Fast charging on Xiaomi Redmi Note 8 Pro: how to turn on and fix problems

Xiaomi Redmi Note 8 Pro is one of the most popular smartphones of the brand, but many users are faced with the question: why their device charges slowly, although the characteristics stated support for fast charging 18W. In fact, the problem often lies not in hardware limitations, but in the wrong settings or use of unoriginal accessories.

In this article, we’ll take a look at how to check and enable fast charging on the Redmi Note 8 Pro, what parameters affect charging speed, and what to do if the smartphone stubbornly ignores the function despite all the manipulations. You’ll also learn which hidden MIUI settings can block fast charging and how to get around them without risking the battery.

Technical Charging Specifications of Redmi Note 8 Pro

Before you get to the settings, it’s important to understand what charging standards your device supports. Redmi Note 8 Pro is equipped with:

• 🔋 4500 mAh battery (typical capacity, real one may differ slightly).
• ⚡ Quick Charge 3.0 (up to now) 18W) — This is a key point, as not all chargers and cables are compatible with this standard.
• 🔌 portom USB Type-C, which should theoretically provide higher data transfer and charging speeds compared to Micro-USB.
• 📉 Power controller that automatically adjusts current depending on battery temperature and accessory condition.

However, in practice, many users are faced with the fact that the smartphone charges at 10W or even 5W, despite using the “right” charger.

• 🔌 Non-original cable or power supply (even if marked as "18W").
• 📱 Programmatic constraints MIUI (For example, energy saving mode or background optimization).
• 🔋 Battery wear (after 500 charging cycles, the controller can artificially limit current).
• 🌡️ Overheating of the device (at a temperature above 40)°C charging automatically slows down).

How to check if fast charging is on

Before you try to set something up, make sure the fast charging feature is really not active.

1. Connect your smartphone to the charger.
2. Unlock the screen and swipe down from the top edge to open the notification panel.
3. Note the charging icon: If the battery percentage shows the word “Fast Charge” (or “Quick Charge” on English firmware), the function works.
4. If there is no label, but the smartphone charges faster than usual (for example, from 20% to 50% in 30 minutes), it is possible that the indication is simply turned off in the settings.

You can also use third-party monitoring apps, such as Ampere (available on Google Play), which shows the current charging current in milliamps (mA).

• 🔋 1500–2000 mA – optimal range (corresponding to the ~18W).
• 🔌 1000–1200 mA – standard charging (10W).
• ⚡ 500-700 mA – Slow charging (5W), It is often found when using weak power supplies.

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If the Ampere is showing a current of less than 500 mA when the charger is connected, try clearing the USB port of dust with a wooden toothpick. Often the reason for slow charging is poor contact.

Step-by-step: how to turn on fast charging

If you're convinced that fast charging isn't working, follow this instruction, and let's start with the simplest steps and gradually move on to more complex settings.

1.Check the charger and cable

This is the most common cause of the problem. Redmi Note 8 Pro requires:

• 🔌 Power supply with Quick Charge 3.0 (or at least 2.0) power 18W.
• 📱 Cable. USB Type-C with high current support (preferably original or certified).

How to check:

Try charging your smartphone with the original power supply from Xiaomi (if any).

Use another Type-C cable (preferably short and thick).

Connect the charger to another Quick Charge device (such as another Xiaomi or Samsung smartphone).

Check if the cable is damaged (bending, bare wires).-->

If charging accelerated after the accessories were replaced, the problem was precisely in them: Xiaomi's original chargers for the Redmi Note 8 Pro are labeled as MDY-11-ED (18W).

2. Turn off the power saving mode

MIUI aggressively optimizes power consumption, which can block fast charging, to turn off the restrictions:

1. Go to Settings → Battery and performance.
2. Select Power Saving Mode.
3. Set the switch to the off position.
4. Also turn off Charging Optimization (if there is such a point).

3. Activate fast charging in hidden settings

In some versions of MIUI, the fast charging feature is hidden in the developer menu to enable it:

1. Activate Developer Mode: Go to Settings → About Phone and click on MIUI Version 7 times.
2. Return to the main settings menu and select Additional → For developers.
3. Find the option “Charge Limit” or “Fast Charging” (the name may vary).
4. Set the value on or without limitations.

4.Reset the battery settings

If the previous steps didn’t help, reset the battery statistics:

1. Go to Settings → Battery and performance.
2. Click on the three dots in the top right corner and select Reset Battery Settings.
3. Confirm the action.

After reset, plug in the charger and check the charging speed.

5. Update firmware

Older versions of MIUI had bugs that made fast charging work incorrectly.

1. Go to Settings → About the phone → System update.
2. Click Check Updates and install the latest version.

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If the fast charging stopped working after the upgrade, try to roll back on the previous version of MIUI. Sometimes new firmware introduces additional charging restrictions to "extend battery life."

Charger compatibility table

Not all power supplies, even those labeled Quick Charge, work equally well with the Redmi Note 8 Pro. Below is a table of compatibility for popular chargers:

If you're using a power bank, make sure it supports Quick Charge 3.0 in exit mode.Many external batteries limit power to 10W when charging smartphones.

Frequent Reasons Why Fast Charging Doesn't Work

Even if you've done everything according to the instructions, fast charging might not work, so let's look at the typical scenarios and their solutions.

1.The smartphone is getting hot.

Redmi Note 8 Pro automatically reduces the charging current if the battery temperature exceeds 40 ° C. This is protection against battery damage.

• 🌡️ Allow the device to cool (place in the shade or near the fan).
• 📵 Do not use your smartphone while charging (games, videos, navigation increase the heat).
• 🔋 Remove the cover - it can worsen the heat sink.

2. Battery wear and tear

After 300 to 500 charging cycles, the battery capacity decreases, and the power controller can limit the current.

1. Install the AccuBattery app from Google Play.
2. Charge your smartphone to 100% and discharge to 0% (calibration).
3. Check out the battery health setting in the app. If it's below 80%, the battery needs to be replaced.

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If the battery is below 70%, fast charging can be completely turned off by the controller, in which case only a replacement of the battery in the service center will help.

3. MIUI software limitations

In some regional firmware versions (e.g. India or China), fast charging may be software-enabled due to local safety standards.

• 📱 Install a global firmware (for example, MIUI Global via Fastboot.
• 🔧 Use it. ADB-The command for forced inclusion: adb shell settings put global fast_charge_forced_enable 1 Warning: This requires an unlocked bootloader and may lead to unstable work.

4.Problems with USB port

If a Type-C port is damaged or contaminated, the contact may be unstable.

• 🔌 Charging is interrupted with a slight movement of the cable.
• 📵 Smartphone determines connection / disconnection of charging for no reason.

Solution: Clean the port with compressed air or a soft brush, and if the problem persists, repairs are required.

Can you speed up the charging even more?

The maximum charging power for the Redmi Note 8 Pro is 18W, and it is not possible to exceed this limit hardware.

• 🔋 Turn off your smartphone while charging – this will speed up the process by 10-15%.
• 📵 Turn on the aircraft mode (disables communication modules, reducing heating).
• 🌡️ Charge at a temperature of 20-25°C is the optimal range for lithium-ion batteries.
• 🔌 Use short cable (up to 1 meter) – long cables increase resistance.

Some users try to modify the firmware to increase the charging current, but it is extremely dangerous:

⚠️ Warning: Forced charging current boosts through engineering menus or custom cores can cause the battery to bloat, overheat the power controller and even fire. Xiaomi sets limits for a reason - they are based on safety tests.

FAQ: Answers to Frequent Questions