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

Xiaomi Mi 8

Quick Charge 4 is a fast charging system+

In this article, we will discuss all ways to enable fast charging on the Mi 8, from standard settings. MIUI You will also learn how to check if Quick Charge is working on your device and which chargers really support accelerated charging up to 18W.

Immediately note: if you use the “native” complete power supply from Xiaomi Mi 8, He only supports it. 10 Watt (5V/2A). For full fast charging you need an adapter with support for Quick Charge 3.0/4+ or Power Delivery (PD). We will talk about this in more detail below.

Before you get to the settings, make sure your Mi 8 doesn’t overheat while charging – this is one of the reasons for automatically turning off the accelerated mode. Also check the battery status: if its capacity has dropped below 80%, the system can limit current.

1. Check support for fast charging on Xiaomi Mi 8

Not all versions of the Mi 8 work equally well with the Quick Charge, such as the Chinese version (Mi 8). SE Mi 8 UD) To make sure your device supports the technology, follow the following steps:

First, check the smartphone model:

1. Open the Settings. → The phone.
2. Find the line Model - it should be indicated M1803E1A (global version) or M1803E1T (Chinese).
3. If the model is different (for example, Mi 8). SE indexed M1805E10A), Maximum charging power is limited to 10 watts.

Make sure that the firmware supports Quick Charge 4+. For that:

• 📱 Go to Settings. → The phone. → Version. MIUI.
• 🔍 Check the build number: if the version MIUI 10 and above, fast charging support should work out of the box».
• ⚡ If you have custom firmware (like LineageOS or Pixel Experience), the feature may be disabled – you will need to manually configure the kernel.

Important: Xiaomi Mi 8 Supports Quick Charge 4+ only when using a compatible charger (5V/2A) does not provide accelerated charging!

2. Which chargers are suitable for fast charging

Even if you turn on Quick Charge in the settings, without the right charger, there will be no effect.The Xiaomi Mi 8 is compatible with the following standards:

If you’re using a charger from another smartphone (like Samsung or OnePlus), check its specs. S9 (15W or OnePlus 6T (20W) will do but may not produce a full 18W due to differences in protocols.

Also, pay attention to the cable:

• 🔌 Use the original cable USB Type-C from Xiaomi or a certified analogue (e.g. Anker PowerLine).
• ⚡ Cheap cables often do not support high currents and can limit power to 10 watts.
• 🔄 If the cable is damaged (peretert, bent connector), the smartphone will automatically reduce the charging speed.

💡

To check the actual power of the charger, install the AccuBattery app (available on Google Play) that will show the current current and voltage in real time.

3. How to enable fast charging in MIUI settings

In most cases, Quick Charge on Xiaomi Mi 8 is activated automatically when a compatible charger is connected, but sometimes the function is disabled software to enable it:

Method 1: Through standard settings

1. Open Settings → Battery and Performance.
2. Select Battery Settings → Additional (or Charging Mode in some versions) MIUI).
3. Activate the Fast Charging switch (could be called Quick Charge or Accelerated Charging).

Method 2: Through the engineering menu (if the option is not available in the standard settings)

1. Open the Phone app and enter the combination: ##4636##.
2. In the menu that opens, select Battery Information.
3. Check the charge technology line if it says Quick Charge 3.0 or 4+, function.
4. If Standard is displayed, try manually enabling mode via the command (root rights required): su echo 1 > /sys/kernel/quickchg/force_fast_charge

⚠️ Warning: Enable Quick Charge through the Engineering Menu or ADB This method can cause the battery to overheat if the charger is not certified. Use this method only when you are sure of the equipment compatibility.

Check out the smartphone model (must be Mi). 8, not SE/UD)

Use a charger with Quick Charge 3.0/4+ or PD

Make sure the cable supports high currents (preferably original)

Turn off the case (overheating can block accelerated charging)

Check the battery temperature (optimum 20-35)°C)-->

4.Why fast charging doesn't work: common problems

If you’ve done all the settings, but the Xiaomi Mi 8 is still charging slowly, the reasons may be as follows:

Problems with the charger or cable:

• 🔌 The charger does not support Quick Charge (check the marking on the block).
• 🔗 The cable is damaged or not certified (use the original one). USB-C).
• 🔋 The power supply unit gives insufficient power (for example, 10 W instead of 18 W).

Programmatic limitations:

• 📱 Installed custom firmware without support for Quick Charge.
• 🔄 In the settings MIUI Power saving mode is activated (disables fast charging).
• 🛠️ Update MIUI Reset settings (check the Battery section).

