How to enable fast charging on Xiaomi Mi 9 Pro: all the ways and nuances

Xiaomi Mi 9 Pro is the flagship smartphone of 2019, equipped with support for ultrafast charging Quick Charge 4+ and proprietary technology Mi TurboCharge (30 watts). However, many users are faced with the fact that the device charges slower than expected, although the original power supply and cable included. What is the reason? Most often the problem lies in the wrong settings or software restrictions.

In this article, we’ll break down all the ways to activate fast charging on the Mi 9 Pro, including hidden MIUI settings, accessory compatibility checks, and solving common bugs. You’ll learn how to get your smartphone to charge at top speeds – from 0 to 100% in less than an hour.

Checking support for fast charging on Xiaomi Mi 9 Pro

Before you set up charging, make sure your device and accessories support it. The Mi 9 Pro is officially compatible with:

• 🔌 Mi TurboCharge 30W (original power supply unit complete)
• ⚡ Quick Charge 4/4+ (standard)
• 🔋 USB Power Delivery (PD) (18W)

To check the current charging speed:

1. Connect your smartphone to the charger.
2. Unlock the screen and open the Settings → Battery.
3. Click on the energy consumption chart icon (in the upper right corner).
4. In the section Charging state, look at the current power (in watts).

If the power is below 18 watts, then fast charging is not activated, and the reasons can be different, from the unoriginal cable to the disabled function in the firmware.

Why fast charging doesn’t work: the main reasons

Even with the original accessories, the Mi 9 Pro can charge in standard mode.

A critical feature of the Mi 9 Pro: the smartphone automatically reduces the charging power at a battery temperature above 40 ° C or below 5 ° C. This is protection against battery damage, and it is impossible to bypass it.

Method 1: Enabling fast charging via MIUI settings

In most cases, it is enough to activate the function in the battery menu.

1. Open the Settings. → Battery.
2. Slip on three dots in the upper right corner and select Additional.
3. Find the Fast Charging (or Mi TurboCharge) and switch the slider to the On position.
4. Confirm the action if a heat warning appears.

Use the original USB-C→USB-C| cable

Connect the original 30W| power supply

Turn off the power saving mode |

Close resource-intensive applications (games, navigators)-->

If the Fast Charging item is not on the menu, it means:

• 📱 Your version. MIUI Does not support manual control (relevant for old firmware).
• 🔧 The function is blocked by the manufacturer (for example, on some regional versions).
• 🔄 You need to update the system (see the next section).

Method 2: Update firmware to unlock fast charging

In the early versions of MIUI (below MIUI 12), the Mi TurboCharge function could be disabled by default to unlock it:

1. Check the current firmware version in Settings → About Phone → MIUI version.
2. If the version is older than 2020, update the system: Settings → About phone → System Update → Check the updates
3. Download and install the latest stable firmware (MIUI 13/14 is recommended for the Mi 9 Pro).

After the update:

• 🔄 Reboot your smartphone.
• 🔌 Connect the original charger.
• 📊 Check the charging power in Settings → Battery.

💡

If the update via OTA (over the air) is not available, download the firmware manually from the official Xiaomi website and install through System Update → Three dots → Select a firmware file.

Attention! When you are manually firmware, only use files for the Mi 9 Pro (codenamed crux) and installing firmware from another model will cause the device to break down.

Method 3: Reset battery settings (if charging is not turned on)

If after all the manipulations, the fast charging never worked, try resetting the battery settings.

• 🔋 Smartphone "forgot" the original power supply.
• ⚡ Previous Energy Saving Settings Conflict With Charging.
• 📉 The charging power suddenly dropped for no apparent reason.

Instructions:

1. Go to Settings → Applications → Application Management.
2. Slip on three dots in the upper right corner and select Show System.
3. Find the Battery and Performance app (or Battery in Russian).
4. Open it and press the Warehouse → Clear the data.
5. Reboot your smartphone.

⚠️ Warning: After the battery is discharged, the smartphone can calibrate the battery’s capacity for the first 2-3 charging cycles, at which time the charging speed can be unstable.

Checking the cable and power supply: how not to make a mistake with accessories

Even the original power supply can fail over time, and here's how to test it for performance:

If you use Power Bank, make sure it supports USB Power Delivery (PD) or Quick Charge 3.0/4.0. Most cheap power banks will give no more than 10-15 watts, which is not enough for fast charging the Mi 9 Pro.

Additional Tips for Maximum Charging Speed

To charge the Mi 9 Pro at the maximum power (up to 30 W), follow these recommendations:

• 📵 Do not use your smartphone while charging: Games, video or navigation increase the load on the processor, which leads to overheating and reduced power.
• ❄️ Charge at room temperature. Optimal range: 10-35°C. In the cold or heat, charging will automatically slow down.
• 🔌 Connect to the socket, not to the socket. USB-Port of PC. USB 2.0/3.0 high-end 7.5–15 Watt.
• 🛌 Use airplane mode. Shutting down the network and background processes speeds up charging by 10-15%.

If you notice that the battery is charging more slowly than before (for example, from 30 watts to 15 watts), this may indicate:

• 🔋 Battery wear (after 500-800 charge cycles).
• 🔌 Damage to the power controller (requires repair).
• 📉 Software failure (will help reset settings or flashing the firmware).

💡

The original Mi TurboCharge 30W (MDY-11-ED) is the only way to get the maximum charging speed. Even certified QC 4+ units from other manufacturers (such as Anker or Belkin) will be limited to 18-22 watts.

FAQ: Frequent questions about fast charging Xiaomi Mi 9 Pro