iPhone bought in July 2024 has the manufacture date of December 2023. Does it have any impact on phone performance or battery?

Purchased two 15 pro’s from Apple Store in July 2024. While navigating through the battery app, I noticed that manufacture date under Battery->Battery Health is ‘Dec 2023’. The other phone has ‘May 2024’. I am experiencing battery drain and wanted to know if the 6-8 month gap between manufacturing and first use has any impact on battery.

Regards

Vidya Sagar