Xiaomi Redmi 8 Pro does not charge: full instructions for diagnosis and repair

Why Xiaomi Redmi 8 Pro has stopped charging and what to do about it

You plugged your smartphone into charging, but you don't have a battery icon on your screen, and the battery count doesn't go up, or the phone doesn't respond to the cable at all? The problem with charging the Redmi 8 Pro is one of the most common problems, but 80 percent of the time, you can fix it yourself without going to the service center, and the main thing is to diagnose the cause correctly.

This model, released in 2019, has a 4,500 mAh battery and supports fast 18W charging. However, over time, contacts become oxidized, connectors wear out, and software failures interfere with normal operation. In this article, we will analyze all possible causes - from banal contamination of the USB-C port to serious hardware breakdowns, and also give a checklist for self-diagnosis.

Before you carry your phone for repair, check out 10 key points – it’s possible the problem is solved in 5 minutes!

1. Checking of charger and cable

Start with the simplest one: 9 out of 10 malfunctions are related to a cable or power adapter. Even if you use the original Xiaomi kit, the wires inside the cable are wiped over time, and the contacts in the USB-C connector become oxidized.

What to do:

• 🔌 Connect your phone to another charger (preferably the original one with Quick Charge 3.0 support).
• 🔄 Try charging another phone or device (like the Redmi Note 8 Pro) with your adapter – if it doesn’t charge, the power supply is a problem.
• 🔍 Carefully inspect the cable for bending, insulation ruptures or blackened areas (a sign of short circuiting).
• 📱 Connect your phone to your computer or power bank – if charging is going, it’s the adapter’s fault.

Note the power supply. Redmi 8 Pro requires an adapter with 5V/3A, 9V/2A or 12V/1.5A. If you use a non-original charge with less power (e.g., 5V/1A), the phone may charge extremely slowly or not respond at all.

⚠️ Never use cheap cables without certification. USB-IF. They can damage the smartphone's power controller, leading to a complete charging failure. Xiaomi's original cables are labeled MDY-11-ED or MDY-11-EE.

2.Diagnostics of USB-C port: cleaning and inspection

The USB-C connector in the Redmi 8 Pro is one of the most vulnerable places. Over time, dust gets in, pile from pockets, and contacts oxidize from moisture. If the phone is not charging, but when you connect to a PC it is defined as a device, the problem is in the port.

How to clean the connector:

1. Turn off the phone and remove it. SIM-map.
2. Take a toothpick or plastic spatula (not metal!) and carefully remove visible debris.
3. Soak the cotton swab in isopropyl alcohol (90%+) and wipe the contacts. Don't use water!
4. Let the port dry for 10-15 minutes.

If after cleaning the charging did not go, examine the connector for mechanical damage:

• 🔍 Contorted contacts are a sign of careless cable connection.
• 💥 Carbonated or melted areas - a consequence of short circuit.
• 💧 Corrosion (green coating) - oxidation from moisture.

In case of serious damage, the connector will need to be replaced, the average cost of repairs in service centers is from 1200 to 2500 rubles (2026), self-replacement is possible, but requires soldering skills and special equipment.

3. Software failures: resetting settings and test mode

Sometimes the Redmi 8 Pro doesn't charge due to a firmware failure or application conflict, for example, after the MIUI update, the battery controller settings may fly off. To rule out the software cause, follow the following steps:

Step 1: Restart in Safe Mode

• Press the power button before the menu appears.
• Press and hold the item "Switch off (or turn off power)."
• Confirm the transition to Safe Mode.

If the safe charging mode is running, the problem is in one of the installed applications. Uninstall the recently added programs.

Step 2 Resetting to factory settings

This is an extreme measure, but it helps in 30% of software failures.Be sure to back up through Settings → About Phone → Backup before resetting.

Settings → System → Additional → Resetting settings → Erase all data

Step 3: Testing in test mode

Redmi 8 Pro has a hidden Engineering Mode where you can test the hardware to get there.

Dial in the dialer: ##4636##


Select Battery Information

If the Charging section is Not charging, and the charge level does not change - the problem is precisely in the hardware.

Restart your phone in safe mode

Check charging without connected applications

Reset network settings (Settings) → SIM-maps and mobile networks → Resetting settings)

Update MIUI to the latest version

Complete reset (if other methods do not help)-->

4. Problems with the battery: how to check its condition

The average battery life of the Redmi 8 Pro is 2-3 years (or ~500 full charge cycles), after which the capacity drops, and the controller can block charging due to overheating or deep discharge.

Signs of a faulty battery:

• 🔋 The phone turns off at 20-30% charge.
• 🔥 The body is very hot in the battery area.
• ⚡ The swelling is then turned off (and then turned off).
• 🕒 Autonomous work time decreased by 2-3 times.

