iPhone 6s will turn off 30% of battery

iPhone iOS 9.3.4/5 6 s (problem on both).

A few weeks ago, my phone has started cutting about 30-40% battery life. Then the charge screen shows if I immediately try to restart. If I wait 15 minutes and start it says there are still about 30% remaining battery and it will normally stay all the way up to 1 to 2% battery.

I ran down, let it rest for a few hours, then it loaded completely 100% while the phone was off. The problem persists.

I also did a clean restore (set up as a new phone).

Any thoughts or other people having this problem?

Tags: iPhone

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