I have a IPhone 6 Plus purchased right at launch (September 2014). I just had apple run its online diagnostics on the battery and she said it came back at 94 percent (PASS). So no $29 dollar replacement. I have used the phone heavily, it’s dog slow and the battery life drops like a rock. This must be an error or she read the results incorrectly, right? I downloaded some Battery Life app and it said 62 percent and needed replacement. I have a Genius Bar appt to do another test but wanted to see if anyone had any feedback on this. Thanks!