Do you have an iPhone that suddenly feels ... slower ... than ... it ... used ... to?

There might be a good reason for that, Apple confirmed to media outlets Thursday: The company is deliberately slowing down some iPhones, albeit for a good reason.

The batteries in older phones start to lose their oomph, especially if the devices have been repeatedly exposed to extreme temperatures. Phones used to abruptly shut themselves off if too much was asked of their decrepit batteries, since that helped protect sensitive electrical components.

Beginning with a software update it pushed out last year, however, Apple tried a new tactic: slowing down devices during moments of high demand so their beleaguered batteries could keep up.

Heres how the company explained it in a statement to TechCrunch :

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. Weve now extended that feature to iPhone 7 with iOS 11.2, and plan to add support for other products in the future.