SO easy to resolve if you are still under warranty!
Website troubleshooting sent me a text and diagnosed bad battery. I chatted online with service and here's the chat:
Me: My iPhone 5 started shutting down randomly after the ios 7 update and now i can only use it when it is plugged in. It can be at 60% - 80% anywhere and if I try to do anything it shuts down. Seems like a common problem based off of blogs.
Apple: I’m very sorry to hear that you are having trouble with your battery Heather!
Apple: I do see according to the diagnostics that your battery is not functioning properly! The good news is we can get you setup with a repair/replacement under the iPhones warranty.
Apple: In order to get you set up with a repair/replacement you could take it to a local Apple Retail Store an Apple Authorized Service Provider or we have a couple of mail in options which would you prefer?
Me: Great, Mail in would probably be best because I am 2.5 hours from an Apple store
Apple: We have 2 mail in options. The 1st option, you mail in your device and we mail you another. This takes about 5-7 business days.
The 2nd option is called express replacement, for $30 we overnight you a new device and you mail in the damaged one. We would also need to place a hold on a credit card for the retail value of the device until we received the damaged one in the mail.
Me: OK. how much would be placed on hold on the card for option 2
Apple: Somewhere around $700
I opted for mail option 2. A financial rep from Apple called me and got my card #. $715 was charged to my card. I will have my new phone tomorrow and return old one and should have my money back in a week (I had to use a debit card but credit cards will get you your money back faster). If you don't have them money option 1 is great, you just don't have your phone for a few days.
Wish I would have done this a few months ago!! Missed out on a lot of Christmas photos. :-(
SO, if you're still under warranty...get on the website and start the process. Took me a total of 20 minutes and I will never have do deal with the dying battery again.