The Xiaomi Redmi Note 8 Pro supports fast charging up to 18W, but many users are faced with the fact that the phone charges too slowly, and the reasons lie not only in the settings of the smartphone, but also in the choice of charger, cable, and battery state. In this article, we will discuss how to activate fast charging on the Redmi Note 8 Pro, which adapters are best suited, and what to do if the phone still charges slowly.
It’s important to understand that even if your Redmi Note 8 Pro supports Quick Charge 3.0, the charging speed depends on several factors: the quality of the power supply, the type of cable, the ambient temperature and the current state of the battery. We tested all possible ways to accelerate and collected them in this manual, from basic settings to advanced tricks.
1. Check support for fast charging on the Redmi Note 8 Pro
Before you try to speed up charging, make sure your Redmi Note 8 Pro supports this feature at all.The model is officially equipped with MediaTek Pump Express technology (similar to Quick Charge), but there are nuances:
- 🔋 Original adapter from the set — 18 Watt (5V/3And, 9V/2If you have another block, the speed may be lower.
- ⚡ Type-C cable must support current to 3Cheap cables limit power to 1-1.5And.
- 📱 Version. MIUI It affects the charging algorithms. In old firmware, fast charging could be turned off when heated.
To check the current charging speed:
- Connect the phone to the charger.
- Open the Security app → Battery.
- Click on the chart icon in the upper right corner.
- Look at current (in mA) and voltage (in B). Norm for fast charging: ~1500–2000 mA at 9V.
If the current is below 1000 mA, your charging is normal, and the reasons may be in the power supply, the cable, or the phone settings.
2. How to enable fast charging in MIUI settings
In the Redmi Note 8 Pro, fast charging is automatically activated when you plug in a compatible adapter, but sometimes you have to manually activate it.
- Go to Settings → Battery and performance.
- Select Battery Settings.
- Find Fast Charging (or Accelerated Charging in newer versions of MIUI).
- Activate the switch.
If this paragraph is not:
- 🔍 Maybe your version. MIUI It hides this setting. Try updating the firmware.
- 🔌 Connect the original adapter – sometimes the option only appears when detecting a compatible charger.
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If the phone gets too hot after fast charging, try removing the case while charging. Overheating can cause the accelerated mode to automatically shut down.
In some firmware (such as custom ones), fast charging may be called MTK PE+ or Pump Express Plus. If you use informal firmware, check the kernel settings in the engineering menu (#4636###).
3. Choosing the right charger and cable
Even if you activate a fast charge, the wrong adapter or cable will reduce its efficiency to zero.
| Adapter type | Max. Power. | Is it suitable for the Redmi Note 8 Pro? | Notes |
|---|---|---|---|
| Original (from the set) | 18 W. | ✅ Yes. | It supports MediaTek Pump Express. |
| Xiaomi 33W/65W (USB-C) | 33-65 W. | ⚠️ Partially. | It will charge 18 watts, but it can overheat. |
| Quick Charge 3.0 (Samsung, Anker) | 18-30 W | ✅ Yes. | Compatible, but the speed can be lower than the original by 10-15%. |
| Apple 5W/12W | 5-12 W | ❌ No. | Charges in normal mode (max. 1000 mA). |
| No-name adapters | Different. | ❌ No. | It can damage the battery or burn the power controller. |
In addition to the adapter, the cable is also important:
- 🔌 Original Type-C cable from the kit is the best choice.
- 🔗 Labeled cables USB 2.0 limit current to 1.5A. Look for it. USB 3.0 or USB-C to USB-C.
- ⚡ Cables with ferrite ring (thickening at the plug) are better shielded and less warmed.
How to check the cable for compatibility with fast charging?
Critical: Never use cables with damaged insulation or bent contacts, which can short-circuit and cause the Redmi Note 8 Pro power controller to fail.
4. Optimize phone settings for maximum speed
Even with the right adapter and cable, the Redmi Note 8 Pro can charge slowly due to background processes or MIUI limitations.
Turn off Wi-Fi and mobile data|Close all applications in the background|Disable geolocation|Put the phone in airplane mode|Remove the case (if the phone is warm)-->
Disabling background processes:
- Go to Settings → Applications → Autorun.
