How to turn off fast charging on Xiaomi Redmi 9T: 5 proven ways

Xiaomi Redmi 9T is one of the most popular budget smartphones with support for fast charging technology (up to 18 watts). However, not all users want to use this mode: some are afraid of battery wear, some do not like the heating of the device, and some simply prefer a slow but gentler charging. In this article, we will discuss all possible ways to turn off fast charging on the Redmi 9T, including hidden settings and alternative methods.

It is important to understand that the manufacturer does not always provide a direct option to deactivate fast charging in the standard menu, ADB-We will describe each option in detail, identify the risks and provide safety recommendations.

Why do users turn off fast charging on the Redmi 9T?

Quick Charge technology (or its equivalent from Xiaomi – Fast Charge) does speed up the charging process, but it has a downside, and here are the main reasons why owners of Redmi 9T are looking for a way to turn it off:

• 🔋 Battery wear: Fast charging increases battery load, reducing battery life by 15-20% after 300–500 cycles.
• 🔥 Overheating of the device: With intensive charging, the body temperature can rise to 40-45°C, which is uncomfortable when used.
• ⚡ Instable power: In regions with frequent voltage surges, fast charging can cause failures or even damage to the power controller.
• 💰 Savings on chargers: Not all users are ready to buy original power supplies with Quick Charge 3.0 support.

In addition, some owners note that when you turn off fast charging smartphone is less likely to turn off from overheating during games or video shooting, this is due to the fact that the power controller is less loaded.

Method 1: Disconnect via standard settings (if available)

Some MIUI firmware for Redmi 9T (especially on global versions) have a hidden option to turn off fast charging.

1. Open Settings → Battery and Performance.
2. Go to the Charging section (or Charging settings).
3. Look for a Fast Charging or Fast Charging switch.

If you don't have one, don't worry: most versions of MIUI 12/13 for Redmi 9T don't have one, so move on to the following methods.

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Before changing your charging settings, make sure that the battery is at least 30% charged, which will help to avoid suddenly turning off the device during manipulation.

Method 2: Use of an engineering menu (for power users)

The Engineering Mode allows you to change hidden system settings, including charging settings. On the Redmi 9T, this method only works on firmware up to MIUI 13.0.5 - newer versions can block access.

1. Open the Phone app and enter the combination: ##4636##.
2. In the menu that appears, select Battery Information.
3. Scroll down and find Fast charge config or Charging control.
4. Change the value from Enabled to Disabled.
5. Save the changes and restart the smartphone.

⚠️ Warning: Incorrect actions in the engineering menu can lead to malfunctions in the device. If after changes the smartphone began to charge too slowly (less than 1% per hour) – return the settings to the original state.

Record the current battery settings (screenshot)

Have a charged battery (>50%)

Know the firmware model (MIUI 12/13/14)

Prepare a backup copy of the data

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Method 3: Disconnection through ADB-Teams (for advanced teams)

If the engineering menu is not available, you can use Android Debug Bridge (ADB), which requires connecting the smartphone to your computer and installing drivers.

1. Enable Developer Mode on Redmi 9T: Go to Settings → About Phone. 7 times click on MIUI Version. Return to Settings → Additional → Developer. Activate Debugging on USB.

Connect your smartphone to your PC and open the command line (Windows) or terminal (Mac/Linux).

adb devices

The serial number of the device should appear.

adb shell settings put global fast_charge_enabled 0

Reboot your smartphone.

To return fast charging, use the same command by swapping 0 for 1. ⚠️ Note: Some of the updates after the update MIUI setting ADB Check them after each update.

Method 4: Using Third-Party Applications

Google Play has apps that allow you to control charging options, such as AccuBattery or Battery Charge Limit, but their capabilities on the Redmi 9T are limited:

• 📱 AccuBattery: Shows current charging speed and temperature, but can't directly disable Fast Charge.Useful for monitoring.
• ⚡ Battery Charge Limit: Allows you to set a charging limit (e.g. up to 80%), but does not affect speed.
• 🔧 Quick Charge Disabler (requires root): The only app that can turn off fast charging completely, but only works on rooted devices.

If you are not ready to get root rights, these applications will help only indirectly – for example, limit the maximum level of charge, which also prolongs the life of the battery.

Method 5: Physical shutdown (replacement of charger)

The easiest and safest way to do this is to use a charger without Quick Charge support.

For the Redmi 9T, the best option is a 5V/2A charger, which provides a balance between speed and safety. Avoid cheap no-name power supplies: they can not only not turn off fast charging, but also damage the controller.

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Using a charger without Quick Charge is the only method that does not require firmware changes and is completely safe for the device.

What do you do if nothing helps?

If neither of these methods worked, your firmware might block the changes, and then there are two options:

1. Update MIUI: Newer versions of firmware sometimes have additional charging settings. Check for updates to Settings → System Update.
2. Install custom firmware: LineageOS or Pixel Experience, for example, often offer more flexibility in settings. However, this requires unlocking the bootloader and firmware experience.

It's also worth checking if the problem is hardware, because if the smartphone is always warming and discharges quickly, it might be a battery that's worn out or the power controller is defective, and that's where the diagnostics at the service center will help.

FAQ: Frequent questions about turning off fast charging on Redmi 9T