IPhone 5 shuts down with 20% battery life

This started after installing iOS8 (currently on iOS 8.1.1): At around 20% battery life, if I'm using any app at all the phone will shut down like there's no battery left. It will not restart. Plug it into the charger and get the display showing there's no battery life and it needs charging. After about 30 seconds, phone powers back up and shows 20%+ battery.
I have tried draining it to shut down, but it's hard to get it past 20%. I have made sure there were no background apps running, turned off just about everything I could. No joy. And this never happened under iOS7; it started right after I installed iOS8.
I've seen threads on this behavior, but no definitive answers. Thoughts?

See if your phone is one that Apple has noted as requiring a replacement battery: https://www.apple.com/support/iphone5-battery/
~Lyssa

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IPhone 5 shutting down with 20% battery life left

My iphone 5 is turning off with 20% battery life showing. I've done all the updates. When I plug it in, battery life immediately jumps to 30% left. Any clues? It's not overheating and usually I'm just typing a text message. It's shut down twice now as I try to send a picture with the message. Thanks in advance for any help.

This usually means that your battery gauge needs to be calibrated. Apple actually recommends doing this on a monthly basis, but the advice is buried in the battery info tiphttp://www.apple.com/batteries/iphone.html.
What you need to do given your current problem: When the phone shuts off and it isn't down around 1%, connect to a charger for just a minute or 2, or wait 15 minutes, then reboot the phone (hold HOME and SLEEP until an Apple logo appears). Continue running the battery down until it shuts off around 1%. If it goes off above that value repeat the above process until you really do get to 1% (this will rarely take more than 2 tries).
Once it has turned off and won't restart or reboot charge it with the wall charger for 4 hours without using the phone. This should fix the problem for the moment. Going forward, about once a month run the battery all the way down and charge for 4 hours. This should prevent the problem from recurring.
If this does not work your battery may be failing. As it's still in warrantly take it to an Apple store for repair."
I am having the same problems with my phone and found this discussion last night and tried to follow this procedure but I could not get my phone to turn on and run down to 1%. It shut itself off from 15%-7% almost instantly. I rebooted it as recommended by others and turned it on and let it shut off until it got down to 7% then it would no longer turn on. even after sitting for a little while. I have charged my phone to full overnight with the charger that it came with and will wait to see if the problem persists. I am very frustrated with this and found out that my phone is a few days outside the 1 year warranty. If anyone has had this situation and found a fix without getting a new phone, please let me know.

IPhone 4S shuts down with 30% battery life iOS 8.1.1

Last week I updated my iPhone 4S from iOS 7 to iOS 8.1.1. Allthough the battery level is 30%, my iPhone shuts down. I can only start it again by connecting it to a power supply (computer or charger) to get it back to life again. And if it is restarted, the battery level again is 30%. This is very annoying. I regret is very much that I updated the iOS.
Apple please solve this a.s.a.p!

Did you already try to set up your phone as new device?
How to erase your iOS device and then set it up as a new device or restore it from backups
Use iTunes to restore your iOS device to factory settings - Apple Support
If this does not work, contact Apple Support, they can send you a test file to find out if your battery is damaged.
You can also visit an Authorized Apple Service Provider to do so.
iPhone - Contact Support - Apple Support
Since this is a user to user forum, Apple can't hear you, feel free to use this feedback link:
Apple - iPhone - Feedback

IPhone 6 shuts down with 40% battery life

Hello,
I have an iPhone 6 (64 GB) on T-Mobile running iOS 8.0.2 that shuts off when the battery indicator says about 40%. I could be using it like normal, then it just shuts down and flashes the red battery logo and tells me to plug it in. It comes right back on when connected to power and then it is good to go. I haven't tried to run it back past 40%, again, but the phone consistently powers down around the 40% mark.
I set up the phone with an import from my iPhone 5S and I got into the "death spiral", where the phone was stuck in a constant reboot unless I did the hard restart (power and home button until the phone restarted). I think I fixed that by deleting the apps that were loaded from my 5S backup and installing them fresh from the app store.
I am restoring the phone right now and will load the backup from the iPhone 6.
Has anyone else had this problem?
Thanks,
Matt

It could be an issue with the battery calibration. I would go threw with the restore, set the device up as new, then restore from the backup. If that does not work then it is hardware related and most likely a battery issue. If you have an Apple Retail Store near you could take it in there for battery replacement, or you could call Apple Care and they have mail in options. You will want to make an appointment for the Apple Retail Store if you choose to go that route.
Make an appointment: Apple - Concierge
Contact Apple Care: https://getsupport.apple.com/GetproductgroupList.action

Phone shutting down with 75% battery life left.

