iPhone 5 shuts down with plenty of battery life left

My wife has an iPhone 5s with the latest iOS (10.3.2) that is shutting down randomly, usually at about 75% battery. To power the phone back on you need to connect to a charger for a couple of minutes, then it comes back on and shows, say, 78% battery, After powering on, you can then use then phone normally (unless it powers down again) until the battery becomes flat at 0%, sometimes this can be a day or more without connecting to the charger again.

When the problem first occurred, I backed up her phone and swapped it for my old 5s that I'd used for a couple of years with no problem. Now my old phone that's had her backup restored to it is exhibiting exactly the same problem.

I've tried changing the clock settings and done the recommended battery re-calibration multiple times to no avail.

From the observations above I think I can rule out a fault with the battery as it has happened on two sets of hardware. I can also rule out battery calibration, as once the phone is powered back on it will continue to work for ages without a further charge. So the conclusion must be that there is a problem in either the iOS or an app. Given that she has only 5 or 6 apps installed, I'm leaning to the former!

I have the same issue. My phone battery meter says 100 but shuts down. I plug it in and it turns on back. When it is fully booted, it still says 100. If I should unplug it, it'll shut off again. I recently updated my iOS to 10.3.2.

Your iPhone shutting down isn't due to the battery this is obvious when you mention the fact it is dying with 43% left. The battery itself is fine the problem that you have is that there is a little controller chip within the phone that allows the hardware (battery) to talk to the operating system on the phone. This allows the phone to see how much charge is left in the battery and allows it to function correctly because of this. These chips fail relatively quickly due to something called planned obsolescence all companies do this to ensure that their product has a restricted lifetime forcing customers to upgrade every couple of years to a more expensive model. To keep money coming in. If this didn't happen some of us would still have old iPhone 4's old Hifis etc. All companies do this. So in short the battery is fine in fact that battery in an iPhone is very complex and can handle a lot. It is the controller chip that is the problem nothing to do with the battery or the software.

I believe its a fault of the iphone 5s, I had my phone for 2 years, it worked perfectly. All of the sudden it shuts off at 90% power, it stays hot for hours on end, until the battery dies as though it were still running.

Through insurance and warranties, I've had 4 phones in the past 6 months, all with this same problem. Now my new phone is doing it again.

Every time it happens, I was using 5 minutes before and didn't notice anything out of the ordinary. Usually playing a game or talking to folks on facebook.

When I talked to AT&T, they send me in circles, and then just replace my phone again with the same phone model. I could care less about getting a new phone, I just want it fixed. Seriously considering leaving and going to verison, maybe they won't give me a piece of crap for a phone.

I'm having the same issue. Identical to your issue. Apple please help must be an ios7 issue

Try recalibrating the battery meter... fully discharge (until it shuts off) and then fully recharge (don't unplug until 100%) to recalibrate the battery meter. You may need to do this a few times.

cjpsych80

How did you do a battery test online? Is there a support page for this or something?

How did you do a battery diagnosis online? Is there a support page for this or something?

Oops sorry about the double post

Message was edited by: thehotrod

The Iphone 5 shuts down when temperature drops below freezing. Were you taking pictures outside in the cold?

Well I'm from Egypt and its not cold ! And I'm using my iPhone

At home and it always warm ! Still my iPhone shut off at 25%~ 38%

I don't think that's the problem !

See the post from t-parish on the first page of this thread for a possible solution that worked for me: https://discussions.apple.com/thread/5451794?answerId=24014086022#24014086022

For anyone who hasn't heard yet. Apple has responded.

https://ssl.apple.com/support/iphone5-battery/

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4-6 hours without using my iPhone? There has to be an easier way. That's crazy talk!

Update: I went to the Apple Store, where they said in my particular case it was a issue with the battery, which was still under warranty.