Did you connect a Xiaomi Redmi Note 12 or POCO X5 to charge, but the indicator is not burning, and the percentage of the battery is not growing? Or does the phone show charging, but the battery is discharged faster than it fills up? Charging problems are one of the most common malfunctions of Xiaomi smartphones, and there can be dozens of reasons: from banal contamination of the connector to serious hardware breakdowns.
In this article, we’ll look at all the possible reasons why Xiaomi isn’t charging, from software failures to physical damage. You’ll learn how to diagnose a problem yourself, what manipulations you can do at home, and when you should carry your phone to the service. Particular attention will be paid to models with fast charging (Redmi Note 11 Pro+, Xiaomi 13T), where problems often involve a power controller or firmware.
Don’t rush to buy a new battery or charger – 70% of the time the problem is solved in 10 minutes! But if after all the checks the phone does not charge, we will tell you how much it will cost to repair and how not to run into scammers in the service.
🔋 Important: If your Xiaomi doesn’t respond to charging at all (no indication, no switching on), first check the power supply and cable on another device.
1. Checking of charger and cable
Start with the simplest test of charging, most often a faulty power supply or a damaged cable, especially for Xiaomi owners with fast charging (33W, 67W, 120W), where cables fail faster due to high currents.
Here's how to check:
- Connect another charger (preferably original or certified) to your phone.
- Try another cable (USB-C or Micro-USB, depending on the model).
- Check if the charging indicator on the power supply is on (if any).
- Connect your phone to your computer or power bank – if charging is going on, the problem is the power supply.
⚠️ Caution: Cheap uncertified cables can burn the power controller in the phone.If Xiaomi stopped charging after using the original cable, it most likely burned down. U2-Charging controller, which requires rationing at the service center.
Tip for fast charging models: If your POCO F4 GT or Xiaomi 12 Pro charges slowly (e.g. 1% in 10 minutes), check if your power supply supports Quick Charge 3.0/4.0. Non-original charges often give out the claimed 67W on paper only.
2. Cleaning of the charging connector: dirt and oxidation
One of the most common reasons why Xiaomi doesn’t charge is a contaminated USB-C/Micro-USB connector. Dust, pile, moisture, and even contact oxidation can interrupt the connection, especially for phones that are often carried in your pocket or bag.
How to clean the connector yourself:
- 🔦 Light the connector with a flashlight – if you see dirt, dust or darkened contacts, they need to be cleaned.
- 🧼 Use a wooden toothpick (not metal!) or soft brush for careful cleaning.
- 💨 Blow the connector with compressed air (for example, a canister for cleaning equipment).
- 🚫 Do not use alcohol or liquids – they can damage the coating of contacts.
If the contacts are oxidized (green or darkened), they can be gently wiped with a cotton swab dipped in isopropyl alcohol (at least 90%). After cleaning, allow the phone to dry for 10-15 minutes.
⚠️ Warning: If the connector wobbles or luftites after cleaning, it is a sign of mechanical damage, in which case the connector will need to be replaced (cost: 800 to 2000). ₽ model-wise).
What happens if you clean the connector with metal objects?
3. Battery problems: wear and bloating
Xiaomi's average battery life is 2-3 years (or 500-800 charge cycles). If your phone is older, the battery may have degraded and stopped holding charge.
- The phone is charged only when it is off.
- The battery is discharged quickly (from 100% to 0% in 2-3 hours).
- The battery is swollen (the phone body is curved, the screen is "going away").
- The swelling is then turned off (and then turned off).
How to check the status of the battery:
- Go to Settings → Battery Status (on some models, path: Settings → Battery & Performance → Battery Status).
- If you have a "capacity" item, compare the current value with the passport (for example, 4500 mAh vs 5000 mAh).
- Use apps like AccuBattery (Android) for detailed diagnosis.
If the battery capacity has fallen below 60 percent of its nominal capacity, it needs to be replaced, and continued use of the worn-out battery can cause the phone to suddenly shut down or even catch fire.
| Symptoms. | Probable cause | Decision |
|---|---|---|
| The phone is charged only when it is off. | Severe battery wear or controller failure | Replacement of the battery or diagnostics in the service |
| Battery swelling (body deformed) | Chemical decomposition of lithium-ion elements | Immediate replacement, risk of fire! |
| Charging is jerky (0% → 1% → 0%) | Poor contact in the connector or controller failure | Cleaning the connector or repairing the board |
| The phone warms up when charging and discharges quickly | Battery degradation or background processes | Capacity check and reset settings |
4. Software failures
Sometimes Xiaomi doesn’t charge due to software bugs, such as firmware failure, application conflict, or system files, which is especially true after a MIUI update or custom firmware installation.
How to diagnose and correct:
- 🔄 Reboot your phone – sometimes a banal reboot helps.
- 📱 Run in Safe Mode: Press the power button before the menu appears. Press and hold "Switch off" → You will be able to switch to Safe Mode.
If you are charging in Safe Mode, the problem is in one of the installed applications.
Reset the settings.
Settings → About the phone → Resetting settings
Check the phone.
Fastboot
Recovery
⚠️ Note: If after the update MIUI The phone has stopped charging completely, maybe the battery calibration has gone off, in which case a full discharge (before switching off) and subsequent charging to 100% without interruption will help.
Try another charge |Reboot phone |Run in Safe Mode |Check heated apps |Reset settings (if necessary)
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5. failure of the charging controller or USB-port
If all previous methods did not help, the problem may lie in the hardware:
- The charging controller burned down (a common problem when using non-original charges).
- The contacts of the connector from the board were torn off (for example, after a fall).
- He's out of action. USB-Hub (on some Xiaomi models it is combined with a connector).
🔧 What do you do:
- 🛠️ If you have soldering experience, you can try soldering the connector or controller yourself (but the risk of damaging the fee is high!).
- 🏥 Take it to the diagnostic service. Average cost of repair: Replacement USB-port: 800–2,000 ₽. Repair/replacement of the charging controller: 2500–5000 ₽. Contact soldering: 1500–3000 ₽.
💡
Before going to the service, take a picture of the IMEI of the phone (on the box or in the About Phone settings → General information). This will help to avoid replacing components in unscrupulous workshops.
6. Effect of moisture and corrosion
Even if your Xiaomi hasn’t drowned in water, humidity (sweat, rain, condensation) can cause contacts to corrosion.
- 🌊 There was a warning on the screen about the moisture in the connector.
- 🔌 The charger works once in a while (it goes, then not).
- 🔋 The phone is disconnected when connected to charging.
- 🔍 White or green spots are visible on the connector contacts (oxidation).