
Apple has reduced the price of battery replacements for the iPhone 6 and newer to $29, down from $79, as part of its apology over a lack of communication about the power management changes it made starting in iOS 10.2.1. The discount is effective immediately and available until the end of 2018.

iPhone users in most countries can initiate the battery replacement process online by scheduling an appointment with the Genius Bar at an Apple Store. The reduced price is also available at some third-party retailers and repair shops, as long as they are designated as an official Apple Authorized Service Provider.
After this article was published, MacRumors received a tip claiming Apple has reduced the price it charges Apple Authorized Service Providers for iPhone batteries to $5, down from $55, but some repair shops are still charging more than $29 for replacements to maintain reasonable profit margins for time and labor.
To get started, head to the Contact Apple Support page, click on See Your Products, and sign in to your Apple ID account.
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Article Link: How to Get Your iPhone's Battery Replaced at Apple Store or Apple Authorized Service Provider