Hardware causes:

• 🔥 Battery overheating (smartphone automatically reduces current).
• 🔋 Battery wear (capacity below 80% of nominal value).
• 🛠️ Power controller damaged (diagnosis required at service center).

⚠️ Warning: If the charger is connected to Quick Charge, the smartphone is very hot (above 40)°C) or turns off, immediately turn it off! This may indicate a malfunction of the battery or power controller!

To diagnose the problem, follow the following steps:

1. Connect your smartphone to the charger and wait for the lightning icon to appear on the lock screen (⚡). If not, fast charging is not activated.
2. Install the app AIDA64 and check the Battery section. → Charging technology.
3. Try another charger (e.g. from Xiaomi Mi 9 or Redmi) K20 Pro).

5. Alternative methods of accelerating charging

If standard fast charging doesn’t work or you want to cut down on time even further, consider these methods:

Use of Power Delivery (PD):

• 🔌 Connect the Mi 8 to the charger with PD (for example, Apple 18W Google Pixel Stand).
• 📱 In the settings, select the mode USB-PD (if available).
• ⚡ Power can reach 18 watts, but high-quality cable is required. USB-C → USB-C.

Activation through ADB (power-user):

1. Connect your smartphone to your PC and enable debugging USB (Settings → The phone. → Version. MIUI — Press 7 times, then Settings → Additionally. → For developers → Debugging by USB).
2. Open the command line and type in: adb shell su echo 1 > /sys/kernel/quickchg/force_fast_charge
3. Reset the device.

Background optimization:

• 📴 Turn off mobile data and Wi-Fi while charging.
• 🔇 Activate Plane Mode – This will reduce charging time by 10-15%.
• 🧹 Close all background apps (especially games and social media).

⚠️ Note: Enable Quick Charge through ADB Or an engineering menu can cause accelerated wear on the battery if the charger is not certified!

💡

The most reliable way to speed up charging is to use the original Xiaomi charger. 18W QC3.0 cable USB-C Alternative methods (PD, ADB) They may increase, but they need caution.

6.How to check that fast charging is working

To make sure that Quick Charge is activated, use these methods:

Method 1: Badge on the lock screen

• 🔋 Connect your smartphone to the charger.
• 👀 Look at the lock screen – if lightning is displayed (⚡) Or the words "Fast charging", the function works.

Method 2: Monitoring applications

• 📊 Install AccuBattery or AIDA64.
• 🔍 Open the Charging section – if the current exceeds 1500 mA, then the Quick Charge is active.
• 📈 V AIDA64 Check the charge technology line – Quick Charge should be specified 3.0/4+.

Method 3: Manual testing

1. Discharge your smartphone to 10-15%.
2. Connect to the charger and record the time.
3. If the battery is charged by 30-40% in 30 minutes, fast charging works correctly.

Normal performance for Xiaomi Mi 8 with Quick Charge 4+:

• 🔋 From 0% to 50% – about 30-40 minutes.
• 🔋 50% to 100% – around 40 to 50 minutes (speed is reduced to protect the battery).

If the indicators are worse, check:

• 🔌 Compatibility of charger.
• 📱 Settings MIUI (Perhaps the energy saving mode has been activated).
• 🔥 The temperature of the smartphone (when overheating, the speed drops).

7. Tips for extending battery life

Using fast charging is convenient, but can shorten battery life if you don’t follow the simple rules:

Charging recommendations:

• 🔋 Try not to discharge the smartphone below 20% and do not charge above 80% (optimal range for lithium-ion batteries).
• ⚡ Avoid charging at extreme temperatures (below 0)°C or higher than 35°C).
• 🔌 Use only certified chargers and cables.

Battery maintenance:

• 🔄 Every 3 months, complete a full discharge/charging cycle (0–100%) to calibrate the controller.
• 🛠️ If the battery capacity has dropped below 70%, consider replacing it (the original battery for the Mi 8 has a code). BM47).
• 📱 Turn off background processes that load the battery while charging (games, navigation, video).

Signs of battery wear:

• ⚡ The smartphone charges slower than before (for example, up to 50% in 1)+ hour).
• 🔋 Autonomous work time has decreased by 30% or more.
• 🔥 The body is very hot even with normal charging.

⚠️ Warning: If the fast charging stops working after the battery is replaced, make sure the original module is installed.Poor analogs may not support Quick Charge or cause overheating.

FAQ: Frequently Asked Questions