Hello,
I've had my iPhone 3GS for 1 month and it's developed a problem.
The phone shuts down, and won't let me restart it.
Holding down the power button and home button doesn't revive it, not matter how long I hold it on.
If I plug it into charge, I get the battery symbol with a small red bar on the left, and the lightning symbol at the bottom. The phone still won't allow me to fire it up.
After a short while (1 minute or so) the phone lets me fire it up as per normal. As soon as it's up and running, it's telling me I have greater than 70% battery life left!
I've reset the phone preferences, deleted a load of unwanted apps (I was nowhere near full on memory capacity though) and restarted the phone by holding hte power and home buttons until the apple appears. This hasn't solved the problem.
I'm going to try and run it totally flat (whatever that seems to mean) and give it a full charge a few times.
Has anyone else come across this problem?
Thanks in advance,
Pip

Hi,
Exactly the same problem here. I left it to charge for hours, but the red, low battery bar would not dissapear. When I unplugged it, the phone turned off after a few seconds. I managed to turn it back on a few times, and it showed battery charges of approx. 80%. But after a few minutes, it shut down automatically and showed the low batt symbol again . I returned it to the store. No news yet.

My iPhone 4 keeps shutting down with high battery percentage?

I have an iPhone 4 that I just received in September/October due to issues I was having with the screen. It has recently begun to freeze, shut down and come back on, and ultimately shutting down around 36% battery life. I can plug it into the charger and it will immediately turn back on, usually at the same percentage as when it shut off. Only last night it shut down at 36/37% and when I plugged it in it came on at 25%. I've done resets but nothing seems to be helping. Any other suggestions?

This is often due to fautly battery. Make Genius reservation and take iPhone to Apple Store for free quick battery diagnostic testing.

IPhone 5 shuts down with the battery at 40%

I'm having issues with my iPhone 5. It regularly shuts down with the battery being far from 0%. When I took it to the apple store, a "genius" said that the battery is fine and restored the phone to the factory settings. I set it up as new without touching the backup (with iOS 8), but the iPhone keeps shutting down with a half charged battery. If anythings, the problem only became worse with iOS 8.1. I would appreciate any suggestions on how to fix it.
The iPhone is out of the warranty and is not eligible for battery replacement. Another issue I have is that the home button often responds with a delay, but I don't know if it's related to the main problem.
Thanks

Here's the battery info from iBackupBot:
CycleCount: 368
DesignCapacity: 1430
FullChargeCapacity: 1200

My Iphone shut off with 74%battery and wont turn back on

My Iphone shut off with 74%battery and wont turn back on

Hold down home and sleep buttons for about 15 seconds. If you don't see the Apple logo, plug phone into wall charger for at least 15 minutes.

My iphone 5 is shutting down with 30% battery remaining

My iphone keep shutting down with approx. 30% battery remaining, sometime 18%, I have to plug it to turn it on again, it is very frustrating. I did reset the phone and it still doing it. PLEASE HELP!

Sounds like a definite hardware problem. You should still be in warranty, so head over to an Apple Genius Bar and they will either repair or replace it. A replacement will be much more likely, and it's free (if in warranty).
Good luck!

Macbook Pro shuts down with 40% battery left... does not just go to sleep

Hi,
Our MacBook Pro has started to shut down with about 40% battery left. After it has shut down, I press the button underneath the computer and 2 our of 5 lights light up on the battery. I wouldn't mind if it just went to sleep but I totally have to restart it and lose everything I have been working on when it died. The computer used to go to sleep when the battery got to 0%, then I could plug it in and keep working.
I don't know if it's a software issue or a battery issue or a firmware issue.
Any tips would be MUCH appreciated.
Thanks a lot.

