Why is my iPhone 15's battery health decreasing rapidly after 7 months?

rutuja113 wrote:

My i phone 15 battery health is drain 95% in7 month with5hr used maximum today is 96on 1hr after that 95%in 1hr?

What is the cycle count? Divide it by 50, then subtract the result from 100 to see what the approximate max capacity should be.

Note that 95% can mean anything from 95.0 to 95.9, because the display truncates, it does not round. Thus, dropping from 96% to 95% is only a 0.1% drop.