Q: iPhone5 shuts down at 20%-30% battery since new IOS7 was installed

I am having exact same problem as OP. It's been happening for a while too. I figured it might just be my phone, but looks like I'm not alone. Apple please release a fix for this ASAP.

I've got the same problem, iPhone shuts down at ~35% and shows the 'plug in charger' sign. In about 10 minutes I can restart the phone (still 35% battery left), but within minutes it will shut down again. When I plug in the charger, it starts up and shows 35% battery left. Yeah, right...

Apart from this with iOS 7.0.4 my battery will lose about twenty procent and go from 81% to 62% overnight while in flight mode!!

@apple this is really annoying! Please fix this.

same problem

http://www.youtube.com/watch?v=SW-uIWlg6y8

I had the same issue with my iPhone 5. One thing I observed this shut-downs was more common when the phone is exposed to cold weather conditions. Just an observation, no scientific research though.

I don't agree. I live in SW Florida. No cold here. Or at least temperatures that would be low enough to affect an operating system. 50's, 60's, etc. 

I'm so sick of my phone shutting off all the time at 20-30% and burning ridiculously fast. Yes, I double click the home button and flip all open apps to close on a daily basis and nothing helps.   

I thought this was the case, and/or only when it was on LTE (i.e. off of wi-fi).  But then just the other night it died with over 20% left when I was at home on wi-fi.  When I plugged it in, it immediately jumped up to over 30%.

Apple, you need to fix this problem ASAP!!!!   This is unacceptable that you've let this significant bug exist for so long. My phone kept shutting down at 30% when I was using maps and because of that I couldn't figure out where I was going.  Very bad experience and your fault.  Fix this now!!!

I don't weigh in much but I feel the need to here. Since installing IOS7 I've had all of the above problems listed and even after a full hardware reset the problems are still persistent and not limited to:

-phone shutting down with 20-35% battery left and showing the "please plug in your phone screen". Then when plugged in all is ok with the phone.

-battery % showing (for example) 7% left and then when plugged in jumping to 30% or more.

- huge drops in battery % when phone is idle & in flight mode

- restarting itself randomly in the middle of app use (no one specific app that is)

Clearly something is plagued in the OS in terms of battery reporting. Apple, please take notice to this and fix ASAP. For someone who travels an awful lot in multiple countries it is a huge burden when I loose access to maps &/or other pertinent info.

So i noticed that my iOS crashes more when I am outside in the cold. I can not understand why this is the case. But I took a series of videos yesterday in the house. I went outside with 40+% batt. took some video of the kids sledding and bam a crash within 30 seconds of video.

I did another test after giving the phone a little charge. 48%. went outside and bam crash. I am not saying that it never crashed inside in the warm. Just seems to be easily triggered when out in the 27 deg weather.

Anyone see this?

If I was not in contract I would really think to switch. Once the contract is up I will think real hard.

Hello Apple. I know there are only 1000 of the millions of customers complaining. But you are losing some long timers here.

Happening to both mine AND my wife's iPhone 5's! Really annoying and frankly, feels unsafe when we are out travelling. I had it shut down this morning before my alarm went off. Thankfully, I had went to the bathroom and noticed it otherwise..I would have been late.

Please, Apple, address this!

I have also had this issue and noticed it is more prominent in cold weather.  It was anywhere from 10-20 degrees fahrenheit outside and my phone was in the car for a couple hours and when checking email it powered down, I tried to power it back on and it showed the screen that indiciates you need to plug it in.  This was with about 80% battery left.  I noticed that it would power off anywhere under 20%, so this was a surprise and I hope they fix this soon otherwise I will be looking at other non iOS phones.

2 days after a manual install of iOS and the problem hasn't come back. Thanks!

Problem still exists, despite trying the solutions like re-installing iOS.  Apple....please fix the problem you created!  This is unacceptable.  Apple, fix this now.

I had the same exact problem for a couple days then the worst happen, seems my battery expanded and made my screen pop up off the bezel. I spoke with apple and the rep told me even though my phone is out of warranty they would still replace the phone due to the expanding battery.