Feedback on Apple $29 Battery R&R

Yesterday I replaced the battery in my iPhone 6. It works a lot faster than expected.

When I arrived at the Apple store, the tech ran a diagnostic test and reported that the battery was operating at 99%. This was not the battery charge since I could see the battery was half charged. I found the results of the diagnosis perplexing. This is my 3rd iPhone and I've found that historically the battery shows significant degradation after year 2. The tech asked if I ever performed a restore on the phone and I said, yes, about 2 times a year. The tech then suggested that changing the battery may not improve the performance. I chose to pay the fee and get the battery replaced.

The process took 10-15 minutes to check in with the Tech Rep and 1 hour to R&R the battery.

Results: The phone works considerably faster than before. I used to wait up to 5 seconds for the camera to come on and focus after hitting the camera app. This also applied to other apps. Apps now open 2-3 times faster than before.

Additional info:
11.9GB used of 16GB
Version 11.2.6
Apps added to iPhone - Uber, Vimeo, Sonos, Activity, Beddit

 

It appears the celebration was premature. The iPhone is returning to it's former, slow, self.