- Turn off auto-run for unnecessary apps (especially instant messengers and social networks).
- In Settings → Battery → Power saving mode, select High Performance (temporary shutdown of restrictions).
Airplane Mode: If you need to charge your phone as quickly as possible, activate the aircraft mode (Notification Storage → Airplane) and this will turn off all radio modules (Wi-Fi, 4G, Bluetooth) that consume energy and slow down charging.
Temperature control: If the battery is heated above 40°C, MIUI automatically reduces the charging current.
- 🌡️ Do not charge your phone in direct sunlight.
- 🧊 Remove the case (especially silicone or thick).
- 🔄 Do not use your phone while charging (games, videos, navigation).
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The fastest way to charge the Redmi Note 8 Pro is to use the original 18W adapter, Type-C 3.0 cable, aircraft mode and temperatures below 30°C.
5.Fast charging problems: Diagnostics and solutions
If you’ve done everything right, but your phone still charges slowly, the following problems may occur:
⚠️ Warning: If after charging, the phone shows a notification saying, "Charge is suspended. Battery temperature is too high," don't try to get around this restriction.
| Symptoms. | Possible cause | Decision |
|---|---|---|
| Charging is going to 500-800 mA | Unoriginal cable or adapter | Replace the original 18W unit and Type-C cable. |
| The phone does not recognize fast charging | The USB-C port or power controller is damaged | Check the port for debris. If there's a problem, contact the service. |
| Charging is switched on, then switched off. | Bad contact in the connector or a loose port | Clean the port with alcohol and carefully bend the contacts (only for experienced users!). |
| The phone is warming up and reducing current | High background energy consumption or damaged battery | Close all applications, lower the brightness of the screen. If it doesn't work, check the battery health in Settings → Battery → Status. |
If none of these things worked, maybe the problem is battery wear. The Redmi Note 8 Pro has a battery capacity that decreases over time, and after 500 charging cycles, fast charging can be unstable.
- Install the AccuBattery (Google Play) app.
- Charge your phone to 100% and watch the battery health.
- If the value is below 80%, the battery needs to be replaced.
6. Alternative methods of accelerating charging
If standard methods fail, you can try advanced tricks, but they require caution:
- 🔧 Engineering menu: type ##4636##, select Battery Information and check Charge Level and Temperature.°C, charging will be limited.
- 📲 Disabling optimization MIUI: In Settings → Special facilities → Application permissions turn off optimization MIUI critically.
- 🔄 Resetting battery settings: in Settings → Battery. → Three dots (menu) → Resetting. It could bring back factory charging algorithms.
⚠️ Warning: Changes to the settings in the engineering menu (#3644633##) can cause the phone to run in an unstable way.
Another way is custom kernel firmware (e.g. FrancoKernel or Kirisakura) that optimizes power management. However, this requires unlocking the bootloader and may be insecure. Read more about the firmware in our bootloader unlock guide on Xiaomi.
7.Fast charging myths: what really works and what doesn't
There are a lot of tips on the Internet to speed up charging, but not all of them are effective.
| Myth | Reality. | Explanation |
|---|---|---|
| Closing all applications speeds up charging | ⚠️ Partly true. | Closing heavy apps (games, navigators) helps, but closing messengers almost does not affect. |
| Charging in the off state faster | ✅ Right. | The phone does not waste energy on the OS, so it charges 10-15% faster. |
| Power Banking Speeds Up Charging | ❌ No. | Mobile batteries rarely support Quick Charge output, with a maximum of 10-12 watts. |
| Cooling the phone in the refrigerator speeds up charging | ❌ Dangerous! | A sudden temperature drop can damage the battery, better to charge at room temperature. |
| Disabling fast charging extends battery life | ✅ Right. | Constant fast charging increases battery wear and tear, and it is best to use it only when you need to charge urgently. |
If you want to maximize the life of the battery Redmi Note 8 Pro, follow these rules:
- 🔋 Charge your phone to 80-90%, not 100%.
- 🔌 Avoid full discharge (below 10%).
- 🌡️ Do not charge at temperatures below 0°C or higher than 40°C.