Apple was forced to give me a brand new iPhone 6s, NIB, which takes the whole "battery health" completely out of the equation. Realistically the health of the battery shouldn't even be a factor. Apple is just using it as a distraction. My old phone had 10.3.3 loaded and it had a solid 2-day battery life. All that changed was the OS and it went to a "maybe it'll last until lunch" phone. One variable in the equation, one. The OS.
Even with the new phone I still have battery issues with all versions of 13. The OS is obviously the problem, but Apple won't be bothered to remedy it, ever. They're more focused on giving their customers 10,000 emoji's instead of fixing bugs and making the phones actually work. Cause if someone doesn't have their snowman, er, snowperson holding an ice cream cone emoji all **** is gonna break loose. At one point iOS 13 was so bad that later releases of the 6s's wouldn't even turn on after they were upgraded. I mean that's one seriously huge point of failure.
Each week Apple has less and less employees working on testing and debugging than they do on creating new [mostly useless] features, so the battery bug will not get fixed. They've had how many versions of 13 released now and haven't fixed it, or even acknowledged it? Let's see, not including the first release which was the start of the problem.
13.1
13.1.1
13.1.2
13.1.3
13.2
13.2.1
13.2.2
That's seven releases they've had to correct the issue. Seven. Hasn't been fixed. They've already set the pattern, which is to ignore the issue completely.
If anyone thinks that Apple Support is even going to read this thread they are a fool. It's basically just an avenue to vent our frustrations and compare the horror stories of how bad our phones have become.
Keep in mind there is a very good chance our 6s's won't be supported in the iOS 14 release. Just like the regular 6 won't support iOS 13. They'll be a legacy product that is phased out so we're pretty much stuck with this unless we get a new(er) iPhone or switch to Android.