Xiaomi Redmi’s reversible charge feature has become one of the most talked-about innovations in recent years, allowing you to use your phone as a portable charging station for other gadgets, from headphones to smartwatches or even another smartphone. But how does this function work, which Redmi models support it, and are there pitfalls? In this guide, we’ll go through all the nuances, from technical principles to practical tips for use.
It’s important to understand that reverse charging isn’t just a marketing stunt; it’s based on the USB Power Delivery (PD) standard and requires both hardware and software support. While Xiaomi’s flagship models (such as the Mi 11 or 13 Pro) were among the first to get this feature, the Redmi lineup has only recently begun to embrace the technology, meaning that not all devices in the series support reverse charging, and those that do may have power or compatibility limitations.
If you are a Xiaomi Redmi owner and want to know if you can charge other devices from your phone, how to do it safely and efficiently - this article is for you. We will also break down the hidden MIUI settings that allow you to activate reverse charging even on models where it is not officially announced.
What is Reverse Charging and How Does It Work
Reverse charging is a technology that allows a smartphone to give energy through a device. USB-In fact, your Xiaomi Redmi turns into a power bank, but with important caveats: transmission power is usually limited, and the process drains the phone’s battery.
Technically, this works due to two key components:
- 🔋 Power controller with support USB PD (or Qi for wireless reverse charging), which controls the direction of current.
- 🔌 Bidirectional port USB-C, It can both receive and release energy (in older models with Micro-USB this function is impossible).
- 📱 Software firmware that activates the mode through Settings → Battery or hidden menus.
In most cases, reverse charging on Redmi is implemented over a wire (via USB-C), but some flagship models (for example, Redmi K50 Pro) support wireless back charging according to the Qi standard. Transfer power varies from 2.5W to 10W depending on the model – this is enough for headphones or smart watches, but not for fast charging another smartphone.
Important: Reverse charging is not designed for permanent use, it puts additional stress on the battery and the power controller, which can speed up battery wear during frequent discharge/charging cycles.
What Xiaomi Redmi models support reverse charging
Not all Xiaomi Redmi smartphones are equipped with this feature, and below is a table with current models (as of 2026), where reverse charging is available officially or through hidden settings:
| Model | Type of charging | Max. power (W) | Whether activation is required |
|---|---|---|---|
| Redmi K60 Pro | Wire (USB-C) | 5 | No (on by default) |
| Redmi K50 Pro | Wireless + Wireless (Qi) | 10 (wire) / 5 (Qi) | Yeah (hidden menu) |
| Redmi Note 12 Pro+ | Wired | 5 | No. |
| Redmi 10C | Wired | 2.5 | Yes (for some regions only) |
| POCO F5 Pro (based on Redmi) | Wired | 5 | No. |
Note that even if your model is on the list, the feature may be disabled by default in some regions (e.g., European MIUI firmware), and reverse charging is often absent in budget models (Redmi 9A, Redmi A1) due to hardware limitations.
How to turn on reverse charging on Xiaomi Redmi
The activation process depends on the model and version of MIUI. Let's consider both the official and hidden settings.
Official method (for supported models)
- Connect Redmi to the charger (reverse charging only works when connected to the network!).
- Go to Settings → Battery → Recharge mode.
- Activate the switch and connect the second gadget via USB-C cable.
On some models (for example, Redmi Note 11 Pro+), the option may be called “Charging other devices” and may be located in the Additional section.
Activation via the Engineering Menu (for informal support)
If there is no chargeback option in the settings, but your model is equipped with USB-C and a USB PD controller, you can try to enable the function through the hidden menu:
Charge your phone to 50% or more
Use the original USB-C cable
Connect your phone to charge (required!)
Download the app "MIUI Hidden Settings” (informal)-->
##4636## → Go to “Battery Information” → Press 5 times on “Charge Level”
or
Enter the phone code in the app: ##284## → Select "Reverse Charge" → Enable⚠️ Attention: Not all models support these commands. Incorrect actions in the engineering menu can cause malfunctions in the phone. If after activation the device begins to overheat or discharge quickly, turn off the function and reset the battery settings in Settings. → System system → Resetting settings → Resetting battery settings.
