Why Xiaomi or Redmi does not charge from a proper charging: all the reasons and solutions

Introduction: why the smartphone does not respond to charging

You plugged a Xiaomi Redmi into a charger, but the battery light doesn't light up, and the charge percentage doesn't go up -- or worse, the phone doesn't show any signs of life at all, and it's 100% good charging (checked on another device), the cable is intact, the socket is working. What's the matter?

The charging problem in Xiaomi and Redmi smartphones is one of the most common after a broken screen. According to service centers, 37% of cases with such a malfunction are solved without replacing components — just cleaning contacts or resetting the settings. The remaining 63% require a deeper diagnosis, from replacing the connector to repairing the board.

In this article, we’ll look at all the possible reasons why Xiaomi or Redmi doesn’t charge properly, from the trivial (polluted port) to the complex (power controller failure), and give step-by-step instructions on how to diagnose and fix the problem yourself.

1. Contaminated or damaged USB-C/MicroUSB connector

The most common cause is dust, pile or oxidation of contacts in the charging socket, and over time, debris is stuffed into the connector, which prevents close contact with the cable, especially for the Redmi Note 8/9/10 and POCO X3 models, where the port is not protected from moisture.

How to check:

• 🔦 Illuminate the connector with a flashlight - if you see debris, pile or corrosion (green / white plaque), the problem is found.
• 📱 Try to shake the cable slightly in the connector: if charging appears, then disappears, the contacts do not fit tightly.
• 🔌 Connect another cable - if the situation does not change, it is the fault of the connector itself.

How to clean:

1. Turn off the phone and remove it. SIM-map (if you disassemble the device).
2. Take a toothpick made of wood (not metal!) or a plastic shoulder blade to clean your ears.
3. Carefully remove debris from the connector, moving parallel to the contacts (not deep!).
4. For oxidized contacts, use alcohol (90%+) and a cotton swab.

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Do not use compressed air (canister) to clean the connector – this can drive the garbage deeper or damage the chips on the board.

⚠️ Warning: If the contacts are still not shiny or have black soda after cleaning, this is a sign of overheating or short circuit.

2. Damaged cable or incompatible charging

Even if the charger works with other phones, it does not guarantee compatibility with Xiaomi/Redmi.The fact that smartphones of this brand often require specific fast charging protocols (for example, Quick Charge 3.0/4+ or MI Fast Charge).

Signs of incompatibility:

• 🐢 The phone charges very slowly (0.1-0.5% per minute).
• ⚡ The screen will display a “Slow Charging” or “Use the Original Adapter” notification».
• 🔄 Charging is turned on and off (especially when the cable is moving).

What to do:

• 🔌 Use the original Xiaomi cable and adapter (or certified Quick Charge-enabled analogue).
• 🔍 Check the cable for faults or insulation damage – even a small crack can interrupt charging.
• 📊 In the battery menu (Settings) → Battery) see the current charging power. 5W — cable or adapter is not suitable.

3. Software failure (software)

Sometimes the phone doesn't charge because of firmware glitches, especially after updating MIUI or installing custom firmware.

• 📱 The phone is turned on, but the percentage of charge does not change for hours.
• 🔄 When connecting the charging, the battery icon appears, but after a second disappears.
• 🤖 In system logs (Settings) → The phone. → Version. MIUI → Click 5 times on "Core" and there are errors such as usb: disconnect or battery: charging paused.

Solutions:

1. Safe Mode Reboot: Press the power button before the menu appears. Press and hold "Stop" until the prompt to switch to Safe Mode appears. Connect charging - if the phone starts charging, third-party software is to blame.
2. Recovery Cache Reset: 1. Turn off the phone. 2. Press <power button> + <volume up> until the Mi. 3 logo appears. Select "Wipe & Reset" → "Wipe Cache." 4. Reboot.
3. Related: Retreat of the update MIUI (If the problem occurred after the update: Settings → The phone. → Updating the system → ⚙️ → Remove the latest update

4. Battery malfunction

Xiaomi/Redmi batteries are designed for 500-800 charging cycles, after which their capacity drops by 20-30%. If the phone is older than 2-3 years, there is a risk that the battery will swell or lose the ability to hold a charge.

Signs of a worn-out battery:

• 🔋 The phone discharges in 2-3 hours without load.
• 🌡️ The battery is swelling (check if the phone is on the table).
• ⚡ Charging is only off or interrupted by 80-90%.
• 📉 Settings menu → Battery → The state of the container shows less than 80% of the original.

How to check:

1. Download the AccuBattery (Play Market) app and run a battery health test.
2. Look at Settings → About phone → Battery status – if it says “Replace the battery”, further diagnosis is meaningless.
3. Turn off your phone and try charging – if charging is going on, and in the on state is not, the software or controller is to blame.

⚠️ Warning: If the battery is swelling, stop using the phone immediately! The risk of fire or explosion when charging is extremely high.

Bloating of the hull|Spontaneous shutdowns at 20-30% charge|Charging only when off|Heating the battery without loading|Capacity < 70% of the original-->

5. Problems with the power controller or motherboard

If all the previous steps didn't work, the problem is the hardware, the charging controller is damaged, the fuse is burned, or the board is damaged, and these are the most difficult and expensive to repair faults.

Symptoms:

• 💥 The phone does not charge from any charge, but it is powered by Power Bank.
• 🔥 Port port USB Heated to an unacceptable temperature (more than 60).°C).
• 🛠️ After falling or getting moisture, the charging disappeared suddenly.
• 📵 The phone does not determine the cable connection at all (no sound/vibration).

What you can do on your own:

• 🔧 Check the charging fuse (if you have soldering experience). On Xiaomi boards, it is usually marked as F1 or FUSE and is located next to the connector USB.
• 🔍 Check the fee for darkening, chipping or staining (signs of overheating or corrosion).
• 📱 Connect your phone to your PC – if it is identified as an unknown device, the problem is in the controller. USB.

In other cases, professional diagnostics are required, the average cost of repair:

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If the phone stopped charging after a fall, moisture or a power surge, there is a 90% chance the board is damaged. SMD-components are not possible.

6. Effect of moisture and corrosion

Even if your Xiaomi/Redmi hasn’t drowned in water, high humidity (such as in the bathroom or kitchen) can cause contacts to oxidize, which over time causes the charging circuit to break.

How do you determine:

• 💧 White/green spots (oxidized) are visible on the board or connector).
• 🌧️ The phone stopped charging after staying in a damp room.
• 🔌 Charging only works in a certain position of the cable.

What to do:

1. Turn off the phone and remove the battery (if possible).
2. Wash the connector and board with isopropyl alcohol (90%+) with a brush.
3. Dry your phone in rice or silica gel for at least 24 hours.
4. If the corrosion is deep, contact the service for ultrasonic cleaning of the board.

⚠️ Warning: Do not use a dryer - hot air can damage the screen or battery.Optimum drying temperature: 20-25°C.

7. Software restrictions (for example, after firmware)

If you’ve been flashing your phone recently (especially custom firmware like LineageOS or Pixel Experience), the problem may be incorrect kernel settings or the lack of charging drivers.

Signs:

• 📱 The phone is charged only when it is off.
• ⚡ The lock screen displays “Not original charging” even with a native adapter.
• 🔧 B Settings → For developers, the option “Debugging by” USB» idle.

Decisions:

• 🔄 Back on the stock firmware. MIUI via Mi Flash Tool.
• 📝 In the build.prop file, check the lines: ro.charger.enable=true persist.charger.enable=1 If none are available, add.
• 🔌 Install Magisk with a charging patch (e.g. Quick Charge Enabler).

Frequent Questions (FAQ)