The update, according to Cook, will arrive next month in a developer release prior to a global rollout-adding "this hasn't been done before". He explained that they released a code about a year ago that would "take something off of performance" to prevent unexpected restarts and shutdowns for older iPhone models that already have unhealthy batteries.
"We're going to give people the visibility of the health of their battery so it's very, very transparent".
Developer updates, or betas, are how Apple tests out new features and software updates before broadly rolling them out to the public. The company apologized for slowing down the handsets and they have come under a lot of criticism for doing it and not telling people. As a gesture of goodwill, Apple has offered discounted battery replacements for the iPhone 6 and above. However, Apple CEO, Tim Cook has recently announced that there will be an update to the iOS that will allow users to turn off the performance throttling.
In its earlier apology letter, Apple said that it planned to give users more insight into what was happening with their batteries, but there was no mention of making throttling optional.
Apple said that as required by the new tax law, it will pay $38 billion in taxes from its massive cash holdings overseas.
The problem is that lithium-ion batteries - the type of rechargeable batteries used in Apple iPhones as well as other smartphones, tablets, and notebook computers - degrade over time. On top of that, a battery that's been sufficiently, as Apple puts it, "chemically aged" might not be able to provide enough power in a given amount of time to the device.
Cook says that the company does not encourage users to turn it off, and reiterates that their intentions are "in service of the user".
The company has been under increasing pressure to make United States investments since the 2016 presidential campaign, when Mr Trump targeted the iPhone maker for making products in Asian factories. Replacing the older batteries with new ones will bring back the older iPhones' peak performance.
Sources expect this iPhone battery management upgrade to be included in an update which could be out as soon as March of 2018.