Limitations and Risks of Reversible Charging
Despite the convenience, the technology has serious limitations:
- ⚡ Low power: Maximum 10W (on the Redmi K50 Pro – this is enough for headphones, but not for fast charging another smartphone.
- 🔥 Overheating: With prolonged back-charging, the phone can heat up to 45-50°C, which is bad for the battery.
- 📉 Fast discharge: Your Redmi will lose 1-2% Charge per minute during energy transfer.
- ⚠️ Incompatibility: Not all devices support smartphone charging (for example, an iPhone may not recognize a power source).
The critical thing is that reverse charging only works when you plug your Redmi into a power outlet, so the phone charges and gives off power at the same time, otherwise it will just run out in a few minutes, which makes it less useful on trips where there is no access to the network.
⚠️ Warning: If you use a non-original cable or charger, the risk of port damage USB-C Increases 3x: Xiaomi officially recommends cables with support USB PD and with a power of no less 18W.
What happens if you interrupt the back charging by abruptly turning off the cable?
Practical Applications: When Reversible Charging Is Really Useful
Despite the limitations, there are scenarios where the function becomes a salvation:
- Charging wireless headphones (Xiaomi Buds, AirPods): 10 minutes of charging back will give 1-2 hours of battery life.
- Emergency charging of smart watches (Mi Band, Amazfit): enough for 1-2 days of use.
- Transferring power to another smartphone in a critical situation (for example, when a friend’s phone is dead and you need to make an important call).
- Nutrition of mini-gadgets: fitness trackers, electronic cigarettes, portable speakers.
Example: you're on a trip, you've got 20 percent charge left on the Redmi Note 12 Pro+, and the Xiaomi Buds 4 headphones are dead, plug them into your phone for 5 minutes, and you get another hour of music, and your Redmi will lose only 3-4% charge.
💡
If you use headphone reversible charging frequently, buy a short USB-C → USB-C cable 10-15 cm long.This will reduce the load on the port and reduce the risk of damage when you move quickly.
Comparison with alternatives: power bank vs reverse charging
Many users ask, why do you need to charge back when you can buy an external battery?
| Parameter | Reverse charging (Redmi) | Power Bank (10,000 mAh) |
|---|---|---|
| Max. power (W) | 2.5–10 | 18–30 |
| Autonomy | It only works when connected to a power outlet. | Works without a socket (capacity 10000-20000 mAh) |
| Charging speed | Slow (5W - like 2015 charging) | Fast (up to 30W on modern models) |
| Universality | Only USB-C devices | Any device (USB-A, USB-C, Lightning) |
| Convenience | Always carry a separate device (no need to carry a separate device) | Additional gadget in the backpack |
Bottom Line: Redmi reverse charging is an emergency option when there is no power bank at hand.For regular use, it is better to buy an external battery with USB PD.
💡
The main advantage of reverse charging is that it is always with you, but in functionality it loses even to the budget power bank for 1000-1500 rubles.
Frequent problems and their solutions
Users often have difficulty using reverse charging, and here are the most common errors and ways to fix them:
- 🚫 "Feature not enabled": Make sure the phone is connected to charging (required!).Try another cable or port.
- 🔌 "Device not recognized": Check compatibility (e.g. iPhone may not charge from Android smartphone) Use a cable with support USB PD.
- 🔥 "Phone warms up a lot": Turn off the function and let the device cool down. Don't use reverse charging at temperatures above 30°C.
- 📵 "Charging interrupted": "Probably overheating protection worked. Try to reduce the load (e.g., don't play games while recharging).
If after activating reverse charging, the phone began to discharge quickly even in normal mode, perform battery calibration:
- Reduce the phone to 0% (until it turns off).
- Charge to 100% without interruption (use original charging).
- Repeat the cycle 2-3 times.
⚠️ Note: Some Redmi models (e.g. Redmi) 9T) After activation of hidden reverse charging, fast charging may disappear, in which case, return the settings to the factory or roll back to the previous version. MIUI.