Xiaomi Redmi 8 Pro is one of the most popular budget smartphones with support for fast charging technology, but many users are faced with the fact that the device charges too slowly. The reason is often not hardware limitations, but incorrect settings or use of incompatible accessories. In this article, we will discuss all the official and hidden ways to activate Quick Charge 3.0 on your Redmi 8 Pro, and explain why even with the feature on, the speed can remain low.
It's important to understand that the Redmi 8 Pro is equipped with a Qualcomm Snapdragon 665 processor that supports Quick Charge 3.0 (up to 18 watts), but by default MIUI limits power to 10-12 watts to save battery life. To unlock full potential, you will need not only the right charger, but also system setting adjustments. We tested all methods on MIUI 12-14 firmware and are ready to share working solutions.
1. Compatibility Check: Does your Redmi 8 Pro support fast charging?
Before you try to enable Quick Charge, make sure your device is capable of doing so at all. Xiaomi Redmi 8 Pro (model number M1906G7G) officially supports fast charging, but with caveats:
- ⚡ Maximum power: 18W (Quick Charge 3.0) when using Xiaomi’s original 18W charger or certified counterpart.
- ⚠️ Limitation MIUI: By default, the system reduces power to 10-12 watts to extend battery life.
- 🔋 Battery type: Li-Po 4500 mAh – supports high currents, but requires a high-quality power supply.
To check the current charging speed:
- Connect your smartphone to the charger.
- Open the Settings. → Battery.
- Click on the icon «⚡» in the upper right corner - the current power will be displayed (for example, 10W or 18W).
Critical detail: If your smartphone shows power below 10W even with the original charger, the problem may be a damaged cable or USB-C connector.
2.Official method: enable fast charging via MIUI settings
The easiest way is to activate the option in the battery menu, but in the latest MIUI versions, this item may be hidden.
- Go to Settings → Battery and Performance → Charging.
- Slip on the item “Fast Charging” (or “Optimized Charging” in new firmware).
- Activate the switch. If you don't have an option, read the next section.
If the “Fast Charging” item is not on the menu, it means one of three:
- 📱 You have an outdated version. MIUI (Update the firmware through Settings → The phone. → Updating the system).
- ⚙️ The option is hidden by the developers (solution – see the section about the developer mode).
- ⚡ A non-original charger is used (MIUI Blocks Quick Charge for uncertified accessories).
Original charger Xiaomi 18W+
USB-C cable with support for high currents (preferably original)
Updated MIUI firmware (version 12 and above)
Power saving mode is off.-->
3. Hidden settings: activation through developer mode
If the standard method didn't work, you can turn on quick charging via developer mode, which works on all versions of MIUI, but you need to be careful:
- Activate Developer Mode: Settings → About Phone → MIUI version (tap 7 times in a row) will appear notification “You became a developer”.
- Back to Settings → Additionally. → For developers.
- Find the item “Limit USB Charging” and turn it off.
- Reboot your smartphone.
After you restart, plug the charger and check the power in Settings → Battery. If the value has increased to 15W-18W, the method worked. If not, there is a problem in the hardware (cable, power supply or USB-C port).
What to do if the developer mode does not open?
⚠️ Attention: disabling the charging restriction USB This can cause the battery to overheat when using low-quality chargers!
4.Selection of charger: why the original power supply is important
Xiaomi Redmi 8 Pro requires a charger with support for Quick Charge 3.0 or USB Power Delivery (PD). Xiaomi's original 18W power supply (MDY-08-EM model) is ideal, but there are alternatives:
| Type of charger | Max. Power. | Compatible with Redmi 8 Pro | Notes |
|---|---|---|---|
| Xiaomi 18W (MDY-08-EM) | 18 W. | ✅ Complete. | The best option guarantees 18 watts. |
| Samsung Adaptive Fast Charging | 15 W. | ✅ Partial | Charges at 12-15 watts, but slower than the original |
| Anker PowerPort III (PD) | 20 W. | ✅ Complete. | Supports PD but is limited to 18 watts |
| Uncertified "no-name" | 5-10 W. | ❌ No. | MIUI blocks Quick Charge for security |
Important: Even if the power supply supports Quick Charge 3.0, the cable should be designed for high currents. The original Xiaomi cable or certified analogues (for example, Anker PowerLine) are the best choice. Cheap cables with thin wires can limit power to 5-10 watts.
💡
If you lose the original charger, check the power supply for the Qualcomm Quick Charge logo or the 5V/3A 9V/2A 12V/1.5A label.This ensures compatibility with the Redmi 8 Pro.
5. Software limitations: why MIUI blocks fast charging
MIUI firmware intentionally limits charging power in several cases:
- 🔋 Power saving mode: if activated, the charging speed drops to 5 watts.
- 🌡️ Battery overheating: at temperatures above 40°C MIUI automatically reduces the power.
- 📉 Battery wear: If the capacity falls below 80%, the system limits current.
- 🔌 Unoriginal accessories: MIUI Only certified chargers are recognized.
To eliminate the limitations:
- Turn off the Power Saving Mode in Settings → Battery.
- Check the battery temperature: If the smartphone is hot, let it cool.
- Update the firmware: Older versions of MIUI had bugs with Quick Charge recognition.
⚠️ Warning: If your Redmi 8 Pro suddenly stopped charging fast after the upgrade MIUI, Reset your settings through Settings → System system → Resetting settings → Resetting all settings. That'll bring back factory charging parameters.
6.Alternative methods: charging acceleration without Quick Charge
If you can not turn on Quick Charge, you can speed up charging in other ways:
- ⚡ Turn off your smartphone while charging – this increases speed by 20-30%.
- 📵 Air mode: disables communication modules (Wi-Fi, 4G), reduce the load on the processor.
- 🔌 Use the port. USB-C on a Power Delivery-enabled laptop (e.g. MacBook or modern ultrabooks).
Also help to turn off background activity:
- Go to Settings → Applications → Permissions → Autorun.
- Turn off auto-run for unnecessary applications (social networks, instant messengers).
- Enable Battery Optimization for all applications in Settings → Battery → Battery Optimization.
💡
The most efficient way to speed up charging without Quick Charge is to combine air mode and turn off your smartphone, which charges the Redmi 8 Pro 15-20% faster.
7.Diagnostics of problems: why fast charging doesn't work
If you’ve completed all the steps, but the Redmi 8 Pro is still charging slowly, check out:
| Problem. | Reason. | Decision |
|---|---|---|
| Power is not more than 5 watts. | Unoriginal cable or power supply | Replace with certified accessories |
| Charging jumps (there are 18 watts, then 5 watts) | Poor contact in the USB-C port | Clean the port with alcohol, check for curves |
| The phone is warming up and reducing power | Clogging of the cooling system | Clean the back cover of dust, use without loading |
| Quick Charge only works after restarting | Failure of the power controller | Update the firmware or reset the settings |
If the problem persists, check the battery status through the engineering menu:
- Open the Phone app and type ##4636##.
- Go to "Battery Information".
- Check the health option – if it’s different from Good, the battery is worn out and needs to be replaced.