Battery health decreased from 94 to 92 percent in just 2 days

Batteries degrade over time with usage, that's just how they work. You can expect about a 1% drop per month with average use on an iPhone.

Apple recommends replacing it when it reaches 80%

Here are some tips on maximizing battery life.

https://www.apple.com/batteries/maximizing-performance/

Harshal765 Said:

"Battery health decreased from 94 to 92 percent in just 2 days: [...]Why battery health decreased so fast"

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For Note:

About the Percentage: The percentage is a guess on Apple's part. I have seen my percentage increase by up to 3 percent. So, it is always a guestimation, and never guaranteed.