Why my battery health 96

Your Battery Health is excellent. Battery Health is an inexact figure that varies with usage. You need not worry until it reaches 80% at which time you will need to make an appointment at the nearest Apple Store for Battery Replacement...

Batteries - Maximizing Performance - Apple

A further note on good battery health. The iPhone adapts to your usage/charging patterns. Having battery health at 100% could b an indicator that it hasn't detected a regular pattern. Apple deliberately limits the charge of a good battery to less than 100% to extend the battery life.

The xphone battery can also be utilized storage unit for certain forms of database groups?