He who is Jolly Roger said on 4 Jan 2018 22:23:50 GMT:

The CPU speed isn't only cut in half, but on a curve, and it's not
permanent

This is a good topic for adult logical discussion...

Title:
How to take advantage of Apple's $29 iPhone battery replacement program
right now
URL:
http://bgr.com/2018/01/01/iphone-battery-replacement-29-how-to-iphone-slowdown-scandal/
Quote:
"There is no way to toggle Apple's hidden throttling on or off
within the company's iOS software. Instead, the only way to disable
an iPhone slowdown is to install a new battery in your phone."

This was already referenced in the iOS newsgroups he
Title:
For anyone who still thinks the iPhone throttling isn't *permanent* - read this article
URL:
https://groups.google.com/forum/#!topic/misc.phone.mobile.iphone/wq4r6ALKewE