Doron Myersdorf, CEO instant-charging battery startup StoreDot, said that "smoothing out" means that phones will reorder incoming commands to make sure not all of them are done in parallel.
Singapore Polytechnic student Kirstin Yip, 19, who has owned three iPhones, including the 6s and 7 models, said: "As a millenial, I'm always on my phone, so fast performance is important to me".
While Apple has now admitted this is an issue, customers will rightly be angry it's taken the company so long to come clean.
REUTERS/Jason ReedA new Rose Gold iPhone 7 Plus with dual cameras is shown in Australian's flagship Apple store in Sydney, September 16, 2016 as the iPhone 7 range goes on sale for the first time.
"Our goal is to deliver the best experience for customers, which includes overall performance and prolonging the life of their devices". The reports are particularly troubling because any perceived slowdowns by iPhone users might tempt owners to upgrade their entire device instead of replace the battery.
In a statement released to The Verge, Apple said it was throttling to prevent devices from "unexpectedly shutting down" and "to protect its electronic components".More news: 'The Office' revival is reportedly in works, but without Steve Carell
So, rather than planned obsolescence as many had assumed, it turns out there's a good reason for throttling performance.
"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", Apple said in an emailed statement to Reuters.
Now affected models are iPhone 7, iPhone 6, iPhone 6s and iPhone SE, with other models potentially receiving the same feature in the future.
Prof Subodh added that a typical lithium-ion battery is rated up to a thousand charging cycles, which averages to a battery life of about three years if a phone is charged once a day.
Apple has acknowledged that the company slows the operations of older phones to help device batteries continue to perform as they age.
However, because Apple also markets itself as one of the best in terms of customer service, an additional support for battery fix should not be as drastic. Or will they still upgrade to a new iPhone?