Apple will let you choose between your phone's speed and battery life

"We will tell somebody 'We're slightly reducing your performance by some amount in order to not have an unexpected restart.' And if you don't want it, you can turn it off".

It also will give them the option to turn off the throttling feature the company instituted previous year to prevent older devices from shutting down when batteries became too weak.

Yes, because Apple always includes security patches in their updates and to prevent security breaches you should always keep your iPhone updated and this update will also increase the performance of the iPhone.

Apple's Tim Cook apart from confirming in an interview with ABC News that the company intends to move foreign money back to the U.S., he finally addressed the iPhone "batterygate" scandal stating that a new system update will come out in February, that will help users to stop their iPhones from slowing down.

But he wouldn't recommend it, as the company slowed down the phones to prevent other problems, he said. The resulting uproar saw the company accused of deliberately slowing down older devices to encourage users to buy new ones, a practice known as "planned obsolescence". Apple's solution to avoid this issue is to slow the phone down. "This hasn't been done before", said Cook. There is not much new in iOS 11.2.5, so don't expect any of the big features we're still waiting for to arrive, such as Messages on iCloud and Apple's recently promised battery health tool.

"We're going to give people the visibility of the health of their battery, so it's very, very transparent".

Apple confirmed on December 20 that software in iPhone 6, iPhone 6s and iPhone SE models to deal with dangers from ageing batteries could slow down the phone's performance. "And so we deeply apologize for anybody that thinks we had some other kind of motivation". A release date for the throttling update hasn't been announced but the tech giant's CEO claims the disabling software will go into testing in February. For 2018, Apple has dropped the price of battery replacements to $29, down from $79.