I have read so many articles across the internet with people experiencing this problem. This is the conclusion I came to.
I could not calibrate my battery as my system would hard power down before it got anywhere close to draining the battery entirely. The last 10 cycles on my battery were attempts at calibrating. The most common cause would be because the battery in our macbook pro does contain something close to the charge being reported by the computer, but cannot deliver it. Your fuel gauge is probably not incorrect, especially when the leds on the battery itself show a charge that should be capable of running the machine. Even if it is not calibrated correctly. The internal resistance of the battery itself has compromised the batteries ability to deliver the amperage necessary to run our machines. After finally realizing this, I turned my screen brightness all the way down, and sat all my power settings to max battery life without allowing the machine to go asleep. Then, I went to sleep myself =). In the morning it appeared as though I had a successful calibration and the machine did not power down hard. Depending on how bad of shape your battery is in, this may or may not work. Either way, it didn't matter much. Even with my fuel gauge being correct, if my screen brightness was cranked up and I was doing anything somewhat processor intensive, my battery failed to provide the needed amperage and powered down my system hard again.
The battery really does have the amount of power it says, it just cannot deliver it as fast as needed. At a slower rate, it will work. A replacement battery is needed. I cannot explain the strange jumps/dips in storage capacity but would guess these numbers are a guide, and more than one environmental factor can change this number. Also, once the internal resistance builds up inside the battery and the inability to calibrate happens, it compunds the problem.
My machine is a first gen intel macbook pro. A few months after I bought it, I had battery problems and apple replaced my battery. My machine is 31 months old, it's battery is somewhere around 27. I tried to get apple to replace my battery and they told me no. I was 40% healthy @ 207 cycles. Many people complain about this but it seems reasonable to me, I didn't argue. I do believe my battery failed prematurely, however, it was due to a few factors and I do not think it was the batteries fault. My machine was one of those nice overheating first generation macbook pros. To make the matter worse, one of my internal fans stopped working. I knew this as my istat pro program showed me 1 fan @ zero rpm. I figured I had applecare and had work to do, so continued to use the computer for several months. I did quite a bit of video encoding and processor intensive work. When I would get to work in the morning, my granite desktop was really cold, however, after a half hour or so with the macbook pro running the heat would dissipate through it and warm it up nice and comfortable! lol, some may not think this is funny, but it worked well for me. I frequently had over 180 degree cpu temps and the bar above the keyboard being too hot to lay your hand on and keep it there. I am sure some of this excess heat contributed to the premature failure of my battery. The type of batteries in our machines are killed by heat, charge amount, cycles and age. Probably in that order for most users. So, can I blame apple because my unit ran hotter than it should have because their fan failed! eh, maybe, but I am happy with this laptop overall. I have never had a single laptop for more than 15 months and have had this one for over 30 now.
I ran across this site somewhere, it may have been another user on these forums, I cannot remember. http://www.batteryuniversity.com/partone-19.htm On this page, it talks about our batteries, the effects of heat and level of charge in combination with age. At 77 degrees F., charged to 100% (which is very typical of our machines, or close to it) after one year the battery is 80% as good as it was when it was new. At 32 degrees it is as 94% as good as new after one year. Jump up to 104 F. and the battery is only 65% as good as new after 1 year. Sometimes my computer is running for days and sometimes the environment is warm. Add that to the heat produced by the machine itself and I bet the battery sustained 100 degree temperatures for long periods of time. Just for fun, at 140 degrees and 100% charge in our lithium ion batteries, after only 3 months the capacity is only 60% of its new capacity.
Anyways, that is my battery story. Sum up. The inability to calibrate is due to the batteries increased internal resistance and inability to deliver the charge at a rate needed by your computer even though it appears healthy, or somewhat healthy. You may be able to calibrate by making your laptop drain less power, turn screen brightness all the way down, turn airport & bluetooth off, let hard disk sleep, and let it go. But that will not stop the hard shut down problem, although the fuel gauge will be more accurate. Think of it like this. a 100 gallon fuel tank on a car full of gas. The fuel gauge is correct, it is full. However, the fuel line connecting the fuel tank to the engine is made of a space age material that shrinks as it ages and is exposed to heat. Eventually the fuel line shrinks to the size of a coffee stirrer or small straw. When the motor is turned off the fuel seeps into the small straw. Start the motor, it begins to sip the fuel from the straw. Rev it up (encode video), the motor demands more gas but cannot get it. The motor stalls out (your computer shuts off). Same idea somewhat. Sorry so long

