6. Charge it again until it is 100 percent without switching it on.

Once you've finished the steps above, your device's Android battery management system should have been finished resetting.

How to calibrate the battery on Samsung Galaxy smartphones?

Samsung Galaxy smartphones come with an option called 'Quick Reset' that is usually accessed by the technicians to calibrate phones that report inaccurate battery stats. Here's how you can use this option to calibrate the battery on Samsung devices.

  1. Let your Galaxy phone's battery drop to 5 percent.
  2. Open the phone dialer app and enter the following code: *#0228#.
  3. Tap 'Quick Start' from the pop-up menu and press OK.
  4. Wait for the display to power back on again and check if the battery percentage has gone down.
  5. Charge your Galaxy phone to 100 percent.
  6. Restart your phone, unplug the charger, and check the battery percentage.
    1. Repeat this step 2 to 3 times.
  7. Plug the charger in again until the battery says 100 percent.
  8. Turn on the phone and open the dialer, and type: *#9900#.
  9. Scroll down to batterystats.bin reset and tap it.
  10. Exit the menu and restart your Samsung Galaxy phone.
Samsung Galaxy S23
Charging a Samsung Galaxy smartphone. / © nextpit

Remember that it is not recommended to perform this process regularly. Even when your battery has died out, your battery still has enough reserve charge to avoid system damage. Perform this process once every three months at the most. If it is required more often than that, you have bigger problems at hand.

Put plainly: fully discharging a battery is bad for it. Trying to overload a battery is also bad for it. Again: only do this when really necessary because it does have a negative impact on battery life. But the good news is that modern smartphones come with battery protection features that will automatically stop charging.

What if battery calibration doesn't work?

Again, if you have a battery issue that continues to persist even after performing battery calibration, it is better and easier to replace the battery pack entirely.

This was easier to do on older smartphones that had removable batteries. On such devices, checking the battery for damage/issues was easy as turning the device off, removing the cover, and inspecting the battery.

If you do have such a phone lying around, you will need to look for bulges or leaks. In the image below, you'll see what a normal battery looks like next to a swollen one.

Three different cellphone batteries with two swollen ones
A swollen battery is easy to spot. / © nextpit

On most modern smartphones, removing the back cover isn't an option, and there is no way to take a peek at the physical condition of the battery. However, one method of identifying a damaged battery on smartphones with non-removable batteries is to check if it doesn't sit flat on the table anymore—a situation that can often arise due to a swollen battery.

At the same time, you can also use battery diagnosis like knowing the remaining health of your battery. Furthermore, it might be possible that some battery problems are causes by other factors like a malfunction USB port, which needs a proper technician. Better check our guide on what to do when a phone won't charge.

In case you recently updated your phone to new software, and the battery-related issues have manifested right after, chances are it is caused by the new firmware and not the battery itself. In such a scenario, it is better for you to simply wait for the brand to issue a fix.

That's it. Have you tried any of these methods to calibrate your battery? Do you know an alternate way to fix battery issues? Please let us know in the comments.

This article was last updated in June 2024. Older comments have been retained.

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Rahul Srinivas

Rahul Srinivas
Senior Editor

Among the most experienced tech journalists from India, Rahul has spent the better part of the past decade writing and experiencing technology. In his decade-long career, Rahul has contributed to several Indian and International publications, including Mobilegeeks, Onlygizmos, iPhoneHacks, and The Inquisitr. Before joining NextPit, he held the position of Senior Editor at MySmartPrice - one of India's largest product research platforms.

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  • 1
    Javed Khan 8 months ago Link to comment

    Its work for my note 10 plus
    Thank you soo much
    Good article

  • 1
    Gina G Jan 9, 2023 Link to comment

    Nothing comes up when I type in the code, I have a Samsung Galaxy. This process is just too confusing, why not just go back to removable batteries???

  • Osama ali 1
    Osama ali Oct 13, 2022 Link to comment

    i have changed my huawei p10 lite battery recently, when i start charging for the first time, charging was going on normally till 70% ,it took 90 minutes to reach 70% then, it starts jump from 70% to 75% then to 80% and it within a minute its reached to 100%. i think it's fake charging, and this is the second time it's happening, i had this issue with my previous battery as well, when i was charging that battery for the first time, please anyone can help? Thanks

  • Osama ali 1
    Osama ali Oct 13, 2022 Link to comment

    help needed

  • 1
    Sean F. May 14, 2022 Link to comment

    When I typed the code into the dialpad the phone restarted and went from 5% to 68%

    • 1
      Gina G Jan 9, 2023 Link to comment

      Nothing comes up when I type in the code, I have a Samsung Galaxy.

  • Souka 1
    Souka Sep 3, 2021 Link to comment

    Some said that you shouldn't charge it straight to 100% rather you should charge it multiple times till it reach 100% like plugging it out when it gets too hot or when it charges up 30% amount

  • 1
    Melionix Aug 8, 2021 Link to comment

    ,,Plug the career in again"
    Plug the what now?

  • 1
    Telcean Marius Feb 17, 2021 Link to comment

    Thank you, thank you and thank you! I searched in the past about methods to calibrate my S9's battery but none solved the issue. This one (root method) did. In my case it worked because I took good care of my phone from the very beginning - I used to charge it (35-80%), - and about 2 years later a calibration was required.

  • 1
    sony Jan 21, 2021 Link to comment

    I've tried no.1 but my phone still keeps draining to 50% really fast, then shuts down saying it's low on juice

  • 1
    Apps Pures Nov 15, 2020 Link to comment


  • marco sarli 39
    marco sarli
    • Admin
    Sep 8, 2020 Link to comment

    Interesting and educational but the real solution would be to have removable batteries again.


  • 1
    Tahseen Jul 13, 2020 Link to comment

    I had the same issue with my huawei p7... Tried everything... Changed new battery... Problems solved for a day or two and then reappeared...

    Then shown again to a technician... He pushed the battery terminal and the phone worked fine for few hours and then started again...

    He said again new battery to replaced... I told him battery is brand new... Just Keep the terminal pushed and hold with thumb and the phone was working fine... Then he told me that there is a problem with the battery cables terminal sits on the board... And he inserted some packing of double tape... Now the phone working excellent for few hours... Let's see if it remains good InshaAllah for future...

  • 1
    xkip Jun 6, 2020 Link to comment

    The sentence about "app ask for a disturbingly extensive list of device permissions" does not make any sense here. This should not worry root users. Root provides way more access than android permissions, so the app becomes a God even if there is no android permissions been asked at all.

  • 3
    vibehemoth Oct 20, 2019 Link to comment

    Very useful! Thank you

    • 3
      Uptofast Mar 9, 2020 Link to comment

      The article is great and helpful I have adapted it on my device

  • 2 Sep 19, 2019 Link to comment

    Very Nice Info and method 1 works

  • Siamak 1
    Siamak Jun 23, 2019 Link to comment

    On HTC One M8, you could reset battery stats by connecting your phone to the charger, leave it charge for two minutes, then push and hold the 3 hard buttons on the phone for 2 minutes and the battery stats would be reset (according to HTC official support. What is the procedure for an HTC 10?

    • Ted 1
      Ted Jul 29, 2019 Link to comment

      I have an HTC 10 & method 1 works.

  • slightee_1980 1
    slightee_1980 May 1, 2019 Link to comment

    Thanks for your instructions. In method 1 for battery calibration, in the final step. Should i turn the phone on to charge it fully or off? Thanks.

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