IPhone 5 keeps periodically shuts off

Question

Hello,
I don’t know what is going on with my phone lately. I take good care of it, and it looks brand new. I had it for about a year and a half now, I guess since I preordered it. So it isn’t from dropping it or mishandling it either.
My phone just randomly turns off, regardless of the battery percentage or what apps I have open. I might not having anything open, as in I closed out of all apps by double clicking the home button and removing anything listed, and my phone will still shutdown, even with nothing running. This doesn’t happen too often, but it seems to happen once a week on average. It has shut down when my battery was at 50%, 38%, 20%, 12%, so there is no pattern to it.
When it does shutdown and I try to turn it on, it says I need to charge it. I plug it in and it will still not turn on when I try. I actually have to wait about 5 minutes for it to charge a little before it will allow me to turn it on. However, if I leave it sit about 30 minutes without plugging in it will turn on. I am also not one of those people who is constantly charging their battery either. I try to wait for the phone to turn off because the battery is truly dead, at 1% and then charge it. I know many people are going to say that it doesn’t matter about charging the battery when it isn’t fully drained, but I still believe it does.
Anyway, I have been having this issue for several months now. It seems to be since Apple did the last OS patch, or right about there. I never had the issue before this.
Here is one of the dump files from the last crash, this one is saying safari caused it, which I did try to launch safari when it crashed, but this is not always the case. Curious if anyone has any suggestions or if Apple can possibly put another patch through to fix this. I have been reading where other people seem to recently have this issue as well.
Thanks,
Chris
Incident Identifier: 6001528B-C521-43B5-8BDE-141BC2F2856B
CrashReporter Key:  afe424b8cf007bfb2768225719ffbfd069e911a5
Date:                2014-02-01 05:33:49 -0600
OS Version:          iPhone OS 7.0.4 (11B554a)
mediaserverd: com.apple.audio.MobileSafari-604(com.apple.mobilesafari).isplaying            NoIdleSleepAssertion == 255, held for 00:23:23
mediaserverd: com.apple.audio.VAD Aggregate Device UID 27.isrunning  NoIdleSleepAssertion == 255, held for 00:23:33
SpringBoard: com.apple.springboard.idle          NoIdleSleepAssertion == 255, held for 00:00:04
backboardd: MobileSafari[604]-604 [0x16660980]        NoIdleSleepAssertion == 255, held for 00:23:43
Hardware Model: N42AP
Awake Time: 05:13:38 (18818)
Standby Time: 21:01:04 (75664)
Partial Charge: 0
Capacity: 0
Voltage: 3527 mV

Answer 1

This is happening to my phone too! and I've barely had it for 6 months and I haven't dropped it or done anything that may have damaged it! it's very annoying.