Good day :)
Did you meet Original iPhone Battery failed to show Battery health Data after upgraded to iOS 13 ?
This is iOS 13 system Bug Problem, even you replace genuine iPhone battery, this problem will happen still.
Bizbee Lab tested all our stock for iPhone Original Batteries:
Our Original iPhone Battery don't have these issue at all: 100% Battery Health Status + 100% Large Capacity + Ultra Long endurance time.
We have already found solution for this problem:
Write the data to new battery by Battery Tester JC-B1 or Use 3utool to read original data.
Warim Tipps: Write the four information: manufacturer code, manufacturer, time, serial number from the original old battery to the replaced one.
Here is our Battery Health Test Result: