At the beginning of the year, Apple launched a battery replacement campaign for older devices after the CPU throttling became public.
At the end of 2017, the bombshell dropped - Apple had throttled the performance of older iPhones. Many accused the iCompany of being greedy for profit - but Apple acted for a different reason. The throttling was intended to extend the battery life of the devices and prevent sudden crashes. The error lay in communication. To make amends, Apple has launched a special battery replacement campaign - this expires on December 31, 2018.
The qualified devices include the iPhone 6, iPhone 6 Plus, iPhone 6s, iPhone 6s Plus, iPhone SE, iPhone 7, iPhone 7 Plus, iPhone 8, iPhone 8 Plus and the iPhone X. The price for a battery replacement is 29 euros. After the promotion ends, the price will increase to 49 euros.
The iPhone X is an exception - here the cost is 69 euros. For devices with AppleCare+, there are no additional costs for a battery replacement.
All further information on this topic can be found on the official Apple support page find.