Battery Health

There is NOTHING wrong with your iPhone Battery. On average a user can expect to lose about 1% per month in Battery Health. If you've only lost 2% in three months, you're doing better than average. One thing which is a certain truth is that Battery Health only goes in one direction and that is down. With each full cycle battery charge, batteries lose their ability to hold the same charge as new. This is what batteries do. ALL BATTERIES. When the day comes that the health of your battery dips to 80%, which it WILL do, it will then be time to pay Apple to replace the battery. Until then, there is no reason to obsess over the normal aging of batteries.

Why?

Because this is normal. Battery Health will decline on average at about 1% a month. You are doing better than average so far, since your battery should be at 97% by now.

Replace the battery when its down to 80%.