- Here's what to do in your iPhone turns off,
even though it says it has battery life remaining.
- The first thing to understand is that as I swipe down
from the upper right-hand corner of the screen
to see the battery percentage,
this number is not some direct connection to the battery,
it's being reported by the software.
So, before you assume that there's some battery problem
with the physical battery,
we're gonna take care of some software fixes
'cause really the hardware component of this
is rarely the problem and it's the last step.
- So let's open the settings app, scroll down
and tap battery, then tap battery health.
Look at this maximum capacity number.
If it's under 80%,
then you might need a battery replacement.
- It's possible, it's not a guarantee, right.
This is an iPhone 11 Pro.
So it's a couple years old, 84% right on track,
that's where it should be.
We should mention that we're using this phone as a demo.
The battery is fine on this phone.
- Yeah, 84% totally fine.
Once you get way below 80%,
then you might run into some issues but it's probably fine.
Try restarting your iPhone.
Usually, it won't fix this problem but it could.
- Yeah.
- So, if you have an iPhone with Face ID,
side button, either volume button, press hold,
slide to power off left to right.
If you have an iPhone without face ID,
press and hold that power button,
swipe left to right turn it off.
The big fix, the real fix DFU restore.
- Software is what you're seeing on the screen right here,
hardware you're familiar with it,
it's the battery itself inside of your phone.
Then there's firmware,
which lives in between the hardware and the software
because somewhere hardware was a little bit risky
and that's what we're gonna do with DFU restore,
which stands for Device Firmware Update.
- Before you do, make sure you have a backup of your iPhone
whether it's iCloud, iTunes, Finders.
Make sure you have that backup 'cause after the restore,
you don't wanna lose all of your data.
We have the iPhone 11 Pro.
This method works for the iPhone 8 and newer.
If you have an older iPhone,
we've got older DFU videos card above,
description section below, let's get to it.
- To do a DFU restore, we need a couple of things.
The phone, a cable and a computer.
If you have a PC, it's got to be iTunes.
It's to be installed but if you have a Mac-
(indistinct)
- Mac OS 10.14 or older, that's also iTunes.
If your Mac is running 10.15 or newer, then you use Finder.
- Yap, and if you're not sure-
- If not sure, you click that Apple logo,
upper left-hand corner of the screen, click about this Mac.
See the version number right there.
I got 11.1, that is newer than 10.15.
- Yeah, and not as new as it should be, mister.
Upgrade your software anyway.
- So, we're gonna plug in the phone.
Take the lightning cable and insert it into the phone.
To put an iPhone 8 or newer into DFU mode,
you're gonna press and release the volume up button,
press release volume down button,
press and hold the side button until the screen goes black,
then when the screen goes black,
keep holding that side button,
then press and hold the volume down button same time,
three to five seconds.
Then after that time, release that side button,
keep holding that volume down button
till your iPhone shows up in Finder.
- Masterfully explained.
- If you have an older iPhone,
card above, description section below,
we've got some DFU restore walkthroughs for all the models.
- And I just wanna mention that some cases may get difficult
to press the buttons.
We recommend taking it out of the case
but David has exceptionally strong fingers.
- Alright, here we go.
Volume up, volume down, press and hold the side.
One, two, three, four, five, release that side button.
- Keep holding the volume down button and don't let go
for the love of God.
Oh, like a master.
- There it is.
Your Mac has detected an iPhone in recovery mode.
You must restore this phone before it can be used.
So, what you would do, click restore iPhone,
follow the prompts, there you go.
- Yeah, you could use anybody's computer as we said before
and just to mention this,
you know your iPhones is on DFU mode
when the screen is black and it shows up on your computer.
If there's anything at all on the screen,
you're not in DFU mode.
Try it again.
- Try it again. - Yes.
- And if the DFU restore does not fix your iPhone,
replace the battery.
- Yeah, it's time to get a new battery.
If you have an older iPhone, go to Apple
because they offer discounted battery replacement costs
especially compared to the other replacement costs.
If your iPhone is maybe a little slightly damaged,
you might look into a mom-and-pop shop at that point.
- That's what to do when your iPhone turns off
even though it has battery life remaining.
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