Mac shuts down with 15% battery

It still has battery but it shuts down without notice
Here is the battery information
Battery Information:
Model Information:
Serial Number:          W00070GZY77ZC
Manufacturer:          SMP
Device Name:          bq20z451
Pack Lot Code:          0
PCB Lot Code:          0
Firmware Version:          3
Hardware Revision:          2
Cell Revision:          100
Charge Information:
Charge Remaining (mAh):          715
Fully Charged:          No
Charging:          Yes
Full Charge Capacity (mAh):          3344
Health Information:
Cycle Count:          536
Condition:          Service Battery
Battery Installed:          Yes
Amperage (mA):          2273
Voltage (mV):          11691
System Power Settings:
AC Power:
System Sleep Timer (Minutes):          10
Disk Sleep Timer (Minutes):          10
Display Sleep Timer (Minutes):          10
Wake on AC Change:          No
Wake on Clamshell Open:          Yes
Wake on LAN:          Yes
Current Power Source:          Yes
Display Sleep Uses Dim:          Yes
PrioritizeNetworkReachabilityOverSleep:          0
Battery Power:
System Sleep Timer (Minutes):          10
Disk Sleep Timer (Minutes):          10
Display Sleep Timer (Minutes):          10
Wake on AC Change:          No
Wake on Clamshell Open:          Yes
Display Sleep Uses Dim:          Yes
Reduce Brightness:          Yes
Hardware Configuration:
UPS Installed:          No
AC Charger Information:
Connected:          Yes
ID:          0x0100
Wattage (W):          85
Revision:          0x0000
Family:          0x0085
Serial Number:          0x001225b8
Charging:          Yes
Thanks!

Does it shut down with the power adapter attached? What color is the power adapter led?
Have you tried a SMC reset?
http://support.apple.com/kb/ht3964
Ciao.

MacBook pro shuts down at 50% battery life!

MacBook Pro shuts down at 50% battery left! Any suggestions. When in use it is usually plgged in

Reset SMC.
http://support.apple.com/kb/HT3964
Choose the appropriate method.

IPhone 5 shuts down at 20% battery life

This started after installing iOS8 (currently on iOS 8.1.1): At around 20% battery life, if I'm using any app at all the phone will shut down like there's no battery left. It will not restart. Plug it into the charger and get the display showing there's no battery life and it needs charging. After about 30 seconds, phone powers back up and shows 20%+ battery.
I have tried draining it to shut down, but it's hard to get it past 20%. I have made sure there were no background apps running, turned off just about everything I could. No joy. And this never happened under iOS7; it started right after I installed iOS8.
I've seen threads on this behavior, but no definitive answers. Thoughts?

Had this same issue repeatedly. Had Verizon swap my phone 3 times. Same issue each and every time. Phone turned off at either 15-20% and I had to plug it in for a few minutes for it to boot back up. I Tried everything the reps suggested 2-3 times. Figured out there is NO way that this issue could be happening three times in a row. Found the fix though. It was one of my apps that was the problem. I had 6 apps I couldnt delete due to data that was on them. I deleted the rest of the apps one at a time and reinstalled them fresh. There was no way for me to know which app was the cause- I would have had to wait after each app removal until the battery went to 20 percent and see what happens. Being I deleted, maybe 30-40 apps, that would take too long. Before, each time I restored my iphone with each swap, I was putting the bad app back on. Being that I deleted the bad app, and reinstalled fresh, I have not had the issue since.

IPhone 5 shutting down at 45% battery life

My iPhone 5 has been shutting down when it's at about 45% battery life, no low battery warning, just shuts off. When I try to power it back on, it tells me the battery has drained and I need to connect the charger. After connecting the charger it comes back on, again showing that it's at 40something% battery life. Is anyone else experiencing this problem?

Well if it is a software issue then I would restore the iphone. Restoring the device SHOULD clear up any issues if it is software related. If that doesn't work I would take it into an apple store. Since its still under warranty, let them take a look at it.
Not sure if this has anything to do with it, but Apple recommends that you drain the battery at least once a month and charge to a full 100%. Keeps the battery calibration correct ive been told. Which yours could be just wack ha because of a software issue. Try the restore.

Iphone 4s shutting down with 18% battery

I have iphone 4s and upgraded to IOS 6 . Now my phone is shutting down when battery % is 18% . Any one facing same issue , If yes pleas help me

Hey guys i just bought an iPhone 4s with iOS 5.1, the battery life is not that great i waould say. Even with minimal usage i barely get through the day. I also received a notification for update to iOS 6.1.3. But I haven't updated as yet because i am still sceptic that updating might not resolve/improve battery life.
What do you suggest guys???
@ Espimentel - Hows ur battery life with iOS6.1.3?
Thanks in advance guys.
Appreciate your valuable feedback and suggesions on it.
Rhe.

IPhone 5 shuts down with 20% battery life

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