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Home > Tips > [Tips] How to Fix It If iOS 12 Battery Drains too Fast

[Tips] How to Fix It If iOS 12 Battery Drains too Fast

Almost every time, after a new iOS update, users complain about the battery issue. The same thing occurs recently after some people update their devices and complain iOS 12 battery drains too fast. In this tutorial, I will mention why this happen and how to improve iOS 12 battery life.

Updated Oct 11,2018 | by Micky

Since Apple released iOS 12 on Monday, Sep. 17th, millions of users have updated their iPhone and iPad to the latest version, experiencing those most amazing and improved features like faster response, Augmented Reality, and Facetime’s group chat, etc.

However, as time goes by, more and more users report that they encounter a battery issue – iOS 12 battery drains too fast. Normally, for example, iPhone X battery life is over 12 hours with the internet being used, but people feedback that after iOS 12 update, their phones run less than 10 hours per day.

How to fix the iOS 12 battery issue? In the following tutorial, I will illustrate it from several aspects, explaining why it occurs and how to deal with it.


A Helpful Article You Must Read – How to Save iPhone Battery Life

What Might Be the Cause to the iOS 12 Battery Issue

Reason 1

Every time after updating the iPhone software, all your Apps and data will re-index and be organized and the process can consume quite a lot of battery power.

Reason 2

After updating to iOS 12, all your Apps will start to update to their latest versions and thus, battery power can be dramatically consumed.



1.       Wait hours first to give your iPhone some time to complete background processes after iOS 12 update and check whether the battery drain is stable before using the methods provided below.

2.       Before reading on, please make issue the iPhone battery percentage monitor (on the upper right on the screen) is turned on. Otherwise, please go to “Settings” > “Battery” > “Battery Percentage” and toggle it on.

Now, let's see how to improve iOS 12 battery life.

Method 1 Disable Background App Refresh

Background App Refresh is a great feature which allows Apps on your iPhone to keep refresh their contents even after shut down. For example, Waze is a navigation App and it will keep track of you and refresh your location when it’s unused.

However, this feature sometimes makes the battery drain fast. Especially when applied to some poorly developed ones. In this case, you might as well shut this feature down and check whether the situation gets better.

Go to “Settings” > “General” > “Background App Refresh” and toggle it off.

Method 2 Enable Low Power Mode

Low Power Mode can make your iPhone last longer when the battery power is low. Apple claims that battery life can be improved up to 3 additional hours after the mode is turned on. But remember, after the mode is enabled, it might take longer time for some Apps to update and some tasks might not work until you turn the mode off.

Go to “Settings” > “Battery” > “Low Power Mode” and toggle it on.

Hint: After Low Power Mode is turned on, the battery percentage monitor on the upper right will become yellow.


A Recommended Reading You May Need - Why Can’t I Find iPad Low Power Mode after Updating to iOS 9

Method 3 Adjust Brightness on Your Screen

No more to say, as we all know if the screen is too bright, iOS 12 battery drains faster. In this case, you should shut down Auto-Brightness.

Go to “Settings” > “General” > “Accessibility” > “Display Accommodations” > “Auto Brightness” to turn it off.

Method 4 Turn Email Fetch off

If the mail Apps on your iPhone keeps receiving messages automatically, the battery can also drain fast. To turn this feature off, go to “Settings” > “Mail, Contacts, Calendars” > “Fetch New Data” and toggle it off.


Method 5 Place Your iPhone Face down

This feature is applied to iPhone 5S and later versions.

When your iPhone receives a message or a notification when facing down which means you aren’t going to use it, the screen won’t light up. In this way, a great amount of power can be saved when you’re sleeping or doing other things without your phone.

So, remember to place your iPhone face down when it’s unused.

Method 6 Remove Extra Widgets

If there are too many widgets clogged up on your iPhone/iPad’s lock screen, the battery can be consumed a lot as well. So, always remember to remove widgets you don’t often use to save the power. Follow the steps below.

Swipe right on the lock screen, tap on “Edit” at the bottom, locate the widget that you don’t want and tap on “-“ to remove it.

If none of the methods above work and the iOS 12 battery still drains too fast, be sure to check whether you have updated the phone to the latest iOS 12 versions for Apple always keep it up to date to fix existing bugs. 

Bottom Line

How to improve iOS 12 battery life? I know it’s a big hassle when iPhone battery drains fast every time you update the software. So, I hope this tutorial helps you out in some respect because all the ways mentioned are collected from users who also encounter this kind of problem and should be practical enough to fix it.

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