Chosen Solution
I have a 5S that randomly shuts off and shows dead battery when it reaches around 30%. Anyone else have this problem? I know the 6S and some other iPhones have that issue because of iOS 10.. but I’ve never had the issue on an iPhone 5s before. Any suggestions to fix this? I already restored the phone.
It does sound like a battery, after all it was released over three years ago what iOS is it on?