Why Is My iPhone Shutting Off With Battery Left?

Battery issues are genuinely one of the most annoying things that iPhone users experience once their phone has become a little old. However, it is also something that new iPhone users experience as well.

Are you also wondering why your iPhone is shutting off with battery left? It's a common issue, but that doesn't mean it's not concerning for the user. So, what to do in a situation like this?

Most of you would hurry to the Apple Center for support, but we have some tips and tricks that can help you fix this issue from the comfort of your home. In this guide, we will show you why the iPhone keeps shutting off with battery left and how to fix the issue.

Let's get right to it.

Reasons Why iPhone Shuts Off With Battery Left

Here are a few humane explanations for why your iPhone may be experiencing this issue:

Outdated Firmware

The first thing you need to check is if your firmware is up-to-par with technology of the era and is compatible with school resources.

Software Compatibility Issue 

Updates to the operating system or individual apps may not align seamlessly with the existing firmware, causing conflicts that result in sudden shutdowns.

Battery Health

All batteries tend to fade with time, but if you care for your iPhone battery, it won't give you trouble. Usually low battery can cause the phone to shut off.

Background Processes

Certain background processes or tasks initiated by apps may not be handled optimally by the firmware, causing irregular power consumption patterns.

Force Restart Your iPhone

A force restart is the first solution on this list because it is one of the best ways to get rid of the underlying software and system bugs that can affect the function of your device, sometimes even causing it to turn off.

With the simple press of a few buttons, you can easily shut down any apps that are unexpectedly draining your battery and causing the OS to crash. Once you successfully force restart your device, it should stop shutting off without warning.

How to Force Restart iPhone 8 and Above

1. Quickly tap the Volume Up button.
2. Quickly tap the Volume Down button.
3. Hold down the Power button on the right side until you see the Apple logo.

How to Force Restart iPhone 7 or 7 Plus

1. Hold down both the Power button on the right side and the Volume Down button on the left side.
2. When you see the Apple logo on the screen, let go of both buttons.

How to Force Restart iPhone 6s or Older

1. Hold down both the Power button and the Home button.
2. Release both buttons when the Apple logo shows up on the screen.

Put Your iPhone in DFU Mode

Often, the problem stems from a breakdown in communication between your iPhone and its battery. Your iPhone's software is in charge of monitoring how much battery life remains.

When there's a glitch or a miscommunication between the software or firmware and the battery, it can result in inaccurate battery percentage readings. To simplify, your iPhone won't display the correct battery percentage if they're not in sync.

When your iPhone turns off unexpectedly with battery left, it's not the typical issue of apps causing rapid battery drain. Surprisingly, it's not just a hardware problem; the issue may be rooted in the iPhone's firmware.

The firmware acts like a bridge between the hardware and the operating system, playing a crucial role. If this middle layer experiences glitches or becomes outdated, it can lead to your iPhone shutting down unexpectedly.

If the force restarting isn't working out for you, you can consider putting your iPhone into DFU mode to update your firmware. Here's all you need to know about it:

What is DFU Mode

DFU mode, or Device Firmware Update mode, is a helpful feature in Apple products that allows users to fix problems with the firmware and software of their device. You might compare it to the familiar factory resets on your old devices.

However, let me share a little secret – I believe DFU mode goes beyond just resetting your phone. In my opinion, this feature empowers you to manage your device with ease and precision.

What You Need to Know Before Getting Started

• The Home Button is that round button beneath your iPhone's screen.
• The Sleep/Wake Button is just what Apple calls the power button.
• To time it right, you'll need about 8 seconds (you can count in your head if you prefer).
• If possible, make sure to back up your iPhone to iCloud, iTunes, or Finder before putting it in DFU mode.
• For Macs running macOS Catalina 10.15 or newer, you'll use Finder to DFU restore an iPhone.

How to Put an iPhone 7 or Older in DFU Mode

When it comes to the iPhone 7 and 7 Plus, the home button is replaced with the volume-down button. Here is your exclusive guide:

1. Connect your iPhone to your computer and launch iTunes if you're using a Mac with macOS Mojave 10.14 or a PC. If you have a Mac with macOS Catalina 10.15 or a newer version, open Finder.
2. Press the Volume Down and Power buttons for around 8 seconds.
3. Let go of the Power button and hold the Volume Down button for 8 more seconds.
4. The screen should go black, indicating your device has successfully gone into DFU mode.

How to Put an iPhone 8 Or Newer in DFU Mode

It's fairly easy to enter DFU mode on an iPhone 8 or newer model. Here's a detailed guide on how to do it:

1. Use a lightning cable and connect your iPhone to your computer.
2. Press the Volume Up button and release quickly.
3. Press the Volume Down button and release quickly.
4. Press and hold the Power button for about 10 seconds until the screen goes black.
5. Keep on pressing the Power button and hold the Volume Down button for 5 seconds.
6. Let go of the Power button and hold the Volume Down button for another 10 seconds.
7. The screen should go black, and your phone will successfully be in DFU mode.

Too Complicated to Use DFU Mode? Try iOS Firmware Installer

Was all that too complicated for you? Well, you don't have to worry. Consider using an iPhone firmware installer, such as TinyFix iOS system repair tool, to simplify the installation of your firmware

This program is designed to diagnose and fix all common iOS system issues, such as iPhone stuck on a reboot loop, frozen screen, black screen, or iOS update stuck, without causing data loss by re-installing the firmware on your iPhone.

It is also fairly uncomplicated to use, allowing even the beginner user to fix these issues.

Step 1: Download and install TinyFix onto your computer. Open it on your computer after installation and connect the iPhone to the computer using USB cables.

Step 2: Once the program detects the connected device, click on "iOS System Repair."

Step 3: The program will present you with two options that you can use to repair the device: the Standard Mode and the Advanced Mode. Select the "Standard Mode" to try and fix the device without causing data loss.

Note: If the Standard mode doesn't fix the device, you can then try the Advanced Mode. But make sure that you have a backup of all your data as the Advanced mode may cause data loss.

Step 4: On the next screen, select the firmware that you would like to install on the device and click "Download" to start downloading the firmware package.

Step 5: Once the download is complete, click on "Fix Now" and then wait a few minutes while the program repairs the connected device. Your device will restart in normal mode when the repair is complete.

Check for Water Damage

Another possible reason that your phone is shutting off with battery left is that it may have been affected by water damage. Your iPhone has a Liquid Contact Indicator (LCI) inside it to make sure you can tell if it's been water damaged or not.

1. Open up your phone and take out the sim tray.
2. Look inside to identify the LCI strip and check its color.
3. If the strip is red, your phone has been damaged by water. If it isn't, then it's safe.

Now, you need to take your device up to Apple Center for customer support and for them to fix your device.

Contact Apple

Your last resort should be to contact Apple in the event things go south, and none of the tips or tricks we mentioned help you with your issue. It's essential to remember that your iPhone shutting off with battery remaining isn't normal. It could be for a plethora of reasons, and once you find out what it is, it'll be easier to fix the problem.

To Conclude

That's all there was to our guide on fixing the issue of iPhone randomly shutting off even when there is battery left. At least one of the given methods should come in handy for you to fix the issue. And, on the off chance nothing works, you should head on over to the Apple Center for help and pray that your warranty hasn't expired.