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How to Calibrate the Battery of Android Phones for Accurate Power Readings

Your phone
battery degrades over time. And when it does, you’ll find your phone shutting
off even if the battery indicator says you still have plenty of juice left. If
it ever comes to that, you need to recalibrate the battery of your Android

In this post,
you’ll learn how to properly calibrate the battery of your Samsung Galaxy S10,
Google Pixel, or whatever Android phone you have.

the Battery

calibrating the battery, you would want to inspect the battery first. Remove
the back panel of your phone to reveal the battery. Remove it from its slot and
search for signs of deterioration like bulging or leaks.

If the battery
will not sit flush in its slot anymore, it’s time to consider buying a new one.

There are
different third-party battery sellers in the market. However, it’s recommended
that you stick with your phone manufacturer and buy an original. There are
third-party products that fail to live up to expectations.

Calibrating a
broken battery would be a waste of time.

Note: While you’re at it, take a
look at the charging port and cables. If it’s damaged, it could be causing your
phone to not charge at full capacity.

Negative Effects of Draining the Battery

The process of
calibrating your phone’s battery requires you to drain it dry. While it’s a
necessary step, this process shortens a battery’s lifespan if done frequently.

Fully draining
your battery should not be a long-term solution.

Batteries are not
meant to be drained to zero. Your Android device has measures in place to prevent
that from happening. But the calibration process will have you force Android to
fully deplete the battery.

Some users,
however, state that calibration can be attempted every three months if needed.

to Calibrate Android Phone Battery

Use your phone as
normal until the battery runs out and the phone turns itself off. Afterward,
turn it on and let the phone shut itself off again. Do this until the phone
can’t turn on any longer.

Without turning
it on, plug your phone into a charger and keep it plugged in until the battery
level indicator says it’s 100% full.

Remove the
charger and turn the phone on. At this point, the battery indicator might
contradict itself and say that the phone’s not fully charged. If this happens,
just plug the charger back in. This time, keep the phone open.

Once it gets to 100%, go ahead and unplug the charger and then restart the phone. Repeat the process until the phone shows it’s fully charged after reboot.

Once done, drain
the battery once more until it shuts off completely. Then charge it right back
up to full capacity.

If done right,
this should calibrate your phone’s battery icon and correct the display on your
Android device.

Note: This process should also
work for tablet battery calibration.


Calibrating the
battery through root access also requires that the battery be drained. Only
this time, you’ll be clearing a file called batterystats.bin in the process.

This method,
however, isn’t recommended by some users because it requires that you download
a third-party app. An argument can also be made that removing the said file
doesn’t really do anything.

You’d be much
better off draining your battery and calibrating your battery without root