How to remove fast charging on Xiaomi Redmi Note 7: 5 proven ways

Xiaomi Redmi Note 7 is one of the brand’s most popular smartphones, but its Quick Charge 4.0 fast charging feature isn’t always helpful. Many users find that the battery wears out faster due to high currents, and the process itself heats up the device. If you want to extend battery life or just prefer slow charging, this guide will help turn off fast charging completely or partially.

In this article, we'll look at all the methods available, from standard MIUI settings to hidden engineering menu commands and third-party utilities. It's important to understand that some methods require root rights or may affect warranty, we'll warn you of the risks in each section, and you'll learn how to check if fast charging is actually turned off, and what to do if the smartphone stops charging after the changes.

Why you should turn off fast charging on the Redmi Note 7

Quick Charge technology is convenient when you need to urgently recharge, but it has serious disadvantages:

• 🔋 Rapid battery ageing: Lithium-ion batteries degrade at high currents and temperatures; rapid charging increases wear and tear 15-20% faster than standard batteries.
• 🔥 Overheating device.Redmi Note 7 warms up when charging to 40-45°C, which is harmful to the processor and other components.
• ⚡ Power failure: Cheap chargers may not be able to handle high currents, causing voltage surges.
• 📉 Decrease in capacity over time: With constant fast charging after 1-2 years, the battery can lose up to 30% of its original capacity.

Smartphone manufacturers rarely advertise these problems, but independent tests (for example, from Battery University) confirm that slow charging (0.5-1A) extends the battery life by 1.5-2 times.

Method 1: Disconnect via standard MIUI settings

The easiest and safest method is to use the built-in MIUI options. Unfortunately, there is no direct button on the Redmi Note 7 to turn off fast charging, but you can limit power indirectly:

1. Open Settings → Battery and Performance.
2. Select Battery Settings → Charging Mode (in some versions of MIUI, this item may be called Charging Optimization).
3. Activate the option to Limit charge to 80% or Slow charge (if available).
4. Reset the device.

This method doesn't shut down Quick Charge completely, but it reduces the charging current. You'll notice that the phone will warm less and charge time will increase by 30 to 50 percent. If your version of MIUI doesn't have these options, move on to the next one.

Check the current version of MIUI (Settings → About Phone)

Connect the original charger

Charge your phone up to 50% for testing

Make a backup copy of important data-->

Method 2: Engineering menu (#4636##)

Hidden engineering menu allows you to fine-tune the charging settings, but requires caution. Wrong actions can cause battery damage or system failure. Here's how to safely change settings:

1. Open the Phone app and enter the combination: ##4636##.
2. In the menu that appears, select Battery Information.
3. Scroll down to AC Charge, which shows current AC and AC voltage.
4. Click on AC Charge and enter the current value of 1000 mA (1A) instead of the standard 1800-2000 mA.
5. Save the changes and restart the phone.

After that, charging will be slower and the heat will decrease, so if the menu does not open, then the manufacturer has blocked access, in which case the MTK Engineering Mode application (available on Google Play for Snapdragon devices) will help.

⚠️ Warning: Changing the settings in the engineering menu can lead to unstable charging. If after the changes the phone stopped charging, reset the menu settings to factory or run Wipe Battery Stats in the computer. TWRP.

Method 3: Use of the AccuBattery application

AccuBattery not only monitors battery status, but also allows you to limit the charging current without root rights. This is one of the most secure methods, since the changes are reversible and do not affect system files.

Instructions:

1. Install AccuBattery from Google Play.
2. Open the application and go to the Charging tab.
3. Activate the option to Limit the charging current and set a value of 1000 mA (or less if necessary).
4. Connect the charger - the application will automatically reduce the current.

AccuBattery works at the software level, so it doesn't require superuser rights. However, there's a limitation to the method: the application must run in the background. If the system closes it to save energy, the restriction will reset. To avoid this, add AccuBattery to the battery optimization exceptions (Settings → Applications → Permissions → Autostart).

Method 4: Edit build.prop (power users only)

This method requires root rights and is designed for advanced users, and allows you to completely disable Quick Charge support at the system level, but if you do the wrong thing, it can lead to a device blink.

Step-by-step:

1. Install a file manager with root support (such as Root Explorer or Solid Explorer).
2. Go to /system/build.prop and back up the file.
3. Open build.prop in the text editor and add at the end of the line: persist.sys.qc.enable=0 persist.sys.usb.config=mtp,adb
4. Save the file, set the rights 644 (rw-r--r---).
5. Reboot the phone.

Once rebooted, fast charging will be disabled at the system level. To get it back, delete the added lines or restore the build.prop backup.

⚠️ Warning: Incorrect editing of build.prop can lead to a load cycle or loss of functionality of modules (camera, network, etc.) Before making changes, check that your firmware is compatible with these options on the forums. 4PDA or XDA Developers.

💡

If the phone doesn't turn on after you edit build.prop, download to TWRP and restore the original file from the backup. To do this, copy the backup to /system/ via ADB Sideload.

Method 5: Use of a non-original charger

If the software methods don't work, you can fool the system with hardware. Redmi Note 7 supports Quick Charge 4.0, but if you connect the charger without this technology, the phone will automatically go to standard charging.

Here are the charges that will do:

• 🔌 Standard. USB-charger (5V/1A). For example, from the old Nokia or Samsung with the release 5V.
• 📱 Power bank chargers. Most external batteries are issued. 5V/2A, What's safe for the battery.
• 💻 Connection to USB-The port of the computer. USB 2.0 gives 500 m, USB 3.0 - up to 900 mA.

The downside is that it can charge very slowly (4-6 hours to 100%), but it is completely safe and does not require any changes to the system, and if you need to temporarily turn off fast charging (for example, overnight), this is the best option.

💡

The most reliable way to avoid risk to the system is to use a charger without Quick Charge support, which is guaranteed to reduce the current and temperature of the battery without interference with the software.

How to check that fast charging is turned off

After applying any of the methods, it is important to make sure that the changes work. Here are 3 ways to test:

1. Ampere app. Shows the current charging current. If the value is less than 1000-1200 mA, fast charging is disabled.
2. Charging time: With fast charging, the Redmi Note 7 gains 50% in 30-40 minutes, and after switching off, this time will increase to 1.5-2 hours.
3. Body temperature. Use the CPU Monitor app or just touch your phone near the camera, and if it doesn't heat above 35°C, it's done right.

If the current is still high (1800 mA or higher), then the method did not work. Try another method or check the compatibility of your firmware. Custom firmware (for example, LineageOS) may require additional adjustments.

What to do if your phone stops charging after changes

In rare cases, incorrect settings can lead to charging problems.

1. Reset the battery settings. In the engineering menu (#4636##) select Battery Information → Battery Reset.
2. Clear the cache. Load to Recovery. + Loud up and select the Wipe Cache Partition.
3. Return the standard build.prop settings. If you edited the file manually, restore it from the backup.
4. Sweat stockware. In extreme cases, return the original firmware through the Mi Flash Tool.

If your phone doesn’t respond to charging, check:

• 🔌 Cable and power supply (try another charger).
• 🔋 Port port USB (Clean the dust, check for physical damage).
• 🔄 Battery (if the phone is collapsible, check the contacts of the battery).

⚠️ Warning: If after manipulating build.prop or engineering menus, the phone only charges when the screen is off, this is a sign of a power management failure.Restore firmware via Fastboot or contact the service center.

FAQ: Frequent questions about fast charging on the Redmi Note 7