Xiaomi phone shows charging, but does not charge: what to do?

The situation is familiar to many: you plug Xiaomi into charging, the lightning battery icon appears on the screen, but the percentage of charge does not increase, sometimes the phone even discharges, despite the cable connected. The causes of this malfunction can be both software (software failure, viruses) and hardware (damaged port, worn-out battery). In this article, we will analyze all possible solutions, from simple to radical, and explain how to diagnose the problem yourself.

It is important to understand that ignoring the symptom can lead to a complete battery failure or failure of the power controller. For example, if the Xiaomi Redmi Note 10 Pro phone shows charging but does not charge due to oxidized contacts, over time this can cause a short circuit. On the other hand, sometimes a banal firmware failure is to blame, which is eliminated by rebooting.

Before you take the device to the service center, try the methods in this article. We have collected proven methods that work on models from Redmi. 9A Xiaomi 13 Ultra. Pay special attention to the sections on port diagnostics USB-C and checking the power supply - these nodes are most often the source of the problem.

1. Checking of charger and cable

Start with the simplest: testing the charger. Often users blame the phone, even though the problem is a faulty power supply or a damaged cable. Take another charger (preferably original from Xiaomi or certified Quick Charge). 3.0/4.0) Check if the device behavior changes.

Pay attention to the following signs of cable failure:

• 🔌 Visible inflections or ruptures of the squirrel near the connectors
• 🔥 Darkening/Melting of Plastic on the Connector USB-C
• ⚡ Unstable connection (phone is charged, then not when the cable moves)

If you don't have a spare cable, connect your phone to your computer or power bank. If you're charging, the power supply is a problem. If you're not, check the port on your phone.

⚠️ Warning: Never use cheap, uncertified chargers with higher power 30W For Xiaomi models that don't support fast charging, this could knock out the power controller.

For accurate diagnosis, use a multimeter (if you have one at hand). Measure the voltage at the output of the power supply: for standard charging, it should be 5V ± 0.2V, fast-paced — 9V/12V It's more than a model. 10% talk about malfunction.

2. Clearing the port USB-C oxidation

Port port USB-C Xiaomi's smartphones are one of the most vulnerable places, and over time, they accumulate dust, villi, and the contacts become oxidized from moisture, which leads to poor contact and false charging, so that you can clean the port yourself:

You'll need:

• 🕯️ Toothpicking (wooden or plastic)
• 🧴 Alcohol (isopropyl 90% or medical)
• 🪥 Cotton swabs (thin, for the ears)
• 🔦 Lantern (for illumination)

Step-by-step:

1. Turn off the phone and remove it. SIM-memory-card.
2. Hold the flashlight to the port and check for debris, often getting stuck inside of the fibers from clothes or paper dust.
3. Carefully put toothpick visible contamination, without pressing on the contacts.
4. Soak the cotton swab in alcohol and wipe the inner walls of the port. Don't use the liquid in excess!
5. Allow the port to dry for 10-15 minutes before charging.

⚠️ Warning: Do not use metal objects (needles, paper clips) to clean the port! this can close contacts and disable the charging controller.

If you still have a problem after cleaning, try to move the cable slightly in the port while charging, if the battery percentage starts to rise, the contacts are still contaminated or deformed, in which case you will need professional ultrasound cleaning at the service center.

Turn off the phone and remove it. SIM-map|

Prepare alcohol and cotton swabs|

View the port with a flashlight|

Remove the garbage with a toothpick (without pressing)|

Rub the contacts with alcohol and let them dry.-->

Diagnostics of battery and power controller

If Xiaomi’s phone is older than 2-3 years, the problem may be a worn-out battery or a faulty power controller.

Signs of battery wear:

• 🔋 The phone is discharged in 2-3 hours with moderate use
• 📉 The percentage of charge "jumps" (for example, from 50% drops to 15% per minute)
• 🔥 The body heats up in the battery area even without loading
• ⚡ Charging is only in the off state

For accurate diagnosis, use the engineering menu:

1. Open the Phone app and dial ##4636##.
2. Go to the section Information about the battery.
3. Look at the parameters Charge level, Condition and Temperature.

If the engineering menu displays the status Replace or the battery is swelling (as seen from the raised screen), it needs to be replaced urgently. Using a phone with a bloated battery is dangerous - the risk of fire!

The power controller is harder to diagnose, and you need a tester or an oscilloscope, and indirect signs of malfunction are:

• The phone does not turn on without a connected charger.
• Charging is only in the off state
• The power supply is turned off after 1-2 seconds after connection

4. Resetting and software update

Software failures are a common cause of "false" charging, such as after an update. MIUI It can be battery calibration, or background processes block charging. Start with simple steps:

Method 1: Reboot in Safe Mode

1. Press the power button before the off menu appears.
2. Press and hold the item "Switch off (or turn off power)."
3. Confirm the transition to Safe Mode.
4. Connect the charger and check if charging is going.

