Many Xiaomi and Redmi smartphone users face a dilemma: modern fast-charging standards allow you to fill the battery in an hour, but often raise concerns about the battery’s durability. High power transfer rates inevitably lead to heating the device, which is the main enemy of lithium-polymer batteries. If you want to extend the life of your gadget, abandoning aggressive power modes can be a smart move.
Unfortunately, the standard MIUI interface or the new HyperOS didn't include a simple "Stop Fast Charging" switch, and the system automatically detects the connected power supply and activates the QC (Qualcomm Quick Charge) or PD (Power Delivery) protocols without the owner's knowledge, but there are workarounds that allow you to artificially limit current or switch the smartphone to normal charging mode.
In this guide, we will take a detailed look at software and hardware solutions, how to use the engineering menu, what ADB commands will help limit current, and why it is sometimes enough to simply replace the cable. It is important to understand all the risks before making changes to system parameters.
Why you should limit the speed of charging
The main reason Xiaomi owners are looking for a way to turn off the turbo mode is thermodynamics: When charged with currents of 33, 67 or even 120 watts, the internal resistance of the battery causes active heat generation. Overheating accelerates the degradation of the electrolyte and leads to an irreversible decrease in capacity after a year or a half of active operation.
Also, constant power surges and sudden changes in current are having a negative impact on the power controller. If you leave your phone charging overnight, there's no need for Super Charge. At night, stability and low temperature are more important than speed.
⚠️ Warning: Constant charging at maximum currents at high ambient temperatures (in the summer in the heat) can cause the battery to bloat.
Software restrictions in MIUI and HyperOS settings
The first thing to check is the built-in optimization features. Although there is no direct button to turn off fast charging, the system offers tools for gentle mode. New firmware versions have introduced Optimized Night Charging, which artificially slows the process down by stretching it for 8 hours.
To activate, go to Settings → Battery → Battery Protection. Here you should turn on Optimized Night Charging. The algorithm learns your routine: it will quickly charge the phone to 80%, and then stop the process, achieving the remaining 20% by the time you wake up, which reduces the time of the battery under high voltage.
Also worth noting is the power saving mode, which can limit background processes when activated, which indirectly reduces heating during charging, although current strength is not affected, and some users note that turning on the Airplane mode during charging also slightly reduces heat generation.
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Use the original cable, but connect it to a regular USB 2.0 port on your computer or an old 5V/1A power supply – this is guaranteed to turn off fast charging without software interventions.
Using an engineering menu for diagnosis and customization
A more advanced method involves accessing hidden system settings through an engineering menu, which requires caution, as changing incorrect settings can lead to unstable work Redmi. USSD-code.
Enter the code ##6484## or #3646633##. If the code doesn't work (which is often the case on global firmware), you'll need to install the Engineer Mode MTK app or the Snapdragon processor analog.
Within the Battery Test or Power section, charge current restriction settings may be available. However, on most modern Xiaomi models, these fields are locked or hidden. If you are lucky and the fields are active, you can try to lower the Input Current Limit value. Beware: setting too low values can cause the phone to stop charging altogether.
What do I do if the codes don't work?
ADB Method: Forced Current Limitation
The most reliable software method is the use of debugging by USB and command line ADB (Android Debug Bridge. This method allows you to send commands directly to the system, bypassing the interface constraints. You'll need a computer, USB-cable and installed drivers ADB.
First, turn on the debugging. USB on the phone: go to Settings → The phone. → 7 times press "Version" MIUI", Then in the advanced settings activate the debugging by USB. Connect your smartphone to your PC and enter a command to check the connection.
adb devicesOnce confirmed on the phone screen, you can try to enter commands to change the charging parameters. However, it is worth noting that the setprop command to change the current limit often requires root rights. Without superuser rights, you can try resetting the power adapter settings:
adb shell dumpsys battery resetThis command resets the battery state emulation, but doesn't always disable the physical fast-charging protocol. For real root-free current restriction, commands emulating a weak-source connection are often used, but their effectiveness depends on the specific processor model and Android version.
⚠️ Attention: Incorrect use of commands ADB You can have a bootloop, and you do everything at your own risk, backup important data.
☑️ Pre-use checks ADB
Hardware solutions and cables
Quick Charge and Power Delivery fast charging protocols work only if there is a coordinated cable and power supply. If you use a cable that does not support high currents (for example, an old USB 2.0 without thickened veins), the phone will automatically go to normal charging mode (5V/1A or 5V/2A).
Special services can also be used. USB-Adapters that trick the power supply into giving the standard 5 volts instead of the increased 9, 12 or 20 volts are completely safe and do not require any software intervention.
Comparison of disconnection methods:
| Method | Difficulty | Efficiency | Risks. |
|---|---|---|---|
| Nighttime optimization | Low. | Medium (night only) | Absent. |
| Weak cable/block | Low. | Tall. | Absent. |
| Engineering menu | Medium | Tall. | Medium (failure of settings) |
| ADB teams | Tall. | Tall. | High (no experience) |
Effect of temperature on the charging process
Keep in mind that temperature is the main trigger for a battery management system (BMS).If a smartphone heats up above a certain mark (usually 40-45 degrees), the Xiaomi controller will self-reset the charge current to a minimum, ignoring the fast charging settings.
So if your goal is to keep the battery, sometimes it's enough to keep it cool: remove the thick case, don't put the phone on soft surfaces (sofa, bed) while charging, put the device on a cold surface, such as a tile or a metal plate.
Using external coolers for smartphones can also indirectly affect speed by allowing the system to keep a higher current without overheating, but in the context of our task (slow charging), it is best to avoid active cooling unless you are using weak power supplies.
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The safest and most effective way to turn off fast charging is to use the original cable paired with an old 5 Volt power supply, which ensures that there is no overheating without the risk of software failure.