IPhone is at 85 percent battery health?

So I have had an iPhone 7 for close to 19 months now. It has just recently gone down to 85 percent battery health. Is that about normal for an iPhone's battery health? I know that the critical battery health percentage is 80 percent.

How about you charge it dumass

After time phone batterys do intend to wear down. Depends to on how often use it and if you keep brightness down n if watch lot videos etc. But yea pretty normal

Batteries deteriorate.

No two are likely to wear out at exactly the same rate.

Have it replaced.