If the phone is charging in safe mode, the problem is in one of the installed applications: uninstall recently added programs or perform a reset.

Method 2: Calibration of the battery

Reset the calibration data:

1. Charge your phone to 100% and disconnect from the network.
2. Turn off the device and reconnect to charging for 1-2 hours.
3. Turn off the charging, turn on the phone and let it discharge before automatically turning off.
4. Charge to 100% without interruption.

Method 3: Reset to factory settings

If the previous methods did not help, do a hard reset:

1. Go to Settings → About the phone → Reset settings.
2. Choose to erase all data.
3. Confirm the action (you will need to enter a pattern lock or password).

⚠️ Warning: Before reset, save important data! After hard reset, the phone will return to the "out of the box" state, and all files will be deleted.

Also check the relevance of the firmware:

• Open Settings → About the phone → System update.
• If an update is available, install it.

In some models (POCO X3, Redmi K40) Charging bugs were fixed in security patches.

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If the phone doesn’t turn on even after resetting, try booting up in Fastboot mode (clip the power). + Volume down) and run the stock firmware through the Mi Flash Tool.

5. Check for physical damage and moisture

Xiaomi smartphones (especially the budget Redmi series) are sensitive to falls and moisture. Even if the phone hasn't sunk, condensation or high humidity can cause contacts to corrosion.

Signs of physical injury:

• 💧 Traces of liquid under the screen or in ports (moisture indicator turned red)
• 📱 Cracks on the hull near the port USB-C
• 🔊 Distorted sound in the dynamics (may indicate oxidation of the motherboard)
• 🔋 Battery bloating (screen or back cover raised)

If the phone falls or comes into contact with water:

1. Turn it off immediately and remove it. SIM-map.
2. Place the device in a silica gel (or rice) bag for 24 to 48 hours.
3. Do not turn on or connect to charging until completely dry!

To check for moisture, use test strips (you can order them on AliExpress). The strips change color when in contact with liquid - insert one into the port. USB-C If it turns red, it's moisture in the port.

If the phone fell, check the integrity of the contacts on the motherboard, this will require disassembling the device (doing this on your own is not recommended - the risk of damaging the plumes), the diagnostic service will cost 300-500 rubles.

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If the moisture indicator has gone off (red), do not connect the phone to charge! this can short-circuit and disable the power controller.

6. Alternative charging methods

If standard charging doesn't work, try alternative methods that can help you temporarily fix the problem or confirm the diagnosis.

Method 1: Wireless charging

Xiaomi models with Qi support (Mi 11, Mi 12, Redmi) K50) You can charge it with a wireless station. If the phone charges like this, the problem is exactly in the port. USB-C or its controller.

Method 2: Charging through OTG-cable

Connect your phone to another device (such as a power bank) OTG-If you're charging, the port on your phone is broken.

Method 3: Charging in the off state

Some Xiaomi smartphones (for example, POCO F3) They block charging when you're active:

1. Turn off the phone.
2. Get the charger on.
3. Wait 10-15 minutes and turn on the device.

Method 4: Charging from a computer

Connect the phone to USB-If you're charging, it's the power supply problem, and if you're not, it's in the port of the phone or the cable.

7. When to contact the service center

If none of these methods worked, the problem is likely hardware.

Situations requiring repair:

• 🔧 Damaged port. USB-C (lens)
• 🔋 Battery bloating (sees from the deformed housing)
• 💻 Power controller malfunction (diagnosed by the tester)
• 🌊 Traces of corrosion on the motherboard after moisture hit
• 🔌 Short circuit (the phone heats up and immediately shuts down when charging is connected)

Cost of repair in the service (example prices for Moscow):

• 🔌 Port replacement USB-C: 1 200–2 500 ₽
• 🔋 Battery replacement: 1,500–4,000 ₽ (model-wise)
• 💻 Replacement of the power controller: 2,000–5,000 ₽
• 🌊 Corrosion cleansing: 1,500–3,000 ₽

Choose a service center with an official Xiaomi license, which guarantees the use of original parts. Before repairing, ask for a free diagnostic (in most services it costs 300-500 dollars). ₽, This amount is included in the cost of repairs).

If the phone is warranty, don't disassemble it yourself! Opening the case will void warranty obligations. Contact the authorized Xiaomi service center with a check and a box.

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When replacing the battery in an informal service, require a spare part with a capacity not lower than the original. Cheap analogues are 2-3 times smaller and can swell in 3-6 months.

FAQ: Frequent questions