Modern smartphones like the Xiaomi 10S are equipped with advanced power technologies that allow you to replenish the battery in minutes. However, not all users require maximum charging speed every day, especially at night or when using the device in hot weather. High power often leads to increased heat generation, which can adversely affect the long-term safety of the lithium polymer battery.
Owners of Xiaomi and Redmi’s flagship lineups often wonder if it is possible to programmatically limit power supply to extend the life of the gadget. Unfortunately, the global versions of MIUI firmware and the new HyperOS lack a standard switch that completely prohibits fast charging protocols. However, there are proven methods to bypass this limitation, allowing you to achieve the desired result without losing warranty.
In this article, we will discuss in detail what physical and software methods are available for Xiaomi 10S. You will learn about hidden engineering menus, the features of using original and third-party accessories, as well as how to correctly interpret the indication on the lock screen.
Why you might need to shut down fast charging
The main reason users are looking for a way to limit charging power is because of the physical and chemical processes inside the battery: Lithium-ion cells are extremely sensitive to overheating. When using fast-charging protocols such as Qualcomm Quick Charge or proprietary Xiaomi Turbo Charge, the battery temperature can reach 40-45 degrees Celsius and above.
Prolonged exposure to high temperatures accelerates electrolyte degradation and anode structure destruction, causing even a new phone to run out by mid-afternoon after a year of active use, reducing charging speeds to minimize heat, making the process more gentle for battery chemistry.
⚠️ Warning: Constant charging at maximum power in high ambient temperatures (such as direct sunlight or on the dashboard of a car) can cause the battery to swell.
Also, charging at full speed at night doesn't make any practical sense. When you sleep, the time spent on replenishing energy doesn't matter. In this case, it's more important to keep the battery healthy than to save 30-40 minutes. Turning off the turbo mode also reduces the load on the motherboard's power controller, which reduces the overall power consumption of the system in downtime.
Use of the original adapter and cable
The first and most obvious, but often overlooked, aspect is the compatibility of the charger.The Xiaomi 10S smartphone supports the 120W HyperCharge protocol (depending on the regional version) or 67W. Activating these modes requires only the original power supply and cable labeled 6A.
If you use a third-party power supply, even a high-quality one, the smartphone will automatically go to standard charging mode (usually 10W or 18W).This is due to the lack of handshake protocol between the charger and the phone. So the easiest way to "disable" fast charging is simply not to use the original adapter.
- 🔌 Use any power supply without protocol support QC or PD — The phone will charge slowly.
- 🔌 Replace the cable with a thinner or older cable that does not support a current of more than 2A – this will forcefully reduce power.
- 🔌 Connect the phone to USB-port of a computer or laptop – power is limited by the standard USB (2.5W - 4.5W).
It is important to note that using non-original accessories is not harmful to the phone if they are certified. On the contrary, for overnight charging, it is even preferable. However, if you use the original unit, but want to slow down, you will have to resort to software methods or physical tricks, which will be discussed later.
Software Restrictions through the Engineering Menu
For more advanced users who want to gain control of the system, there is access to hidden Android settings. The MIUI shell contains an engineering menu that allows you to test different modules of the device. Although there may not be a direct button to turn off fast charging, you can find parameters that affect battery behavior.
To enter the engineering menu, you need to open the Phone app and type a special code. The interface may vary depending on the firmware version. Be careful: changing unknown parameters can lead to unstable system operation.
##6484##Once you enter the code, the CIT (Customer Information Test) menu will open, and you will find the battery or charging section, and some firmware versions offer the option of resetting battery statistics or calibration, which can indirectly affect the charging algorithms if the system has previously behaved incorrectly.
What if the code doesn't work?
It is also worth mentioning the existence of ADB-commands that can limit the charging current at the kernel level, but this requires root rights and a deep knowledge of Linux. For the average user, this method is not recommended because of the high risk of turning the phone into a brick".
Charging optimization function in MIUI and HyperOS
Xiaomi has implemented smart algorithms that are supposed to automatically protect the battery, called Night Charging Optimization, which doesn't shut down fast charging completely, but it pauses when the charge level reaches 80%, and completes the remaining 20% just before you wake up.
To activate this function, you need to go to the system settings. The path may vary slightly, but it usually looks like this:
- Open the Settings.
- Go to the Battery section.
- Click on the gear icon in the upper right corner.
- Find the item Optimize night charging and turn it on.
This feature uses machine learning to analyze your habits. If you normally go to bed at 23:00 and get up at 7:00, the phone will charge quickly to 80% and then go into standby mode.This significantly reduces the time the battery spends under high voltage, which is critical for longevity.
⚠️ Attention: Optimization only works if you use your phone regularly. If the mode of the day is constantly changing, the algorithm may not work correctly and not recharge the phone by the right time.
☑️ Checking battery settings
Comparison of power limitation methods
To make it easier for you to choose the right method, we have compiled a comparison table that shows the effectiveness of various ways to reduce charging speeds for the Xiaomi 10S model.
| Method | Efficiency | Security | Difficulty |
|---|---|---|---|
| Third-party power supply | High (reduces to 10-18W) | Absolutely safe. | Minimum |
| USB-port | Maximum (up to 2.5-4.5W) | Absolutely safe. | Minimum |
| Optimization of MIUI | Medium (controls time) | Safe. | Minimum |
| Engineering menu | Low (depending on version) | Risk of settings failure | Tall. |
As you can see from the table, the most efficient and safe way is to use a less powerful power source, and software methods are mainly aimed at optimizing time, not physically limiting current.
Effect of temperature on charging speed
The Xiaomi 10S is equipped with an advanced thermoregulation system, and if the phone heats up above a certain temperature (usually around 40-42 degrees), the system automatically reduces the charging current or completely suspends it until it cools down.
It's a built-in protection mechanism that you can't turn off without modifying the core of the system, so if your goal is to protect the battery from overheating, you can simply keep the case on while charging (if it's dense) or put the phone on a cool surface, and in response to heating, the device will go into gentle mode.
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Place your phone on a metal or ceramic surface while charging – these materials are better at removing heat than wood or fabric, allowing the support system to lower the charging current faster.
However, relying on heating alone is not a good idea, as cyclical heating and cooling are also harmful to the battery.
Common myths about fast charging
There's a lot of misconceptions about fast charging, and you'll hear a lot of times, "fast charging kills the battery in six months." It's not quite true. The current power controllers in Xiaomi 10S divide the process into stages: fast dialing up to 50-60% and slow machining up to 100%.
The main wear and tear occurs in the recharge phase and when you are in 100% charge under voltage. So even if you can't turn off a quick start, try not to leave your phone charging after you reach full charge. Using smart sockets or automation scenarios can help.
- 🚫 Myth: 100 percent charging is always bad. Reality: It's bad to stay 100 percent long, short-term maximum is okay.
- 🚫 Myth: You have to completely discharge your phone. Reality: Lithium polymer batteries are better kept in range. 20-80%.
- 🚫 Myth: Third-party apps can control the current. Reality: Without root rights, apps only show statistics, but don't control the controller.
⚠️ Warning: Do not try to seal the contacts on the cable or use foil "crutches" to simulate bad contact.This can lead to sparkling, damage to the charging port and even fire.
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The most reliable way to reduce charging speed is to use a less powerful power supply, rather than looking for hidden software switches that may not exist in your firmware version.