I want to change my battery

We assume that Battery Health is now under 80% on your phone. Make an appointment at the Apple Store or take the phone to an authorized Apple service shop.

Battery replacement cost is $89 (U.S.)

You can find a list of authorized service shops in your area using this link: Find Locations

Apple Inc says: "We can replace your iPhone battery for a service fee. Our warranty doesn't cover batteries that wear down from normal use."

iPhone Battery Repair & Replacement - Apple Support (IN)