iPhone 6 Plus keeps restarting after battery drain
Hello.
I recently was talking with FaceTime with my iPhone 6 Plus charging (the battery was very low). I unplugged it for a few seconds so I could connect it to my Mac, but it shutted down. Now it keeps doing the same thing:
-Boot up
-Shut down
-Show battery icon with red
And it repeats.
Well, it didn't start doing this long ago, only a few minutes. What should I do? Leave it for a few hours or do something? Please help quick!
Info:
iPhone 6 Plus with iOS 8.1.1 with 16 GB memory
By the way, when I unplug it, it will stop doing it.
iPhone 6 Plus, iOS 8.1.1