How to enable fast charging on Xiaomi Mi 8 Pro: all the ways and nuances

Xiaomi Mi 8 Pro is the flagship of 2018, which is still relevant thanks to the powerful hardware and support for fast charging. However, many users are faced with the fact that the smartphone charges slower than expected, although the specifications indicate the Quick Charge 4+ protocol. What is the point? The fact is that fast charging on the Mi 8 Pro is not always activated automatically – it needs to be properly configured and sometimes “unlocked” in hidden menus.

In this article, we’ll look at all the working ways to enable fast charging, from basic MIUI settings to editing configuration files. You’ll learn which chargers actually support a maximum charging speed (up to 27 watts), how to check your current charging mode, and what to do if your smartphone “refuses” to use Quick Charge. We’ll also analyze common myths – for example, whether cables affect speed and why charging sometimes “slows” after a firmware update.

Important: The instructions in this article are valid for all versions of MIUI (including MIUI 14 and HyperOS), but some points may differ depending on the regional firmware. If your Mi 8 Pro runs on custom firmware (for example, LineageOS or Pixel Experience), some methods may not work.

1. Compatibility Check: Does your Xiaomi Mi 8 Pro support fast charging?

Before you try to enable fast charging, make sure your device really supports it. Xiaomi Mi 8 Pro is equipped with a Qualcomm Quick Charge 4+ controller, but there are a few nuances:

• 🔋 Maximum power: 27 Watt (9V/3A or 10V/2.7A), But only with the original charger Xiaomi or certified analogues.
• ⚡ Support USB Power Delivery (PD): Partial (up to 18 watts), but requires special cable USB-C to USB-C.
• ⚠️ Temperature limit: if the battery is heated above 40°C, MIUI automatically reduces power to 10-15 W.
• 🔄 Cable Compatibility: Only Cables with Support USB 3.1 Gen1 or higher (marking) 5A plug-in).

To check if your smartphone supports fast hardware charging, follow the following steps:

1. Connect your smartphone to the charger.
2. Go to Settings → About Phone → MIUI version and tap 7 times on the “Kerole” line (the developer menu is unlocked).
3. Return to Settings → Additional → For developers and find the item Charging Status.
4. If you have Quick Charge 4+ or PD in your status, your device supports fast charging.

If only Standard (5V/2A) is displayed in the status, the problem may be:

• 🔌 Non-original charger (power below 18 W).
• 🔗 Damaged cable (check for overbending or melting).
• 📱 Programmatic limitations in MIUI (below).

Basic MIUI settings: where does fast charging turn on?

In most cases, fast charging on the Mi 8 Pro is activated automatically when a compatible charger is connected, but in some firmware (especially global or European ones), this feature can be disabled by default.

1. Open Settings → Battery and Performance.
2. Put the badge on. ⚡ in the upper right corner (or select Charging Settings).
3. Activate the Quick Charge (or Quick Charge) switch.
4. If there is an optimised charge option, turn it off (it limits power to save the battery).

In some versions of MIUI, the path may be different:

• 📌 MIUI 12/13: Settings → Battery → Settings → Fast charging.
• 📌 HyperOS: Settings → Battery and charging → Charging modes.

Check out the MIUI version in About Phone

Activate the developer mode (7 taps according to the "MIUI version")

Turn off "Optimized Charging" in the battery settings

Use the original cable and power supply-->

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

• ❌ You have firmware installed without Quick Charge support (for example, some custom builds).
• ❌ Charger is incompatible (see table below).
• ❌ The system activated hidden mode of energy saving (solved by resetting the battery settings).

3. Charger compatibility table for Xiaomi Mi 8 Pro

Not all chargers are equally efficient. Below is a table of proven models that deliver the highest charging speed on the Mi 8 Pro:

Important: Even if the charger supports Quick Charge 4+, the smartphone may be limiting power due to the unoriginal cable. Use only certified 5A or USB-IF cables.

How to check the current charging power?

1. Install the Ampere or AccuBattery app from Google Play.
2. Connect the charger and start the application.
3. If the charging current exceeds 2000 mA, fast charging works.

💡

If you don’t have the original charger, choose a model that supports Quick Charge 4+ and Power Delivery. For example, Baseus 65W GaN or Ugreen 100W – they are versatile and work with most Xiaomi smartphones.

