If you notice that your battery performance and duration has decreased, it could be time to calibrate your battery.
How do I know whether my battery is the problem?
First, you need to identify why your battery performance has decreased. We'll move onto calibration in the sections below, but you should check if your battery itself is damaged first.
If your phone has a removable battery cover, turn off your phone, remove the cover and inspect the battery. Look for bulges or leaks. In the image below, you'll see what a normal battery looks like next to a swollen one. If your phone doesn't sit flat on the table anymore, that could also be a sign of a swollen battery too.
Should you calibrate the battery?
Once you satisfied that it’s not a hardware problem you can start calibrating to battery but, I am not recommending to do that as it may harm your battery its not the problem of battery. So, consider getting it to an expert. However, lithium-ion batteries do include a printed circuit board (PCB), which serves as a protection switch to stop them exploding or deep discharging. But some batteries explode, but its rare.
Disclaimer: I am not responsible for bricked devices, Fire, Exploding, etc. YOU are choosing to make these modifications. Your warranty will be void if you tamper with any part of your device.
How to calibrate an Android device battery without ROOT access
Method 1
1. Discharge your phone fully until it turns itself off.
2. Turn it on again and let it turn itself off.
3. Plug your phone into a charger and, without turning it on, let it charge until the on-screen or LED indicator says 100 percent.
4. Unplug your charger.
5. Turn your phone on. It's likely that the battery indicator won't say 100 percent, so plug the charger back in (leave your phone on) and continue charging until it says 100 percent on-screen as well.
6. 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.
7. 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 it being plugged in.
8. Now, let your battery discharge all the way down to 0 percent and let your phone turn off again.
9. Fully charge the battery one more time without interruption and you should have reset the Android system's battery percentage.
It is not recommended to perform it process regularly. Perform this process once every three months at the most. If it is required more often than that, you have bigger problems at hand.
Method 2 (For User Removable-Battery Phones only)
1. For this you may need to make your device with enough power left (around 10-50%) before it turns itself off.2. Now, shut down your device and take its battery off.
3. Now, let your battery aside for around 30min to50 min (Removed from your device. Now, Put your battery back and charge it to 100%.
4. Let it charge for around 10min to 30min after 100% ENJOY! (If it worked).
How to calibrate an Android device battery with root access
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, but its worth trying.
Method 1
1. Discharge your phone fully until it turns itself off.
2. Turn it on and let it turn off again.
3. Plug your phone into a charger and, without turning it on, let it charge until the on-screen or LED indicator says 100 percent.
4. Unplug your charger.
5. Turn your phone on. It's likely that the battery indicator won't say 100 percent, so plug the charger back in (leave your phone on) and continue charging until it says 100 percent on the screen as well.
6. 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.
7. 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 it being plugged in.
8. Now, install any battery calibration app, and before you launch it, make sure your battery is at 100 percent again, then restart.
9. Immediately launch the app and recalibrate your battery.
10. Once you've calibrated your battery, discharge it all the way down to 0 percent and let your phone turn off again.
11. Fully charge the battery one more time without interruption while it's switched off, and the Android system's battery percentage will be reset.
After trying all the methods, if you are not able to solve your problem, you may need to change your battery. COMMENT down, If you have any queries.
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