How to enable fast charging on Xiaomi Redmi 8A: all the ways and nuances

Xiaomi Redmi 8A is one of the most popular budget smartphones of the brand, but many users are faced with the question: why their device charges so slowly? the fact that fast charging on this model is not activated by default, and in some cases requires additional settings or even replacement of components. In this article, we will discuss all possible ways to speed up charging, from basic to advanced, and explain why even after all the manipulations, the speed can remain low.

It is important to understand that Redmi 8A Supports Quick Charge technology 3.0, But with limitations, the manufacturer saves on trim, so there's often a regular adapter in the box. 5V/2And (10The watt, which doesn't unlock the potential of a smartphone, and we'll tell you what accessories you really need, how to check compatibility, and what to do if your phone doesn't see fast charging. MIUI, which may influence the process.

1. Check support for fast charging on Redmi 8A

Before you try to enable fast charging, make sure your device supports it. Xiaomi Redmi 8A (model M1908C3IG) is equipped with a controller compatible with Quick Charge 3.0, but there are nuances:

• 🔌 Hardware support: Qualcomm Snapdragon 439 chipset technically supports QC 3.0, but the manufacturer can limit the power program.
• ⚡ Maximum power: Real charging speeds rarely exceed 10–12W (instead of the claimed 18W), even with a compatible adapter.
• 📦 Complete adapter: In the box goes the charger on 5V/2And (10W) which does not provide accelerated charging.

To check the current charging speed:

1. Connect your smartphone to charging.
2. Open the Security app → Battery.
3. Click on the icon «⚡» in the upper right corner – the current power (for example, 10W or 5W) will be displayed).

⚠️ Note: If the menu displays power below 10W, the problem may be in the cable, adapter or energy saving settings!

2 What accessories are needed for fast charging

Even if your smartphone supports Quick Charge 3.0, without the right accessories, fast charging won’t work.

Important: Even if you use a QC 3.0 adapter, but the cable does not support high current, the charging speed will remain at 5-10W. Xiaomi’s original cables are usually labeled as 5A (amperes) – this is a good sign.

How to check the cable:

• 🔍 Check the connectors for damage or oxidation.
• 📱 Connect to another device with QC 3.0 (e.g. Redmi Note 9) – if charging is fast, the cable is serviceable.
• 🛒 When buying a new cable, choose models with labeling USB 2.0 High-speed or USB 3.1.

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If you frequently charge your smartphone from a laptop or power bank, use a ferrite ring cable to reduce interference and improve the stability of power transmission.

3. Step-by-step instruction: how to turn on fast charging

If you already have compatible accessories, follow this instruction:

1. Turn off your smartphone and connect it to the charger.
2. Hold the power button for 10-15 seconds until the MI logo appears (this will reset the system’s time constraints).
3. Turn on the device and check the charging power in the battery menu (see section 1).

If the speed has not changed, make additional adjustments:

Turn off power saving mode | Check cable and adapter for compatibility | Clear USB connector from dust |Reboot smartphone-->

1. Go to Settings → Battery and Performance → Power Saving Mode and turn off all restrictions.
2. Turn on Settings → Additional → Developers → USB debugging (this sometimes helps stabilize charging).
3. If you use a non-original adapter, try to turn on compatibility mode: connect the charger, then restart the phone.

⚠️ Attention: Some firmware MIUI (Especially custom ones can block fast charging for uncertified accessories. If after all the manipulations the power does not exceed 10W, try updating the software or resetting to factory settings.

4.Why fast charging might not work

Even with the right accessories and settings, Quick Charge sometimes refuses to activate.

• 🔋 Worn battery: After 300-500 charging cycles, the battery loses its ability to receive high current. → Battery. → Status.
• 📉 Software restrictions: In some regions (e.g. EU), Xiaomi artificially reduces charging power due to safety regulations.
• 🔌 Faulty Power Controller: If the smartphone overheats or turns off when charging, it may indicate a hardware breakdown.
• 📱 Castom firmware: Unofficial versions MIUI Android often breaks support QC 3.0.

How to diagnose the problem:

1. Try charging your smartphone from another adapter (like the Redmi Note 10).
2. Check the temperature of the case – if it heats above 40°C, the system will automatically reduce power.
3. Install the AccuBattery app (from Google Play) for detailed diagnosis.

5. Optimizing charging: how to extend the life of the battery

Even if you've managed to activate fast charging, overusing it reduces battery life.

• 🔄 Avoid full discharge: Connect charging at 20–30% and turn off 80–90%.
• 🌡️ Control the temperature: Do not charge your smartphone in the sun or near heat sources.
• ⚡ Use original accessories: Cheap cables and adapters can damage the power controller.
• 📵 Turn off power-intensive functions during charging (games, navigation, video).

MIUI has a hidden optimised charging feature that limits the charge to 80% to extend battery life.

1. Go to Settings → Battery → Battery settings.
2. Activate the option Optimized Charging (could be called Adaptive Charging in newer versions).

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Regular use of fast charging reduces battery life 15-20% faster than standard charging.If you plan to use a smartphone longer than 2 years, limit QC to critical cases.

6. Alternative methods of accelerating charging

If Quick Charge 3.0 never worked, try these methods:

• 🔌 Use Power Delivery (PD): Some adapters (such as MacBook) support PD And they can give you up to 15 watts on the Redmi. 8A.
• 🔄 Turn on Air Mode: Shutting down network and background processes speeds up charging by 10-15%.
• 📱 Update the firmware: In new versions MIUI Sometimes correcting errors with charging.

To use Power Delivery:

1. Buy an adapter with PD support (e.g. Xiaomi MDY-12-EE 20W).
2. Connect your smartphone – the system will automatically select the maximum possible power.

⚠️ Note: Not all adapters PD compatible with Redmi 8A. Before buying, check the manufacturer's reviews or specifications. for example, adapters from Samsung (EP-TA800) They may not work properly.

7. Frequent mistakes and how to avoid them

Many users make mistakes that prevent fast charging from working properly.

Another common problem is that fast charging is false, and for example, an adapter might be 18W, but the real speed is still 10W, and that's because of:

• 🔌 Improper protocol recognition (adapter gives 9V, but the phone takes only 5V).
• 📱 Firmware restrictions (in some regions, Xiaomi blocks) QC 3.0).

To check the real speed, use the Ampere app (showing current in milliamperes). Normal values for QC 3.0: 1500–2000 mA.

FAQ: Answers to Frequent Questions