The company don't recommend you use the feature, though.
A few weeks back, giant Apple has apologised for
slowing down the performance of older iPhones and promised to slash the cost of replacement batteries as one of a number of measures “to recognise their (customers’) loyalty and to regain the trust of anyone who may have doubted Apple’s intentions”.
In a statement back in December, Apple apologised for the performance issues affecting some customers and sought to clarify the situation, saying “we have never — and would never — do anything to intentionally shorten the life of any Apple product, or degrade the user experience to drive customer upgrades”.
This resulted in Apple facing multiple lawsuits (via
The Verge), but this week the company's CEO Tim Cook announced that users will be able to control the battery slowdown themselves.
In an interview with
ABC News, Cook stated the following:
"We’re going to give people the visibility of the health of their battery so it’s very, very transparent. This hasn’t been done before. [...] If you don't want it, you can turn it off."
However, standing by the explanation in their apology letter, Cook still recommends that the feature is left on, as it will cut down on the majority of unexpected shutdowns on your phone.
The latest update on the iOS11 is expected to arrive this March.
