Why is my iphone SE getting very slow?

Over the last few months, my iPhone SE that I bought around 4 years ago has started to get very slow at times, particularly when using the camera (but other apps e.g. Reminders too), sometimes to the point of completely freezing. It has 128 GB capacity with 80.5 GB available, and I keep it full up to date with software. Switching off and on again does not solve the issue.


I was wondering whether the battery health could be the issue, and whether it would therefore be worth investing £60+ in a new battery, or whether I need a new phone. Before I fork out for new battery, I was wondering if anyone could tell me the likelihood of this fixing the problem. Currently the battery health is 78% max capacity (and Apple recommend I replace it), but I wonder whether this would only help with length of time between charges, and not the speed of the phone, as "Peak Performance Capability" is displayed in the Battery Health and Charging section, which I understand indicates that the battery is currently supporting normal peak performance, and there is no throttling going on.


Any advice much appreciated, thank you!

iPhone SE, iOS 18

Posted on Feb 23, 2025 9:16 AM

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Question marked as Top-ranking reply

Posted on Feb 23, 2025 9:24 AM

Apple indeed does recommend you replace the battery at 80%, so you are already overdue.


As your battery health degrades, so can its ability to deliver peak performance. Slow downs can very well be the cause of a significantly degraded battery.


A battery replacement will help with both the amount of use between charges and any other issues caused by the battery.


Now a new battery will make your iPhone last another 2-3 years.


I would start by getting a battery replacement at your nearest Genius Bar or Authorized Service Provider.


iPhone Battery Replacement - Apple Support

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Question marked as Top-ranking reply

Feb 23, 2025 9:24 AM in response to lovethehills

Apple indeed does recommend you replace the battery at 80%, so you are already overdue.


As your battery health degrades, so can its ability to deliver peak performance. Slow downs can very well be the cause of a significantly degraded battery.


A battery replacement will help with both the amount of use between charges and any other issues caused by the battery.


Now a new battery will make your iPhone last another 2-3 years.


I would start by getting a battery replacement at your nearest Genius Bar or Authorized Service Provider.


iPhone Battery Replacement - Apple Support

Feb 23, 2025 9:27 AM in response to lovethehills

Currently the battery health is 78% max capacity


The battery needs to be replaced. That may or may not solve some or all of your issues, but it is the first thing that you should do. Post back to let us know how things are working.....after...you have had the battery replaced at the Genius Bar or an authorized Apple service shop.


You can find a list of authorized shops in your area using this link: Find Locations


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Why is my iphone SE getting very slow?

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