Xiaomi phone shows charging but doesn't charge - what to do?

You plugged a Xiaomi Redmi, POCO or Mi into a charger, a charging animation appeared on the screen, but the battery percentage is not growing - or even falling? This problem occurs in 12% of Xiaomi smartphone owners (according to service centers 2023-2026) and is most often associated with a power controller malfunction, cable damage or firmware failure. 30% of cases are to blame for the battery itself, which lost capacity after 500+ charging cycles.

In this article, we’ll look at all possible causes, from simple connector contamination to serious hardware breakdowns, and give step-by-step instructions on how to diagnose and fix the problem yourself. If the Xiaomi phone is still warranty, some methods (such as factory resetting) can cancel it — consider this before you start repairing it.

1. Checking the charger and cable - where to start the diagnosis

The first thing to do is to eliminate the charger failure, and even Xiaomi’s original cables wear out over time, rubbing their veins, oxidizing their contacts, and the power supply may be under-voltage, and statistics show that 40 percent of false charging is associated with accessories.

Here’s how to check their performance:

• 🔌 Use a different cable and power supply. Best of all, the original Xiaomi Quick Charge-enabled one. 3.0/4+ (For Redmi Note models 10 Pro, POCO X3 If the charging started, the problem is in the old kit.
• 📱 Connect your phone to another device (laptop, power bank, other smartphone in mode) OTG). If charging is going - the power supply is to blame.
• 🔍 Check the cable for physical damage: bending at the base, bare wires, melted areas, especially vulnerable areas near the connectors. USB-C.
• 📊 Check the output voltage of the power supply unit with a multimeter (should be 5V/9V/12V If the voltage is lower, depending on the model. 4.5V — block.

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If you don't have a multimeter, try charging your phone from another PD-enabled device (Power Delivery), such as a MacBook or a modern iPad, which gives you a stable voltage.

If you have a problem after you change the cable and the power supply, move on to the next step, but first make sure you use a fast-charging cable: some cheap ones can only transmit data, but not power.

2. Clean USB-C connector – eliminate oxidation and pollution

The USB-C connector in Xiaomi smartphones is often clogged with dust, villi from your pocket, or oxidized by moisture, leading to unstable contact: the phone recognizes the charging connection (hence the animation), but no current is fed to the battery.

How to clean the connector yourself:

1. Turn off the phone and remove it. SIM-card/memory card (if any).
2. Take a toothpick or plastic spatula (not metal!) and carefully remove visible contaminants from the connector. Move parallel to the contacts so as not to bend them.
3. Soak the cotton swab in isopropyl alcohol (90%+) and wipe the contacts. Don't use water or wet wipes!
4. Let the connector dry for 10-15 minutes, then try charging the phone.

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

• 🔍 Bending contacts (often after a phone drop).
• 💧 Traces of corrosion (green or white plaque - a sign of oxidation).
• 🔥 Burned areas (black dots - a signal of short circuit).

3. Battery Diagnosis: How to Check Battery Wear

The average battery life of Xiaomi smartphones is 2-3 years (or 500-800 charge cycles), after which the capacity drops by 30-50%, and the phone can show charging, but not storing energy, for example, the percentage of the battery is standing still or even decreases during connection to the network.

How to check the status of the battery:

Check battery life (if the phone is discharged in 2-3 hours – the battery is worn out)

Install the AccuBattery app (showing real capacity and wear)

Run the test in the engineering menu: dial ##4636## → Information about the battery

Look at the physical condition of the battery (swelling, deformation)

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If the battery capacity in AccuBattery is less than 80% of the factory capacity, it is time to change it. A bloated battery is dangerous: it can ignite when charging! If the phone body is deformed (the screen is "up"), immediately disconnect the device from the network and do not use it until the battery is replaced.

4. Setting reset and firmware: software causes of the problem

Sometimes Xiaomi phone doesn't charge due to a firmware failure or system process conflict, which can happen after a MIUI update, custom firmware installation, or even a virus.

• The phone shows charging, but the battery percentage decreases.
• Charging is only available in Fastboot or Recovery.
• After the cable is turned off, the phone immediately turns off, despite the "100% charge".

What can be done:

1. Reset to factory settings (without data loss if possible): Settings → About phone → Reset settings → Reset network settings If it doesn’t help – a complete reset (with data loss).
2. Update MIUI via Settings → Update system. Sometimes bugs are fixed in newer versions of firmware.
3. Fastboot flashing (for power users) download the official firmware from en.miui.com and use the Mi Flash Tool.

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If the phone doesn’t turn on but is responding to charging (vibrates, lights up), try going to Recovery (press Power + Volume up) and make a Wipe Cache Partition.

If you have a problem after the reset, and the phone is still under warranty, contact the service center.

5. Checking the power controller - when you need a soldering station

A power controller (or PMIC) is a chip on a motherboard that regulates charging and power distribution. If it fails, the phone can:

• Show charging, but not accumulating energy.
• Charge only when turned off.
• Make the error "Unoriginal cable" even with the original accessory.

Causes of Controller Failure:

• ⚡ Voltage jump (for example, when charging from a faulty power supply unit).
• 💦 Moisture on the board.
• 🔥 Overheating due to prolonged play or exercise.

Diagnosing a controller malfunction at home is difficult, you need a multimeter and a circuit board.

• The phone does not detect any chargers (even the original ones).
• When you connect to a PC, the phone is not recognized (no connection sound).
• The battery is discharged in a few minutes, even if it is 100%.

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If you suspect a controller malfunction, try connecting your phone to charge in Fastboot (press Power + Volume Down when you turn it off). If charging is happening, the problem is exactly PMIC.

Repairing the power controller requires soldering the chip or replacing the entire board, a complex procedure that is best entrusted to professionals, the cost of repair is from 2 000 to 8 000 rubles depending on the model.

Mechanical damage: falls, water, impacts

If the Xiaomi phone fell, got wet, or was subjected to severe vibrations (such as in the car), the charging problem may be related to mechanical damage.

• 💥 Battery contact dump (after impact).
• 🌊 Corrosion of the board (after water hit).
• 🔌 Connector damage USB-C (lopsided).

What to do:

1. Examine the case for cracks, dents, or traces of moisture (white dents under the screen).
2. Check if the connector is playing when you connect the cable, and if it's wobbling, it's probably rations off.
3. Light a flashlight inside the connector: if you see rust or green plaque - the board has oxidized.

If the phone falls and then the charging stops working, don't try to disassemble it yourself - without experience you can damage the plumes or the display. Service centers use ultraviolet lamps to diagnose, which show traces of moisture that are invisible to the eye.

7. When to contact the service center - prices and guarantees

If you have tried all the methods, but the Xiaomi phone is still not charging, it is time to contact the specialists. Here are the approximate prices for repairs (data for 2026 for Moscow and the regions):

Before you carry your phone for repair:

• 📋 Check the warranty (if the phone was purchased less than a year ago) repairs are free, but only if the problem is not your fault (for example, not after a fall).
• 🔍 Compare prices in 2-3 services. Sometimes replacing the battery in an unofficial center costs 2 times cheaper than Xiaomi.
• 📦 Back up the data (if the phone is still on) and after the board or firmware is repaired, the information may be erased.

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Xiaomi’s official service centers in Russia work through partners (for example, “Svyaznoy Service”). Before visiting, check whether self-diagnosis (for example, disassembling the phone) will cancel the warranty.

FAQ: Frequent questions about Xiaomi charging