2 biggest reasons why older Apple iPhones become slow

Several folks are angry at Apple for not informing them that their iPhone will get slower after the fix.

Using the Geekbench 4 tool, the performance watchdog found that iPhones with older batteries experienced drops in CPU performance when running certain versions of iOS.

The cluster of benchmark results under 2,500 when running iOS 10.2.1 suggests that Apple's software update caused a decrease in phone performance compared to iOS 10.2.

The effect was more pronounced with iOS 11.2 and was seen with the iPhone 7 as well, which was launched only previous year. The issue largely impacted older generation phones such as the iPhone 6 and 6S which previously had suffered a pesky bug that caused early shuts down. The slowing down of the processor speed has more to do with the battery on your older iPhone. Poole adds that Apple appears to have added a similar fix to iOS 11.2.0 for the iPhone 7. It was put in place in iOS 10.2.1 and oversees the CPU/GPU speed and power.

A week ago, one user explained this issue on Reddit. Still, as smartphones continue to become such a central part of so many people's lives, examining their potential performance flaws should become a serious concern for users. With batteries getting older on iPhones, it gets more hard for the hardware to run on lower voltage.

However, the shorter the battery life and the more a user has to charge it, such as topping up during the day as well as charging over night, the faster the battery will age in relation to the smartphone. Aging batteries may also not be able to support more complex processors because they produce less of a current.

A Reddit poster hypothesised the issue may have arisen from the iPhone 6s battery replacement program of 2016.

Poole is referring to the update Apple rolled out in iOS version 10.2 created to address an iPhone 6s battery issue that was causing the handsets to shut down for no apparent reason.

Poole wrote: "The difference between 10.2.0 and 10.2.1 is too abrupt to be just a function of battery condition".

It's a question that comes up again and again because iPhone batteries aren't easy to replace, and a new report from a popular benchmarking app suggests the answer is yes. Thanks to the demand and spiking popularity of the smartphone, Apple analyst Gene Munster says the average selling price of the iPhone is expected to go all the way up to $740.

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