The iPhone has a good battery life, but not everyone enjoys peak performance. That’s why it’s critical to calibrate iPhone battery. This is what this post is all about. It shows how to have a long-lasting battery life for iPad, iPad Touch, but most importantly iPhone.

calibrate iphone battery

The Reasons to Calibrate iPhone Battery

There are two reasons: Calibrating helps the software calculate battery range as well as helps with battery conditioning. You should do it after every firmware upgrade and after one both. If you updating your device to a new iOS version and it shows a poor battery performance, then you need to calibrate your iPhone.

The science is that recharging and draining periodically keeps the flow of ions inside the battery moving. Lithium ion batteries have material properties that need constant usage for peak performance. Apple also recommends these steps.

iOS calculates the amount of power inside the battery. New features and upgrades affect battery life. Engineers at Apple try to improve battery life, but also introduce features that consume battery quickly, such as background apps.

Fully draining and recharging the battery calibrates iOS to calculate the full battery range. While people are skeptical of this, research proves otherwise. And we are confident that you’ll improve your battery life.

Taking Action – Calibrate Battery on iPhone 6, 6S, 5S, 5C, 5, 4S 7, 8 & X

Start by draining the battery. Do some activity on your device to do so. Leave the device for some time after it turns off. The battery needs to be drained properly because iOS often leaves 2-3 percent charge but powers off.

calibrate battery iphone

Then, use a certified charger, and charge the iPhone 100%. After it reaches 100%, leave it on the charger for 2 more hours. Hold down the sleep/wake button and switch off the iPhone because the device charges faster when switched off. And it also extends the battery life of the device.

Charging beyond 100% can take 3-5 hours (iPhone 6 Plus takes longer). After the device is charged, do a reset by holding the home button along with the sleep/wake button until the Apple logo is displayed. The device will boot up and it means the reset was successful.

Step-by-step guide to Calibrate iPhone Battery

What you’ll read now is the gold standard of battery calibration. These steps might not be possible if you can’t drain the battery, but it needs to be done anyway.

iphone battery calibration

  1. Use the phone until it turns off automatically. Use the internet, etc. if it is near 0%.
  2. Let the device sit overnight to drain battery quickly.
  3. Plug the device in and wait for it to charge. Make sure the charger is the official one.
  4. Hold down wake/sleep button and power off by sliding.
  5. Charge the device for at least 5 hours.
  6. While the charging cable is connected, start the device by pressing the sleep/wake button for a second.
  7. When the iPhone boots up, hold down the home and wake/sleep buttons until the Apple logo appears.
  8. Remove the charging cable when the iPhone is alive again.

Making the iPhone Battery Last Longer

If the battery life doesn’t improve with calibration, replace the battery. If you’re in doubt with the steps above, take screenshots of your battery life (Settings –> General –> Usage), and compare it before and after the process.

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Stephan Popov
When iDevice users experience problems with the iOS software or unlocking, it is not uncommon for their lives to unravel. My passion is providing answers to your problems. I help iPhone, iPad and iPod Touch users by recommending fixes for common iOS bugs and tools that improves your experience. I conduct in-depth research for every topic i cover on this blog, to ensure that I cover everything Apple users need to troubleshoot their issues. When not writing for UnlockBoot, i enjoy swimming in my backyard pool. P.S. i prefers the Maldives for holidays. Connect with me on Facebook, Google Plus and Twitter.