Battery Replacement

Click this link to schedule a battery replacement at your Apple Store Genius Bar --> iPhone Battery Service - Apple Support

DO NOT let anyone other than Apple or an actual Apple Authorized Service Provider replace your battery, even it may cost less. They do NOT have access to authentic Apple parts and some features of your phone won't work again with an inauthentic battery. Plus should you ever need service from Apple again, Apple won't touch a phone which has non-Apple parts installed.