How to turn off fast charging on Xiaomi Redmi Note 8T: 5 proven ways

Why do users want to turn off fast charging on the Redmi Note 8T?

Xiaomi Redmi Note 8T features Quick Charge 3.0 fast charging technology that can restore battery power to 50% in just 30-40 minutes. However, not all users are happy with this feature. The main reasons why owners want to deactivate it are due to the extension of battery life, overheating of the device during charging and even unstable operation of some models of chargers.

Fast charging, despite being convenient, puts additional strain on the lithium-ion battery. Research suggests that using fast charging can reduce battery life by 15 to 20 percent after 1 to 1.5 years of active use. This is especially true for low-end smartphones, where manufacturers are saving on component quality. In the case of the Redmi Note 8T (Model 2019), many users note that after a year of heavy use, battery capacity drops to 70 to 75 percent of its original capacity.

Another common problem is that the case overheats while charging, and if you notice that the phone heats up to 40 to 45°C (you can check it with apps like AIDA64), it can affect not only the battery, but also the performance of the Qualcomm Snapdragon 665 processor, in which case turning off fast charging can help reduce the temperature by 5 to 10°C.

Method 1: Disconnect via Xiaomi’s standard settings

The easiest and safest method is to use the built-in MIUI options, but not all firmware versions support this directly. If you have MIUI 12 or later installed, follow the instructions:

1. Open the Settings app (cog icon).
2. Go to the Battery and Performance section.
3. Select the Battery Settings item.
4. Find the Quick Charge option (could be called Quick Charge or Turbo Charge).
5. Move the slider to the off position.

If Fast Charging is not on the menu, it means that your version of MIUI does not support software shutdown, and you will have to use alternative methods (see the following sections).

Check the version of MIUI in Settings → About the phone

Update your firmware to the latest stable version

Try resetting your battery settings (see Section 4)

Use the Engineering Menu (Section 3)-->

⚠️ Note: On some custom firmware (such as LineageOS or Pixel Experience), the fast charging option may be in the Additional Settings section. → Be careful: not all custom builds work correctly with the original Xiaomi chargers.

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

If the standard settings don't work, you can try turning off fast charging via the engineering menu, which requires caution, as the wrong actions can cause malfunctions in the phone. Before you start, make sure that the battery is at least 30% charged.

Instructions:

1. Open the Phone app.
2. Enter the combination: ##4636## (test menu opens).
3. Select the Battery Information item.
4. Find the AC Charging or USB Charging string and tap it.
5. In the window that appears, select Disable fast charging (if you don’t have one, try Set charging current and set 500 mA).

If the phone stops charging at all after this, restart it. In most cases, charging will return to normal (5V/1A).

Method 3: Applications for charging control (without root)

If you don't want to dig into the settings, you can use third-party utilities. For example, the AccuBattery app (available on Google Play) allows you to limit the charging current to safe values. However, it can not fully disable Quick Charge 3.0 - only slow down the speed.

Algorithm of action:

1. Install AccuBattery and provide all the necessary permissions.
2. Go to the Charging section.
3. Activate the option to limit the charging current.
4. Set the maximum value in the range of 500-1000 mA.

The downside of this is that the app only works when the screen is on, and once you lock the phone, the restrictions will be reset, and you'll need root access to keep up with the controls.

Through standard settings

Engineering menu

Third-party annexes

ADB-team

I don't know, I haven't tried it yet.-->

⚠️ Note: Some charging management applications (e.g. Battery Charge Limit) require root rights. 8T This can lead to loss of warranty and unstable system operation.Before using, check reviews and rankings in Google Play.

Method 4: Use of a non-original charger

The most radical but effective method is to use a charger without Quick Charge support, which is suitable for any standard RAM with a output of 5V/1A or 5V/2A. For example, charging from older models of Samsung, Nokia or even iPhone (without Power Delivery support).

Advantages of the method:

• 🔋 Less battery wear – slow charging reduces heat generation.
• 🔥 No overheating - the body temperature remains within 30-35°C.
• 💰 Low cost – standard RMS cheaper than original.

Disadvantages:

• ⏳ Long charging time – a full cycle can take 3-4 hours.
• ⚡ Low compatibility – some RAMs may not be recognized by the phone.

If you choose this method, we recommend using USB-IF-certified chargers (such as Anker PowerPort or Belkin BoostUp) that guarantee stable voltage and short-circuit protection.

💡

Before buying a new charger, check its compatibility with the Redmi Note 8T on the manufacturer’s website. Some budget models may give out unstable voltage, which will lead to even more wear and tear of the battery.

Method 5: Disconnect via ADB (for advanced users)

If none of the previous methods worked, you can try disabling fast charging via Android Debug Bridge (ADB), which requires connecting your phone to your computer and basic command line knowledge.

Step-by-step:

1. Download and install ADB Tools on your PC (e.g. Minimal ADB and Fastboot).
2. Turn on USB Debugging on your phone: Settings → About Phone → MIUI version (tap 7 times to activate Developer Mode), then go back to Settings → Additional → Developer and enable debugging.
3. Connect the Redmi Note 8T to your computer via USB.
4. Open the command line (Windows) or terminal (macOS/Linux) and type:

adb devices

(Make sure the device is determined.)

adb shell


su




echo 0 > /sys/class/power_supply/battery/input_suspend

If the command runs without errors, the fast charging will be disabled until the next reboot, and to make the changes permanent, root access and editing of system files will be required.

💡

Using ADB can result in a reset or loss of warranty.If you are not sure about your actions, it is better to turn to other methods.

What do you do if nothing helps?

If none of these methods worked, it's probably the firmware or hardware of the phone that's the problem, and we recommend that you:

1. Update MIUI to the latest stable version via Settings → System Update.
2. Reset the settings to factory (don’t forget to make a backup!).
3. Contact the service center if the phone is guaranteed.
4. Install custom firmware (e.g. Pixel Experience or Havoc OS) that has flexible charging settings.

If you suspect that the problem is in the power controller (the phone does not charge at all or charges too slowly even with the original RAM), it may be a hardware malfunction.

FAQ: Frequently Asked Questions