Apple announced Wednesday that it will give partial refunds to some customers who paid for out-of-warranty battery replacements. Those who purchased new batteries for their iPhone 6 or newer devices from Jan. 1, 2017, to Dec. 28, 2017, will receive a $50 credit, but only if the replacement was done at an "authorized Apple service location." This includes any Apple repair center, Apple store or authorized Apple service provider. Consumers eligible for the refund will be notified via email by the Cupertino-based company within the next two months. The payment will be issued to the credit card used to pay for the battery or as an electronic funds transfer. Last December, Apple admitted to slowing down older iPhones to prolong their battery life. Following user backlash, it dropped the price of out-of-warranty battery replacements for anyone with an iPhone 6 or newer to $29. "As lithium-ion batteries chemically age, their ability to hold a charge diminishes. This may result in shorter amounts of time before a device needs to be recharged," Apple said in a letter to the U.S. Senate in February. "We do not want our customers to experience interruptions in the use of their iPhones, whether that is making an emergency phone call, taking a picture, sharing a post or watching the end of a close game." If you believe you're eligible for a credit from Apple and haven't been contacted by the company by Aug. 1, contact the company by Dec. 31, 2018.