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

The Xiaomi Redmi Note 7 has become one of the most popular smartphones of 2019 thanks to a combination of performance and affordable price. However, its Quick Charge 3.0 feature does not always live up to expectations: many users complain about overheating of the battery, accelerated battery wear or incompatibility with cheap chargers. If you notice that the smartphone heats up while charging or the battery starts to go down faster, turning off accelerated charging may be the solution.

In this article, we’ll look at all the ways you can deactivate fast charging on the Redmi Note 7, from standard MIUI settings to hidden engineering menus and third-party utilities. You’ll also learn which charging protocols this model supports (Quick Charge 3.0, USB-PD, standard USB 2.0) and how to switch them correctly without risking the device.

Why do you need to turn off fast charging on the Redmi Note 7?

Smartphone manufacturers often tout fast charging as an undeniable advantage, but in practice, this technology has serious drawbacks:

• 🔥 Battery overheating: with accelerated charging, the battery temperature can exceed 40–45°C, which reduces its resource by 15-20% per year.
• ⚡ Uneven wear of cells: Lithium-ion batteries degrade faster at high currents, especially if you charge your smartphone from 0% to 100%.
• 💥 Risk of damage to the power controller: cheap chargers without Quick Charge 3.0 support can supply unstable voltage, which leads to malfunctions in the smartphone.
• 📉 Reduced battery capacity: according to research, batteries with fast charging lose up to 30% of capacity in 2 years against 15% with standard charging.

On the Redmi Note 7, the problem is compounded by the fact that the model is equipped with a battery capacity of 4000 mAh, which with intensive use of fast charging can begin to “swell” in 18-24 months. If you plan to use the smartphone for more than two years, the transition to standard charging (5V/2A) will help to extend the battery life by 30-50%.

⚠️ Warning: If you notice that the smartphone is very hot during charging (the body is hot to the touch) or the battery discharges faster than 6-8 hours with moderate use - these are signs of battery degradation.

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 setting in the Redmi Note 7 to disable Quick Charge, but you can limit the charging power through Battery Savings mode:

1. Open the settings → Battery and performance.
2. Go to the section Saving battery power.
3. Activate the option Super charge saving or charge saving (depending on the MIUI version).
4. Connect your smartphone to the charger – charging power will automatically be limited to 5V/1A (standard USB).

This method has a limitation: the economical mode turns off the background activity of applications, which can prevent notifications from being received, but it is guaranteed to reduce battery heating and prolong its life.

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

If standard settings do not fit, you can use the Engineering Mode, which has hidden power controller settings, which requires caution, as improper actions can lead to a firmware failure or loss of warranty.

Instructions:

1. Open the phone app and enter the combination: ##4636##
2. In the menu that opens, select Battery Information.
3. Scroll down and find the Fast Charge Config section (can be called Quick Charge or Charge Control).
4. Turn off the Enable Fast Charge (or set the Disabled value).
5. Save the changes and restart the smartphone.

After these steps, the Redmi Note 7 will charge in standard mode (5V/2A). If the Fast Charge Config item is missing, then your firmware version does not support this option - try other methods.

⚠️ Note: Entrance to the engineering menu may be blocked on some firmware MIUI (If nothing happens after you enter the code, the manufacturer has restricted access. In this case, use Method 3 or Method 4.

Method 3: Applications for charging control (without root)

If you don't want to dig into the settings, you can use third-party utilities that limit the charging current programmatically.

The most versatile option is AccuBattery.

1. Open the application and go to the Charging section.
2. Set a charge limit of up to 80% (the recommended threshold for extending battery life).
3. Activate the option to limit charging current and select 1000 mA (standard USB).

The app will automatically reduce charging power when connected to the network, simulating the standard mode, and the downside of this method is that the application must run in the background, which can slightly increase battery consumption.

💡

If your smartphone still charges quickly after installing AccuBattery, check your battery optimization settings in MIUI: go to Settings → Applications → Application Management → AccuBattery → Battery Savings and disable all restrictions.

Method 4: Disconnect via ADB (for power users)

If the engineering menu is not available, and the applications do not help, you can use the ADB-Android Debug Bridge, which doesn't require root rights, but it does involve a computer.

Step-by-step:

1. Download and install Platform Tools (includes adb.exe).
2. On your smartphone, activate Developer Mode: go to Settings → About Phone and 7 times click on the MIUI version.
3. Return to Settings → Additional → For developers and enable USB debugging.
4. Connect your smartphone to your PC and type in the command line: adb shell settings put global fast_charge_enabled 0
5. Reset the device.

Once these commands are executed, the fast charging will be turned off at the system level. To get it back, use the command:

adb shell settings put global fast_charge_enabled 1

⚠️ Attention: Some firmware MIUI can reset fast_charge_enabled If the update activates fast charging again, repeat the procedure.

💡

ADB-commands are the most reliable way to turn off fast charging without root, but it requires a basic command line knowledge. ADB, Choose Method 1 or 3.

Method 5: Hardware shutdown (for extreme cases)

If the software methods don't work, there's a physical limitation of the charging power, which is a radical way that only works if:

• 🔌 You are using a non-original charger that does not support Quick Charge 3.0.
• 📱 The smartphone overheats even when the fast charging is turned off through the settings.
• 💀 The battery has already deteriorated significantly (capacity below 70% of the nominal value).

Options for hardware limitation:

1. Use a 5V/1A charger (e.g. from an old Nokia or Samsung smartphone of the early 2010s).
2. Connect the smartphone to USB-Computer port (power limited to 500 mA).
3. Use it. USB-hub without fast charging support.
4. Install the resistor in the cable (for experienced users, requires a soldering iron).

The easiest and safest option is to buy a fixed current charger 1A. For example, a power supply from Xiaomi Mi Power Bank 1 (output 5V/1A) will suit. This is guaranteed to turn off Quick Charge, since the smartphone controller will not receive a signal to support accelerated charging.

What happens if you turn off fast charging: pros and cons

Before making a decision, weigh the pros and cons:

If you use your smartphone intensively (for example, for games or video shooting), turning off fast charging may not be justified - it is better to limit charging to 80% through AccuBattery. If the Redmi Note 7 serves you for calls, messengers and easy surfing, switching to standard charging will definitely prolong the life of the device.

FAQ: Frequent questions about turning off fast charging on Redmi Note 7