Was it the iPhone 6S? I think Apple had a recall on some of those for power issues.
I'm still bitter about losing the cheaper three year contracts..... just because the iPhone battery could not last that long.
My iPhone 3GS battery outlasted 3 year contracts, and my iPhone 5 is still usable!
Before I even read the ..... part of that I was thinking there's no way my iphone battery would last 3 years! HA! But, they're just so pretty and have so many apps. I love you iphone ❤️