After a thread appeared on Reddit earlier this month saying that your older iPhone could get a speed boost if you replace the battery, some “Apple is evil” conspiracy theorists went into overdrive claiming Apple was slowing down old iPhones in order to get you to upgrade to new devices.
本月早些时候，Reddit 网站披露一条消息，该消息称，给苹果手机换上新电池会提升手机的速度，这下就给了“苹果阴谋论”分子们兴风作浪的机会，他们说苹果公司之所以这样做是为了让人们去买更新一代的手机。

As TechCrunch points out, this motive would be absurd. But Apple did confirm to the site that they do slow down older iPhones with battery issues in order to provide a better user experience:
据科技博客报道，这个说法是很荒谬的。但是苹果方面称他们是有意减缓苹果手机的运行速度，为了给用户带来更好的体验。具体说法如下：

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.[/en
]我们的目标是为了给用户提供更好的体验，其中包括提升整体性能以及延长手机的寿命。在寒冷的环境中，锂电池的供电能力就稍显不足，无法满足如今用户的需求。随着电池老化，其储电能力也随之下降，因此，设备会自动关机来保护其零件。

[en]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.

去年我们针对iPhone 6, iPhone 6s 以及 iPhone SE在某些情况下突然关机推出了一些功能，如今的iPhone 7也会继续沿用这些功能。

（翻译：进击的Meredith）