Review Outlaw
If you are the Techie Type and want to try to fix yourself.
Replacement Battery Kit for Iphone 6:
Looks like they might have Recall of some sort Check out this link
https://www.engadget.com/2016/11/21/apple-replacing-a-small-number-of-iphone-6s-batteries/
So i was super happy to get the new Iphone 6s until i Found out it randomly shut off or turn off and i would have to manually turn it back on. I missed a Alarm because the phone was off at that point i knew i need to come up with a fix. Here is the only thing that has worked for me. It’s a huge pain but the only thing that worked for me.