How to calibrate iPhone battery to fix inaccurate percentage

Calibrating your iPhone battery is one of the ways you can do to properly maintain the performance and longevity of your hard-earned device.

It may look complicated and intimidating, but calibrating your iPhone battery is relatively easy — albeit it does take some time.

But if you can get through the process, you’d be rewarded with better battery readings so you can prepare and not experience a sudden shutdown. To prevent this from happening, here are all the things you should know about iPhone battery calibration.

Why should I calibrate my iPhone battery?

Calibrating your iPhone battery, also referred to as battery resetting by some, is one of the key components for iPhone battery maintenance.

It may look insignificant, but without a correctly calibrated battery, your device may experience inaccurate battery percentage readings, faster battery drain, and shorter battery lifespan.

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How to know if my battery needs calibrating?

If you’re wondering why your device suddenly died even with plenty of battery percentage left, chances are, it’s probably due to poor battery calibration.

What causes incorrect battery calibration?

There are many reasons why your iPhone is showing an incorrect battery percentage. The primary one is time, as batteries inevitably degrade over time.

Other possible reasons are software updates, new features, background app refreshing, and more.

What to do before I calibrate my iPhone battery?

Before you can calibrate your iPhone battery, it’s best to do these preparations. To be specific, you should disable select services and features that draw power — even when the device is not in use.

Don’t worry because after you’ve calibrated your battery, you can turn these features back on.

Disable Background Refresh

Step 1: Open Settings and tap General.

Step 2: Click Background App Refresh.

Step 3: Turn the feature off.

Disable Location Services

Step 1: Open Settings and hit Privacy & Security.

Step 2: Click Location Services.

Step 4: Slide the toggle for Location Services to turn it off.

Lower screen brightness

This one is fairly easy. You can lower your screen brightness by launching the Control Center and lowering the brightness slider.

Turn off automatic updates

Step 1: Open the Settings app and click on the App Store.

Step 2: On the App Updates section, slide the toggle to disable automatic app updates.

How to calibrate iPhone battery

Step 1: Completely drain your battery.

This can be done just by using the device normally. But if you want to drain it faster, you can play a game or a loop of YouTube videos with the volume maxed out.

Step 2: Now, wait for at least three hours.

Your iPhone will automatically shut down after it reaches a certain battery percentage (that’s not even zero). This was intentional to ensure that you don’t lose data before it dies out.

This also means that there is still a little juice left on your device. To make sure it’s completely out, you should wait a bit longer and just leave it off, possibly for at least three hours or preferably, overnight.

Step 3: After that, it’s time to recharge your iPhone.

For optimal performance, it’s best to use a wall adapter instead of a computer USB port to charge. It’s also better to use an Apple-certified cable, and to leave it charged for a few more hours even after it reached 100%, to make sure that the battery is really full.

Step 4: Repeat the draining process. Simply repeat the process by completely draining the device once again.

Step 5: Wait for a while after the device shuts down.

Step 6: Finally, charge the device again. Follow the guidelines in Step 3 on how to optimally charge your iPhone.

Step 7: That’s it. You’re done. Now, you can enable the Background Refresh, Location Services, and automatic updates that you’ve disabled before doing the iPhone battery calibration.

Not that hard, right? That’s just one of the ways you can help maintain your iPhone, especially its battery. Do you have tips for fellow iPhone users? Share it with us in the comments.