An old battery may be slowing down your iPhone

Peter, 11 December 2017

Just because something sounds like a conspiracy theory, it doesn’t mean it’s not true. Many people complain that their iPhones get slower and slower with every iOS update, but it turns out that they may have been blaming the wrong thing.

It may be the battery – as it ages and loses capacity, the iPhone reduces the clock speed of the chipset to maintain battery life (which obviously tanks performance). And the cure is obvious enough, just change the battery.

Here’s the evidence presented by Reddit user TeckFire and his iPhone 6s:

iPhone 6s with the: old battery iPhone 6s with the: new battery
iPhone 6s with the old battery and the new battery

This seems to be related to the iOS 10.2.1 update and the notification “Your iPhone battery may need to be serviced”, which itself is related to the 30% bug – an issue that caused the reported battery charge to drop from 30% to 1% in seconds.

There’s evidence that the iPhone 6 and 6s generations slow down but the 5s and 7 are unaffected. You can use the CPU DasherX app to check the chipset’s clock speed, it should be 1848MHz. Many redditors report speeds as low as 600MHz.



Reader comments

  • Alpha
  • 21 Dec 2017
  • 64h

Samsung set a great example with Galaxy Alpha. Premium design, removable battery. I can bet that with some thinking they could design flagships with removable battery like this one.

  • Anonymous
  • 21 Dec 2017
  • JG0

And? The battery should be replaceable.

Nah, thats why stuff like Qnovo is created, keeps the battery just as new for 800 charge cycles, that is 2 years... So you are safe with performance for at least 3-4 years

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