4. Hidden settings: how to unlock fast charging through the engineering menu

If standard methods don’t work, you can try activating fast charging via the engineering menu (#4636##), which works on most MIUI firmware, but requires caution.

Instructions:

1. Open the Phone app and enter the combination: ##4636##.
2. Go to the section Information about the battery.
3. Check the line. AC Powered - if it's listed USB instead QC_4, So fast charging is not activated.
4. Go back to the main menu of engineering settings and select Battery Information → Charging Control.
5. Enable the Fast Charge option (if any).

If there is no Fast Charge, try the alternative method using ADB:

adb shell settings put global fast_charge_forced_enable 1

This command is forced to enable fast charging, but may not work on all firmware. Once you enter the command, restart the smartphone.

⚠️ Note: Change settings through the engineering menu or ADB If after manipulations, the battery began to discharge faster or the smartphone overheated, reset the settings to the factory.

💡

If the engineering menu is not available, check if the developer mode is activated (Settings → About Phone → MIUI version, tap 7 times).

5 Why fast charging doesn't work: Common problems and solutions

Even if you set it up correctly, fast charging may not work, and here are the most common reasons and ways to fix them:

• 🔥 Battery overheating: MIUI automatically reduces power if the temperature exceeds 40°C. Solution: Let the smartphone cool down or remove the case.
• 🔄 Firmware update: After update MIUI Sometimes reset the charging settings.Solution: switch the charging mode manually (see section 2).
• 📵 Damaged. USB-port: If the contacts are oxidized or bent, the smartphone will not recognize the charger. Solution: clean the port with alcohol or contact the service.
• 🛡️ Power Saving Mode Activated: Ultra Battery Saver Mode turns off fast charging. Solution: Turn off mode in notification curtain.
• 🔧 Incompatible firmware: Some custom firmware (e.g. Pixel Experience) don’t support Quick Charge 4+. Solution: Go back to the official MIUI.

If the problem persists, check the charging logs through the Device Care app (included in the standard MIUI set):

1. Open the settings → About the phone → Diagnostics.
2. Select System Logs → Charging.
3. Charging paused: temperature too high or unsupported charger.

⚠️ Note: If the Battery health degraded error appears in the logs, it means that the battery capacity has dropped below 80%, and MIUI It limits the maximum charging current, and then you can just replace the battery.

6. Alternative methods of accelerating charging

If standard fast charging is unstable, alternative methods can be tried:

• 🔌 Use of Power Delivery (PD): Connect your smartphone to a charger with support PD cable USB-C to USB-C. For example, charging from a MacBook or iPad Pro can give up to 18 watts.
• ☀️ Charging with the screen off: MIUI It reduces power if the screen is on. Turn off the display, and the charging speed will increase by 10 to 15%.
• ❄️ Cooling your smartphone: Put the Mi 8 Pro on a metal surface or use a cooling stand.This will prevent trottling (automatic power reduction).
• 🔄 Resetting battery settings: How to do this, read the spoiler above.

You can also try to force Quick Charge to be enabled through the build.prop file editing (power users only!):

1. Install Root Explorer or any file manager with root rights.
2. Open the file /system/build.prop.
3. Add the line: ro.miui.fastcharge=true.
4. Save the changes and restart the smartphone.

This method doesn't work on all firmware, and it can cause the system to run in an unstable way. Use it at your own risk!

7. Myths about fast charging: what is true and what is not?

There are many myths around fast charging, and we'll take a look at the most popular ones.

• ❌ Myth 1: "Fast charging ruins the battery." Partly true. Quick Charge 4+ It really increases battery wear by 10-15% per year, but modern batteries are designed for 500-800 cycles even with intensive charging.
• ❌ Myth 2: “You can use any charger with a USB-C». No, you need to match protocols to get the best speed (QC 4+ or PD) and sufficient power supply.
• ❌ Myth 3: “Wireless charging is just as fast.” Wrong. Mi 8 Pro supports wireless charging up to 10W — that’s 2-3 times slower than Quick Charge.
• ❌ Myth 4: "If you turn off optimized charging, the battery will last longer." Wrong. Optimized charging (limited to 80%) just prolongs the life of the battery.

Many users also believe that cable does not affect charging speed, which is not true: cheap cables without USB 3.1 support can limit current to 2A, even if the power supply produces 3A. Always use cables labeled 5A or SuperCharge.

FAQ: Frequent questions about fast charging on Xiaomi Mi 8 Pro