How to enable fast charging on Xiaomi Redmi Note 8 Pro after the MIUI update

Owners of the popular Redmi Note 8 Pro smartphone often face a situation when, after a scheduled update of the MIUI operating system, the device stops charging at maximum speed. Instead of the usual zipper icon with the words "Quick Charge" or "Turbo Charge", the screen displays a regular battery icon, and the time for full energy recovery increases by many times. This is a common software error that can be caused by resetting energy saving settings or conflicting drivers of the power controller.

In most cases, the problem is solved without going to the service center, because the hardware of the device remains intact. Fast charging on your gadget has not disappeared, it has simply gone into sleep mode or been blocked by system restrictions. You need to consistently check several parameters, ranging from the physical connection of the cable to hidden engineering menus.

Do not ignore this issue, as constant charging with low power can lead to uneven heating of the elements inside the case and accelerated degradation of the lithium polymer battery. In this article, we will discuss in detail the algorithm of actions that will help return the manufacturer's declared power of 18 watts and ensure stable operation of your smartphone throughout the day.

Diagnostics of the problem: why fast charging disappeared

Before taking action, it is important to understand the nature of the failure. After installing a new version of MIUI, the system often optimizes background processes, which can affect the power consumption profile. The charge controller may mistakenly identify the connected device as incompatible with the fast charging protocol if the digital signatures of the drivers are updated incorrectly.

Another common cause is physical wear or contamination of the USB Type-C charging port. Microscopic dust stuffed into the connector prevents all contacts from contacting tightly, which causes the négociation between the charger and the phone to occur at a baseline level of 5V/1A. It is also worth considering the condition of the cable itself, which could have damaged inside the insulation.

⚠️ Warning: If your smartphone starts to heat up in the bottom of the case while charging, stop using the current adapter immediately.This may indicate a short circuit or a power controller malfunction.

Software failures are often disguised as hardware problems. If you use a non-original power supply, a system update could have blocked it from working, as Xiaomi implements accessory certification checks, in which case the system forcibly reduces the charge current to protect the device.

Checking the compatibility of the charger and cable

The first step in restoring functionality is to check the physical power chain. Your Redmi Note 8 Pro supports Quick Charge 3.0 and USB Power Delivery. To work properly, all components of the circuit – the socket, power supply, cable and smartphone connector – must support these standards.

Note the labeling of your charger. The original power supply must have output options including 9V or 12V. If you use a cheap analog, it can only output standard 5Vs, which is not enough to activate the fast charging mode. After the software update, the system has become more strict about such discrepancies.

Cheap wires often lack the necessary resistance on the contacts that tell the phone that the high current is possible, and it is recommended to use the original cable from the kit or certified analogues no longer than 1 meter long.

Try connecting your smartphone to another computer through USB-If charging is slow, it's normal for a PC port. If the phone doesn't see the connection at all, the problem may be the connector. Carefully, using a wooden toothpick or a plastic shovel, try to clear the port of pile.

Configure the battery settings in the MIUI menu

There are hidden and explicit settings in MIUI that control battery life. Once upgraded, some options may be reset to factory values that are not always optimal. You need to manually check the power saving configuration.

Go to Settings, then select Battery and Performance, and make sure that you don't activate Power Savings or Ultra Savings, which artificially limit the current charge to extend the running time in critical situations, and switch the performance profile to Balanced or Performance.

⚠️ Warning: Do not use third-party apps from the Play Market that promise to “accelerate charging by 2 times.” They do not have access to a hardware controller and often contain advertising modules that, on the contrary, discharge the phone.

It's also worth checking charging optimization settings. Newer versions of MIUI have the Optimized Charging feature, which learns your habits and can pause charge at 80% or reduce current at night. While it's good for the battery, it can be perceived by the user as slow charging during the day.

Resetting and calibration of the battery

If the software settings didn't work, calibrate the battery, which helps the system re-determine the actual battery capacity and correctly display the percentages, which sometimes "wakes up" the fast-charging controller, a method based on a full discharge and charge cycle.

First, fully discharge the smartphone before you turn it off. Then, without turning the device on, charge it with the original adapter. Keep it on charge for at least 2-3 hours after the indicator shows 100%. Then perform a forced reboot by pressing the Volume Up button and Power.

In some cases, cleaning the system cache through the Recovery menu helps. Turn off the phone, then press Volume up and Power before the Mi logo appears. Select a language, go to Wipe Data -> Wipe Cache (don't confuse it with Full Wipe so you don't lose data!).This will delete temporary files that could have caused conflict after the update.

Use of the Engineering Menu to Activate QC

For advanced users, it is possible to activate fast charging protocols through an engineering menu, a powerful diagnostic tool that requires caution, and accessed through a special application or code in a "bell ringer".

You will need an app. MTK Settings (as Redmi Note 8 Pro runs on MediaTek Helio processor) G90T). If it is not in the standard menu, you can install it through ADB find APK-Reliable source file. In the menu, find the Power or Battery section.

Path to the menu (example):


EngineerMode -> Power -> Battery Test -> Quick Charge Enable

You can force QC 3.0 support to be enabled here. However, beware: changing unknown parameters can cause the device to work unstable. If you are not sure about your actions, you should skip this step or back up the data.

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Before entering the engineering menu, take a screenshot of all the current settings, which will allow you to return everything as it was, if after the changes the phone begins to behave incorrectly.

Frequent errors and ways to fix them

Even following the instructions, users may encounter nuances, such as a phone that can only show fast charging when it is turned off, indicating that the background process running consumes power faster than it is supplied, or that heating the processor blocks high current.

Another mistake is using Do Not Disturb modes or game accelerators while charging, which can limit background synchronization, but sometimes conflict with power drivers. Try turning off all the accelerators and check the charge dynamics.

• 🔋 Overheating: Remove the case while charging if it is dense and does not remove heat well.
• 🔌 Bad contact: Try turning the plug over USB Type-C, the contacts could oxidize on one side.
• 📱 Background Apps: Close all heavy applications before setting for charging.

If nothing helps, perhaps the problem lies in the sub-board itself, which is a separate module in the Redmi Note 8 Pro, and is inexpensive to replace and often solves the problem forever, especially if the phone has been around for several years.

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In 90% of cases, the problem is solved by replacing the cable or cleaning the connector from dust. Software failure after an update is temporary and often corrects itself after a couple of charge-discharge cycles.