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Why are iPhones getting slower over time?

Many iPhone users often feel frustrated when their phones slow down over time, even though apps and storage remain stable.

Báo Thanh niênBáo Thanh niên22/05/2026

In reality, iPhones can still function well, charge, and have good battery life. However, there are some potential reasons why phones may slow down over time that users can consider.

One of the most noticeable signs is a significant slowdown in iPhone performance when the battery level drops below 80%. To check your iPhone's battery health, go to Settings > Battery > Battery Health. If the maximum capacity is below 80% and performance management mode is enabled, the slowdown is not just a figment of imagination. Replacing the battery can restore speed to your iPhone, but be aware that using a low-quality battery can cause new problems such as overheating or unstable operation.

iPhone ngày càng chậm theo thời gian là vì sao? - Ảnh 1.

There are many different causes, but old batteries are a common one.

PHOTO: APPLE

Additionally, storage capacity also affects iPhone performance. When memory is nearly full, the phone may still function well for basic tasks, but will struggle with updates, using the camera, or switching apps. Users can check their storage capacity in Settings > General > iPhone Storage to identify the problem.

When hardware isn't the issue slowing down your iPhone

Photos and videos are often blamed, but app caching is also a major cause of sluggishness. Furthermore, new iOS updates often bring many new features and services, but on older devices, this buildup can slow down the phone. Newer apps, in particular, often require more resources, and this incompatibility can be one of the reasons why iPhones slow down.

High temperatures can also trigger performance limitations, causing iPhones to slow down after prolonged use. Persistent overheating is also a warning sign to pay attention to. If your iPhone is running slow and hot at the same time, try restarting the device to clear any temporary system states.

Finally, if you notice symptoms like random restarts or unstable operation, it could be due to a more serious hardware fault. Replacing the battery or updating the software might help improve performance, but if the problem persists, it's time to upgrade your device.

In short, iPhones slowing down over time is no mystery. Aging batteries, full storage, accumulated software, and resource-intensive apps all contribute to this. Understanding the causes will help users find effective solutions, from replacing the battery and optimizing performance to deciding to upgrade their device.

Source: https://thanhnien.vn/ly-do-iphone-ngay-cang-cham-theo-thoi-gian-185260522010918682.htm


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