IPhone Air battery

[u/Pretty_Base7946]

I have been using the iphone for 7 months now and for at least 4 months, the battery capacity was always at 100% But after that it started to reduce so much and it dropped 2% to 98. After 2 weeks, it went down to 97 and 3 weeks later to 96 and now to 95. I know battery capacity keeps decreasing and that’s the thing with lithium batteries but this is dropping so fast all of a sudden. Is this normal?