Apple on Wednesday admitted to slowing down older iPhones due to battery issues.
The company says a software feature released last year makes your phone operate more slowly to offset problems with its aging lithium battery.
Older batteries don't hold their charges as well as newer batteries. This can cause problems when the charge is low or the temperature cold. It also means your phone is at risk of unexpectantly shutting down.
To prevent these issues, Apple reportedly says it has created software that manages batteries as they age.
The software is said to slow down your devices to keep them functional but only when needed. The iPhone SE, iPhone 6, and iPhone 7 are all impacted.
In a statement to CBS News Apple said:
"Our goal is to deliver the best experience for customers, which includes overall performance and prolonging the life of their devices. Lithium-ion batteries become less capable of supplying peak current demands when in cold conditions, have a low battery charge or as they age over time, which can result in the device unexpectedly shutting down to protect its electronic components.
Last year we released a feature for iPhone 6, iPhone 6s and iPhone SE to smooth out the instantaneous peaks only when needed to prevent the device from unexpectedly shutting down during these conditions. We've now extended that feature to iPhone 7 with iOS 11.2, and plan to add support for other products in the future."