How to check the status of the battery:

1. Install the AccuBattery app (available on Google Play).
2. Charge your phone to 100% and see the actual capacity (should be close to 4500 mAh).
3. If the capacity fell below 3000 mAh - it's time to change the battery.

The cost of replacing the battery in the service is from 1500 to 3000 rubles (depending on the quality of the battery).The original battery has the article MB11 or BM4H. When replacing yourself, be sure to use thermal glue to fix the new battery.

⚠️ Attention, if the battery is swelling, you can't keep using the phone, it can cause a fire or an explosion, turn off the device immediately and call the service.

5. Problems with the power controller and motherboard

If all previous methods failed, the problem could be a charging controller (BQ25890 chip or similar) or a track damage on the motherboard, one of the most difficult problems, as it requires soldering under a microscope.

Symptoms of Controller Failure:

• 🔌 The phone does not respond to any charger.
• 🔄 Charging occurs only at a certain position of the cable.
• 💥 When connected to the network, the phone is turned off.
• 📉 The battery is drained even with the adapter connected.

What you can do on your own:

• Try charging your phone wirelessly (if supported). the Redmi 8 Pro doesn't have built-in wireless charging, but you can use a Qi receiver (connects to a USB-C port).
• Connect your phone to your PC and see if it's defined as a device, and if so, there's a problem with the power chain.

In the service center, the cost of a diagnostic board is 500-1000 rubles, and repairs (replacement of the controller or soldering of tracks) - from 3000 to 8000 rubles, depending on the complexity.

💡

If the phone doesn't turn on at all, try Test Point resuscitation, which requires you to close special contacts on the board and connect the charger, but this method requires disassembling the device and is only suitable for advanced users.

External factors: moisture, overheating, mechanical damage

Xiaomi Redmi 8 Pro does not have official IP68 protection, so moisture is a common cause of charging problems. Even if the phone is not sinking, condensation or high humidity can cause contacts to corrosion.

What to do if your phone is wet:

1. Turn it off the charge immediately.
2. Extract. SIM-memory-card.
3. Place the device in a silica gel (or rice) bag for 24 to 48 hours.
4. Do not turn on your phone until it is completely dry!

Other external causes:

• 🌡️ Overheating (for example, if the phone was lying in the sun) The controller blocks charging at temperatures above 45°C.
• 💥 Strikes or falls, even if the body is intact, the plumes could have moved or the boards cracked.
• ⚡ Power surges in the network. Use a network filter or stabilizer.

If your phone overheats while charging, try:

• Take off the case.
• Charge in a cool room.
• Use an adapter with less power (e.g. 5V/2A instead of 9V/2A).

💡

If the Redmi 8 Pro does not charge after a fall or impact, most likely, the motherboard is damaged or the battery plume disconnected, in which case self-repair is almost impossible - diagnostics are required in the service.

7. Alternative charging methods if the standard one does not work

If the USB-C port is damaged and it is not possible to replace it temporarily, you can use alternative methods:

Method 1. Wireless charging

Although the Redmi 8 Pro doesn’t support Qi out of the box, you can buy a wireless charging receiver (cost ~500 rubles) that connects to a USB-C port and allows you to charge your phone in an induction way.

Method 2. Charging through OTG-hub

If the contacts in the connector are damaged, but the USB-C is still partially working, try connecting charging via a USB hub with an external port.

Method 3: Direct connection to the battery

This method is only suitable for experienced users!

1. Disassemble the phone and disconnect the battery plume.
2. Connect the laboratory power supply (with a current restriction of 1-2A) to the contacts of the battery.
3. Charge the battery to 3.8-4.0V.

⚠️ Dangerous! Incorrect connection can lead to fire.

8.When to contact the service: the price of repair in 2026

If independent methods did not help, you will have to carry the phone for repairs. Here are the approximate prices for services for Xiaomi Redmi 8 Pro (currently for 2026):

Where to repair it:

• 🏢 Xiaomi service centers – 6-12 months warranty, but more expensive.
• 🔧 Local workshops are cheaper, but the risk of poor repairs is higher.
• 🛠️ Independently – only if you have experience of soldering and tools.

Before you give the phone for repair:

• Make a backup copy of the data (if the phone is still turned on).
• Check if they give you a job guarantee.
• Check out the reviews of the workshop.

⚠️ Attention! Some services offer "cheap" repairs using used parts or fakes. Original parts for the Redmi 8 Pro are Xiaomi-marked and hologram!

FAQ: Frequent questions about charging Xiaomi Redmi 8 Pro