How to turn off fast charging on Xiaomi Redmi Note 8

Modern smartphones, including the popular Xiaomi Redmi Note 8, feature accelerated battery recharge technology that significantly reduces the latency of the outlet. However, despite the obvious benefits, Quick Charge mode is not always the desired one for the user. Many owners experience the device overheating during the energy recovery process, raising concerns about the safety of internal components and the durability of the battery itself.

The question of how to turn off fast charging on the Redmi Note 8 becomes especially relevant at night or when using a smartphone as a navigator, when speed does not matter and heat generation is critical. The standard settings of the MIUI shell do not offer a direct off button, which often puts inexperienced users at a loss. In this article, we will discuss in detail the software and hardware ways to limit the power of current entering your device.

It is worth noting that the complete software disabling of the fast charging protocol at the system level in Xiaomi is often limited by the manufacturer's policy.However, there are effective workarounds that allow you to reduce the charge current to safe values of the standard charge. USB-Understanding the physical processes inside the Li-Po battery will help you make the right decision about whether to manipulate it.

Why it is necessary to limit the current charge

The main reason why users are looking for a way to turn off fast charging on the Xiaomi Redmi Note 8 is to heat the case and battery. Quick Charge technology involves the supply of increased voltage or current, which inevitably leads to the release of heat according to the laws of physics. If the smartphone is in a case or lying on a soft surface, the heat sink deteriorates, and the temperature can reach critical values.

Prolonged exposure to high temperatures is detrimental to the chemical structure of a lithium-polymer battery, leading to accelerated capacity degradation, bloating and, in rare cases, failure of the power controller. In addition, overheating affects the performance of the processor: the MIUI system can artificially lower the CPU frequencies to cool the device, making the interface work slowly even in idle.

⚠️ Warning: Constant charging of the smartphone at maximum speeds in conditions of poor ventilation (for example, under a pillow or in a dense silicone case) can lead to irreversible damage to the battery and loss of warranty.

Speed limits are also useful if you charge your phone from a portable power bank with a small capacity or low recoil current. In such situations, trying to take maximum current can lead to unstable operation of the external battery or its rapid discharge. For night charging, when time does not matter, reducing power is the most gentle mode of operation.

Software Methods through Engineering Menu

One of the most effective ways to influence the charging process is to use the hidden MIUI engineering menu. This interface is designed for testing equipment by developers, but is also available to ordinary users. To get there, you need to open the Phone application and type the combination ##6484##. If the code does not work, try ##364## or go through the About menu, quickly clicking on the MIUI version seven times to activate the developer rights, and then selecting Testing in the advanced settings.

Inside the engineering menu, we're interested in the battery-related section. Navigation may vary depending on the firmware version, but the path usually looks like Battery info or Charger Test. Here you can see the current connection status and current parameters. Some menu versions allow you to force the USB mode to switch from Fast Charge to standard USB 2.0, although this feature is often hidden or blocked on global firmware.

It is important to understand that changes in the engineering menu can be reset after the device is restarted. This is done specifically for safety, so that the user does not accidentally set incorrect parameters that can damage the iron. If you find a parameter limiting the current, but it is reset, you may need to use third-party utilities with Root rights, but this already carries the risk of losing the warranty.

⚠️ Warning: Do not change the settings in the engineering menu unless you are sure of their purpose.Resetting the battery calibration or changing the voltage thresholds may lead to incorrect display of the percentage of charge.

Use of controller applications

If Xiaomi’s built-in tools don’t work, specialized apps from the Google Play store come to the rescue. Software like Battery Charge Limit or AccuBattery allows you to flexibly adjust charging thresholds. While they can’t physically disable the fast charging protocol at the controller level without root rights, they effectively manage the process by stopping the current when a certain level is reached, for example, 80%.

The utilities are based on voltage and temperature monitoring, and the app constantly queries the sensors, and if it detects a temperature surge or a set limit, it tells the system to stop charging, which creates a drip-charging effect that is much safer for battery chemistry than a continuous Quick Charge.

For advanced users with superuser rights (Root), it opens the possibility of using Magisk modules or scripts embedded directly into the core of the system. GMS Doze or specific tweaks for MIUI, can forcibly limit the strength of the current supplied to the input of the power controller, emulating the connection to the usual USB-port.

Hardware solutions: cables and adapters

The easiest and most reliable way to disable fast charging on the Redmi Note 8 without interfering with the code is to use the wrong charger or cable. The Quick Charge protocol is activated only when the charger and smartphone "agree" to increase the voltage. If one of the participants in the process does not support the protocol, the charging will go at a standard speed of 5 Volts / 1-2 Amperes.

Use an old power supply from another smartphone, tablet or TV that doesn’t support accelerated charging technology, or you can take a low-quality cable or a damaged wire that is physically unable to pass high-power current, in which case the Xiaomi power controller will automatically go into safe slow charging mode.

There are also special USB-adapter-triggers that physically close certain contacts in the connector, prohibiting high-voltage negotiation. By connecting such an adapter between the cable and the phone, you are guaranteed to get a standard charge rate, regardless of the capabilities of your power supply.

💡

Use it. USB-port of a computer or laptop to charge Redmi Note 8. Standard ports USB 2.0/3.0 vent 0.5And - 0.9A, which eliminates the possibility of fast charging and minimizes heating.

The influence of temperature and environment

The BMS battery management system in the Xiaomi Redmi Note 8 is equipped with intelligent protection algorithms. If the battery temperature drops below +5 ° C or rises above +45 ° C, the controller automatically reduces the current or completely stops charging. This is an integrated safety mechanism that can not be turned off software without the risk of fire.

If you want to slow down your charging, try not to remove the protective case during the process, especially if it is made of dense silicone or leather, this will worsen the heat transfer, and the system, once the temperature rises, will drop the speed to its minimum, but this method should be used with caution to prevent overheating above critical values.

The reverse is true when charging in a cold room: at low temperatures, the chemical reactions inside the Li-Po cell slow down, and the phone may show a long 1% or no charge until the battery warms up, and in such conditions, fast charging is also not activated, as it is dangerous for a cold battery.

Comparison of charging speed in different modes

So that you can see the difference between the modes, we've compiled a comparison table, and the data is averaged for the Redmi Note 8 with a 4,000 mAh battery.

The table shows that the use of a conventional power supply or USB-The PC port increases charging times, but the temperature remains within comfortable limits.

💡

Using a weak current source (USB PC or old 5B unit) is the only guaranteed way to avoid fast charging without root rights and complex settings.

Frequently Asked Questions (FAQ)