Technically not brand new - it's about 1 month old. Bought factory unlocked from Apple. I haven't even used it as my daily driver the entire time. I'm a little concerned I'm seeing these messages on what is essentially a brand new device. When I go to Settings > Battery > Battery Health, this is what the page says (should I be concerned?):
Important Battery Message
Your battery health reporting system is recalibrating Maximum Capacity and Peak Performance Capability. This process may take a few weeks.
Maximum Capacity* 100%
This is a measure of battery capacity relative to when it was new. Lower capacity may result in fewer hours of usage between charges
* This is the reported Maximum Capacity before recalibration. Actual Maximum Capacity may be different.
Peak Performance Capability
Built-in dynamic software and hardware systems will help counter performance impacts that may be noticed as your iPhone battery chemically ages.
Optimized Battery Charging (toggled on)
Important Battery Message
Your battery health reporting system is recalibrating Maximum Capacity and Peak Performance Capability. This process may take a few weeks.
Maximum Capacity* 100%
This is a measure of battery capacity relative to when it was new. Lower capacity may result in fewer hours of usage between charges
* This is the reported Maximum Capacity before recalibration. Actual Maximum Capacity may be different.
Peak Performance Capability
Built-in dynamic software and hardware systems will help counter performance impacts that may be noticed as your iPhone battery chemically ages.
Optimized Battery Charging (toggled on)