Fast charging on the Redmi Note 8 Pro does not work: all the reasons and solutions

Xiaomi Redmi Note 8 Pro is one of the most popular mid-range smartphones, but even it is not immune to charging problems. If your device suddenly stopped supporting fast charging, it does not always mean that the battery or power controller broke. In 70% of cases, the problem is solved by software settings or replacement of accessories. In this article, we will examine all possible causes, from the banal contamination of the connector to hidden MIUI settings that can block high current.

The Redmi Note 8 Pro features Quick Charge 3.0 (18W) support, but only when using an original or certified charger. If your smartphone charges slowly or shows a “Charge suspended” notification, don’t rush to bring it to the service. First check out the 10 key points, which we will discuss below.

1. Checking of charger and cable

The first thing to do is to rule out charging or cable malfunctions. Even if they look good, microcracks on the wires or wear of the contacts can reduce power. Xiaomi's original adapter for the Redmi Note 8 Pro will deliver 5V/3A, 9V/2A or 12V/1.5A depending on the mode. If your RAM only supports 5V/2A, there will be no fast charging.

How to check:

• 🔌 Connect the charger to another device (e.g., Redmi Note 9 or POCO X3). If there is no fast charging, the adapter is faulty.
• 📱 Try charging the Redmi Note 8 Pro from another power supply (preferably the original one).
• 🔍 Check the cable for inflections or meltings, and pay special attention to the area near the USB-Type C connector.
• 🔋 Use the Ampere app (available on Google Play) to measure the actual charging current. When charging fast, it should be at least 1,500–1,800 mA.

If you have a problem with your accessories, move on to the next step, and don't forget that cheap cables often don't support high currents because of the thin conductors inside.

2. Cleaning the USB-Type C connector and checking contacts

The USB-Type C connector in the Redmi Note 8 Pro eventually gets clogged with dust, villi, or oxidized, leading to poor contact and automatic power limitation by the safety system, to clean the connector:

1. Turn off your smartphone.
2. Take a wooden toothpick (not metal!) and carefully remove visible debris.
3. Moisten the cotton swab in isopropyl alcohol (90%+) and wipe the contacts inside the connector.
4. Let dry for 10-15 minutes before connecting the cable.

⚠️ Warning: Do not use compressed air (canisters) - this can damage the microphone or speaker near the connector. Also avoid wet wipes: they leave fibers.

After cleaning, try to plug in the charger. If the smartphone started charging faster, the problem was the pollution. If not, move on.

3. MIUI settings that block fast charging

MIUI has hidden power saving features that can limit charging current, such as Optimized Charging (in newer versions) or Battery Protection mode, which reduces charging speeds after 80% to extend battery life.

1. Go to Settings → Battery and Performance → Battery settings.
2. Find the option “Optimized charging” or “Battery protection” and turn it off.
3. In some firmware, you need to go to Settings → Special Features → Battery Optimization and Disable Restrictions for System Applications.

Also check if the Battery Savings mode is activated in the notification curtain. It automatically reduces the current consumed.

If after disabling all restrictions fast charging did not work, the problem may be in the firmware or hardware.

Checking the status of the battery

The battery in the Redmi Note 8 Pro (with a capacity of 4500 mAh) degrades over time, after 300-500 charging cycles, its real capacity decreases, and the power controller can artificially limit the current to prevent overheating.

1. Install the AccuBattery app (free on Google Play).
2. Charge your smartphone to 100% and see the actual capacity (should be close to 4500 mAh).
3. Check the battery health score if it's below 80%, the battery needs to be replaced.

⚠️ Warning: If the battery is swollen (visible on a raised screen or body), immediately disconnect the smartphone from charging and do not use it - it is dangerous.

Also, pay attention to the temperature of the smartphone while charging, if it heats up above 40°C, the controller automatically reduces the current.

• 🌡️ Charge your phone in a cool place (not under the sun or under the blanket).
• 📵 Do not play games or use resource-intensive applications while charging.
• 🔄 Remove the cover if it is dense and interferes with heat removal.

5. Resetting settings and firmware update

Sometimes the problem with fast charging is due to software failures in the firmware, it can be a bug of a particular version of MIUI or a conflict after the update.

1. Update your firmware: Go to Settings → About Phone → System Update. If an update is available, install it and restart your smartphone.

Reset the settings to factory:

• Make a backup copy of the data.
• Go to Settings → About the phone → Reset settings.
• Select “Reset all settings” (does not delete files) or “Delete all data” (complete reset).

If the reset started fast charging, the problem was the settings or cache of the system, and if not, it could be the power controller (discussed below).

Hardware malfunctions: power controller and motherboard

If all the previous steps didn’t work, the problem is probably hardware.Redmi Note 8 Pro responds to the following:

• 🔋 Power controller (machine chip on motherboard, responsible for current distribution).
• 🔌 USB Type C connector (may be physically damaged).
• 📱 Battery plume (connects the battery to the board).

Signs of hardware malfunction:

• The smartphone does not charge from any charge.
• Charging is only in the off state.
• The phone spontaneously shuts down when connected to the network.
• There is a smell of burning or smoke from the connector.

⚠️ Note: If you have no experience in electronics repair, do not try to solder or replace parts yourself. contact Xiaomi service center or checked repair. The cost of replacing the power controller for the Redmi Note 8 Pro is from 1500 to 3000 rubles (depending on the region).

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Before visiting the service, take a picture of your smartphone IMEI (printed on the box or visible in the settings in About Phone → General information).

7. Alternative methods of accelerating charging

If fast charging has not worked, but the smartphone still charges (albeit slowly), you can try to optimize the process:

• ⚡ Use the aircraft mode during charging - this will reduce the load on the processor and speed up the process.
• 🔄 Turn off Wi-Fi, Bluetooth and mobile data (or switch to mode) 2G).
• 📴 Close all background applications through Settings → Annexes → Launched.
• 🌙 Activate a dark theme (it reduces the power consumption of the screen).

You can also try charging your smartphone when it's off, which can sometimes give you 10 to 15 percent more speed, but it's not a substitute for full-blown fast charging.

8. When to contact the service

If you've tried all the ways, but the fast charging on the Redmi Note 8 Pro still doesn't work, only the diagnostics in the service.

• 🔧 After a fall or hit smartphone (possible damage to the board).
• 🔥 If the phone is warm or makes extraneous sounds when charging.
• 📉 The battery is discharged in a few hours (even without loading).
• ⚡ Charging comes only from a certain angle of the inserted cable.

The service should:

1. Check the power chain with a multimeter.
2. Test the charging controller.
3. Measure the actual capacity of the battery.
4. If necessary, replace the connector, plume or chip.

Average cost of repair:

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If the smartphone is warranty, don't disassemble it yourself! The warranty is canceled when the case is opened.

Now you know all the possible reasons why fast charging on the Xiaomi Redmi Note 8 Pro doesn’t work, and how to fix it. 90% of the time, it’s done by changing accessories or resetting your settings. If it doesn’t work, don’t delay your visit to the service to avoid more serious breakdowns.

FAQ: Frequent questions about charging Redmi Note 8 Pro