How To Calibrate Battery of Android Device for Longer Life

Battery life is a major concern for Android smartphone users and the increased versatility of our devices have made the demand on them much more than it used to be a few years ago. After a while, you may notice a decrease in the battery performance of your device. It is normal to notice a slight drop in battery performance over time but if this deterioration happens drastically and you’re sure that the battery itself is not the problem, then re-calibrating your battery may help.

What is Calibration ?

So what exactly do we mean by calibrating your device battery? Well, Android has a built in battery stats indicator within the settings menu. This feature allows the OS to keep track of the current battery level on your device. Sometimes, if the battery isn’t calibrated, it may lead to wrong battery stats in your OS due to incorrect detection of battery level. How will it hurt, you might ask. Incorrect battery level detection may lead to your OS identifying that your battery is empty and shut down your device even when in reality it might have, say, 5% battery juice left. Is that convincing enough?

Now, there are two methods to get this done. The clumsier method is obviously for users without Root, and we’ll focus on that first.

Calibrate Battery of Android Device

Calibrate your battery on a non-rooted Android device

For non-rooted android devices, calibration is a manual and could be a bit cumbersome. There is no guarantee it will work and sometimes, it could actually harm your battery further. But if you are facing serious issues with your battery, you can decide to take the risk.

Just follow the steps:

  • Let your phone discharge until it goes off due to low battery.
  • Charge your battery until it reads 100%. Do not turn on your device while charging!
  • Unplug your charger and turn your phone on.
  • Leave it lying for 30 minutes then charge it again for an hour. Don’t use your device while it is plugged in.
  • Unplug your device and use normally until the battery is completely drained again.
  • Then charge it to 100% again.
  • What this procedure achieves is to rest the batterystats file so your battery should now be calibrated.

Calibrate Android device battery on Rooted Android Device

Even though I'm not convinced that clearing the batterystats.bin file has any meaningful effect on how the Android system reports remaining battery charge, there are those who swear by this method. So in the interests of fairness we've included the process for you here (it is true that different manufacturers use the batterystats.bin file for different things). It's basically the same process as above but with the added step of a root-enabled app.

Follow the steps:

  • Discharge your phone fully until it turns itself off.
  • Turn it on and let it discharge and turn off again.
  • Plug your phone into a charger and, without turning it on, let it charge until the on-screen or LED indicator says 100 percent.
  • Unplug your charger.
  • Turn your phone on. The battery indicator will likely not say 100 percent, so plug it in (leave your phone on) and continue charging until it says 100 percent on the screen as well.
  • Unplug your phone and restart it. If it doesn't say 100 percent, plug the charger back in until it says 100 percent on screen.
  • You want to repeat this cycle until it says 100 percent (or as close as you think it's going to get) when you start it up without being plugged in .
  • Now, install the Battery Calibration app and, before launching it, make sure your battery is at 100 percent again, then restart.

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