Owners of modern Xiaomi smartphones often wonder how to activate the wireless power transmission function. Many users mistakenly believe that this option requires a special switch in the settings menu to be activated manually before each use. In fact, in the vast majority of cases, intelligent power management takes over this process completely.
Simply put a compatible device on the surface of a powerbank or charging station to make the process go automatically, but there are nuances associated with reverse charging and diagnosing problems that every Mi or Redmi owner should know about. In this guide, we will examine all aspects of the Qi technology in the ecosystem of the Chinese manufacturer.
Principle of operation and activation of function
Xiaomi's wireless charging technology is based on the Qi standard, which involves inductive power transfer. When you put your phone on the charger, an electromagnetic field is triggered inside the device, inducing current in the receiver coil of the gadget. The activation process does not require you to open the settings or turn on Bluetooth, the system responds to a physical proximity event.
It's important to understand the difference between energy intake and energy output. If you're asking how to get your phone to charge from the station, you don't need to do anything. Just make sure the back of the device fits tightly on the charging surface. Centering the device relative to the charging coil is critical to getting started.
In some cases, especially when using third-party accessories or metal cell covers, charging may not start. The power controller's safety system blocks the current supply to avoid overheating or short circuit, in which case you need to remove the case or replace it with a wireless compatible one.
Reverse charging: manual activation
That’s a game-changer if you plan to use your Xiaomi smartphone as a powerbank to charge headphones, watches, or other phones, a feature called reverse wireless charging that requires manual activation in the operating system interface. Without activating this mode, the device will only consume power, but not give it away.
To enable the function, go to the settings menu. The path may vary slightly depending on the version of the MIUI shell or HyperOS, but the logic remains the same. Usually the path is as follows: Settings → Battery → Wireless charging. In the window that opens, you need to activate the slider "Reversible wireless"
Once the mode is turned on, the phone will emit a signal and be able to transfer power to another device placed on its back cover, and remember that this process consumes the battery of the main device quite quickly, the energy efficiency of wireless transmission is lower than that of wired transmission, so some of the energy is lost as heat.
☑️ Check before reversing
Configuring Constraints and Optimization
Xiaomi's Android system provides a battery protection tool. When you activate reverse charging, you often have a charge limit. If the battery is discharged below a certain threshold, the system will prevent you from turning on the power output so that the phone does not turn off completely.
The wireless charging menu also features optimization settings that allow you to turn off the function automatically when the charger is fully charged, preventing what is known as a “microcyclic” charge that is harmful to the chemical structure of the lithium polymer battery.
Some users experience a situation where the function is turned on and off, which may be due to power saving settings, and see if Super-Savings mode is worth it, which blocks energy-intensive processes, including power transfer over the air.
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Use original chargers with a power of at least 18-20 watts to quickly charge the base itself or the phone in reverse mode. Weak power supplies may not be able to cope with heating.
Indication and charging statuses
Understanding the light and sound signals of the device helps control the process. Xiaomi smartphones are equipped with a sophisticated notification system. When you put the phone on the base, a characteristic beep is heard, and animations with lightning appear on the screen.
The color of the indicator or animation can vary depending on the charging speed and battery status. For example, green lightning usually means standard speed, and special animation with numbers - turn on the turbo mode Mi Turbo Charge, if the base supports the appropriate protocols.
- 🔋 Constant glow - there is a normal charging process.
- ⚡ Blinking indicator – positioning error or (foreign object) between coils.
- 🌡️ Red color - critical overheating, the process is suspended by the security system.
- 📳 Vibration and sound – confirmation of the beginning of energy transfer.
If you use reverse charging, the main device will also display a timer and percentage of the charge of the plug-in if the protocol allows data exchange, otherwise you will only see the power output status.
Compatibility of models and technical specifications
Not all Xiaomi smartphones support wireless charging, a feature that is available primarily in the flagship Mi, Xiaomi (digital series) and some Mix models. Redmi and POCO budget smartphones are often devoid of a receiving coil for space and cost reasons.
Below is a table with information on support for charging technologies in popular models:
| Smartphone model | Wireless charging | Reversible charging | Max. power (Watt) |
|---|---|---|---|
| Xiaomi 13 / 13 Pro | Yes. | Yes. | 50 / 10 |
| Xiaomi 12 / 12S | Yes. | Yes. | 50 / 10 |
| Xiaomi Mi 11 | Yes. | Yes. | 50 / 10 |
| Redmi Note 12 | No. | No. | - |
| POCO F5 | No. | No. | - |
For models that do not have a built-in coil, there are special adapters-receivers connected to the USB Type-C connector. However, their use is not recommended, since they occupy a port, stick out of the case and do not allow you to implement the reverse function.
Why are there no wireless charging in public sector?
The effect of accessories on efficiency
Protective cases are the most common obstacle to the normal operation of wireless charging. the thickness of the material and the presence of metal inclusions (plates for magnetic holders, decorative elements) can block the magnetic field or cause heating.
The optimal thickness of the case for stable operation is up to 3-4 mm. If you use a larger shock case, the charging may not start or will work intermittently.
⚠️ Warning: Never put credit cards, keys or other metal objects between your phone and the charger, which can cause them to become too hot and damaged, and cause the charger to crash.
There are special magnetic rings (MagSafe-compatible) that can be pasted on the back of a phone without wireless charging to use magnetic power banks, but they won’t transmit the energy themselves if there’s no hardware inside the smartphone.
Diagnosis and
If wireless charging is not working, first check the power supply. Charging bases, especially powerful (50W and above), are often sold without a power supply kit or require a connection to a unit of a certain power. USB-The computer port will not give the right current.
Also, you should pay attention to the temperature of the ambient and the device itself. At too low a temperature (below 0 ° C), the chemical processes in the battery slow down, and the controller can prevent charging. Similarly, if you overheat above 45 ° C, the system will stop the process.
- 🧹 Clean the surfaces – dust and dirt increase the distance between the coils.
- 🔄 Reboot your smartphone – it will reset the errors of the software power controller.
- 🔌 Check the cable – use the original cable at least 4A thick (usually orange in color).
- 📱 Remove the cover - eliminate the influence of accessories.
In rare cases, the problem may be a software failure of the MIUI shell. Check for system updates in the About Phone section. Often security and optimization patches fix peripheral bugs.
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If the phone warms up when charging wirelessly more than usual, it is normal for high speeds (50W+), since the efficiency of the process is below 100%, and some of the energy is dissipated into heat.