Xiaomi Redmi 8A is a budget smartphone with a capacious battery of 5000 mAh, but many users are faced with the question: why does the device charge too long? The fact is that fast charging on this model is not activated by default, and its support depends on the version of the firmware, charger and even cable. In this article, we will discuss all ways to speed up charging, from basic settings to hidden MIUI functions.
It’s important to understand that the Redmi 8A officially supports Quick Charge 3.0, but only if you meet a number of conditions. If you connect your smartphone to a standard charger from a kit (5V/2A), the maximum power will be only 10 watts. To unlock the fast charging potential, you will need not only the right hardware, but also the correct software settings. Next are step-by-step instructions with explanations for each step.
1. Check support for fast charging on Redmi 8A
Before you try to enable accelerated charging, make sure your device supports it. Redmi 8A came in several versions, and not all of them are equipped with the necessary hardware.
- 🔍 Smartphone Model: Go to Settings → The phone. → Model, if the Redmi version is specified 8A Pro or Redmi 8A Dual - Quick Charge 3.0 support guaranteed.Regular Redmi 8A (without prefixes, may require additional manipulation.
- 📱 Version. MIUI: Firmware updates often add support for new features. Check the relevance of the software in Settings → The phone. → System Update: Minimum version for stable fast charging — MIUI 11 and above.
- ⚡ Hardware check: Connect your smartphone to a Quick Charge 3.0 charger (such as the original Xiaomi Mi 9 or the original one). POCO F1). If the lock screen appears the inscription “Fast Charging” – the function works.
If a high-power charger fails to display a fast charger, the problem may lie in the cable or USB port. Try using a certified high-current USB Type-C cable (e.g., from the Xiaomi Mi 10 kit).
2. setting up fast charging in MIUI
Even if the hardware supports Quick Charge, some versions of MIUI may have the function disabled software, so you can use the following steps to activate it:
- Open Settings → Battery and Performance.
- Go to Charge (in some versions of MIUI, the item may be called Charging Settings).
- Find the option Quick Charge or Quick Charge and turn it on.
- If you don't have an option, try turning on Performance Mode in the same menu, which can indirectly speed up charging.
Important: On some firmware, the fast charging option is hidden and requires activation via the engineering menu. To do this, type ##4636## in the Phone app, go to Battery Information and select Quick Charging (if available).
Update MIUI to the latest version
Use the original USB Type-C cable
Connect the charger with Quick Charge 3.0 support
Check the USB port for contamination
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Selection of charger and cable
One of the key factors affecting charging speed is the power of the charger. Redmi 8A supports Quick Charge 3.0, but only when using compatible accessories.
| Type of charger | Max. Power. | Support for QC 3.0 | Example of model |
|---|---|---|---|
| Standard (from the kit) | 10 W (5V/2A) | ❌ No. | Xiaomi 5V2A |
| Quick Charge 3.0 | 18 W (9B/2A) | ✅ Yes. | Xiaomi Mi 18W |
| Power Delivery (PD) | 20+ Watt | ⚠️ Partially. | Anker PowerPort III |
| Wireless (Qi) | 10 Watts. | ❌ No. | Xiaomi Wireless Charger |
For maximum charging speed, use original Xiaomi chargers labeled Quick Charge 3.0 (e.g., from the Mi 9, POCO F1 or Redmi Note 8 Pro kit), and certified accessories from Anker, Belkin or Aukey with similar specs will also work.
⚠️ Note: Using uncertified chargers with a declared power of more than 18W may overheat the battery and shorten its lifespan. 8A It does not support Quick Charge 4 technology+ Power Delivery 3.0, so chargers with 30 power+ Watts will not increase speed, but will increase heating.
4. Optimization of settings for accelerated charging
Even with the right charger, the charging speed can be slowed due to background processes or system limitations to maximize efficiency:
- 🔋 Turn off background apps: Go to Settings → Annexes → Autostart and disable autostart for unnecessary programs.This will reduce the load on the processor while charging.
- ❄️ Control the temperature: If the smartphone is heated above 40°C, the system automatically reduces the charging current. Remove the case and avoid direct sunlight.
- 📴 Activate Airplane Mode: This will turn off Wi-Fi, Bluetooth and cellular, reducing power consumption. Turns on in the notification curtain or through Settings → SIM-maps and mobile networks.
- 🔄 Resetting battery settings: If charging suddenly slows down, reset battery statistics in Settings → Battery → ⋮ → Resetting battery settings.
Another useful trick is to disable MIUI optimization for applications that actively use the Internet in the background (for example, instant messengers).
- Open Settings → Applications → Application Management.
- Select the application you want (such as Telegram).
- Press Battery Limits and select No Limits.
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If your smartphone charges slowly when the screen is on, activate Do Not Disturb (Settings → Sounds and Vibrations → Do Not Disturb) mode, which will turn off notifications and animations, reducing the load on the processor.
5. Solving problems with fast charging
If the Redmi 8A is still charging slowly after all the manipulations, check the following points:
- 🔌 Port port USB: Check the connector for damage or oxidation, and clean it carefully with a wooden toothpick (not a metal object) if necessary!).
- 📉 Battery wear: If the battery is used more 2 For years, its capacity could have decreased by 30-40%. Check the status in the AccuBattery app (available on Google Play).
- 🔄 Reset to factory settings: In rare cases, software errors block fast charging. Before reset, back up your data to Settings → Additionally. → Backup and reset.
- 🛠️ Fastboot Firmware: If the problem occurs after the update, try reflashing the device via the Mi Flash Tool (instructions on the official Xiaomi forum).
⚠️ Warning: If the charger is connected, the smartphone does not detect it or gives an error "Charging is suspended", the problem may be in the power controller. In this case, a diagnosis is required in the service center - self-repair can damage the motherboard.
What to do if the smartphone does not turn on after discharge?
6. Alternative methods of accelerating charging
If standard methods don’t help, consider additional options:
- 🔄 Using Charging Mode from the Switched-off State: Some users note that Redmi 8A It charges faster if you start the process when the device is turned off. 3.0. Wait for the charging indication to appear (usually through 5-10 seconds).
Monitoring applications
AccuBattery
GSam Battery Monitor
Quick Charge 3.0
Modified firmware
MIUI
xiaomi.eu
Important: Avoid using third-party “fast charging” features (such as Samsung Adaptive Fast Charging or OnePlus Dash Charge).These technologies are incompatible with Quick Charge 3.0 and can damage the power controller.
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The maximum charging speed of the Redmi 8A is achieved while meeting three conditions: MIUI 11+ firmware, Quick Charge 3.0 (18W) charger and the original USB Type-C cable.
7. Myths and misconceptions about fast charging
There are many myths surrounding Quick Charge technology, and we'll look at some of the most common ones.
- ❌ «Fast charging spoils the battery: modern batteries Redmi 8A They have a controller that limits current at high temperatures, and when used correctly (without overheating), the battery life is reduced slightly.
- ❌ «Any powerful charger can be used": Power Delivery-enabled chargers (such as MacBooks) are not always compatible with Quick Charge 3.0. They may not give you any speed gain or even charge more slowly.
- ❌ «Wireless charging faster: Maximum wireless charging power for Redmi 8A — 10 Wh-what-in 1.5-2 slower than Quick Charge 3.0.
- ❌ «We need to discharge the battery to 0%»: Xiaomi's Lithium Polymer Batteries Have No "Memory Effect" Optimum Charging Range — 20-80% prolongation.