Why Xiaomi Redmi phone stopped charging: a full analysis of the causes and solutions

Your Xiaomi Redmi suddenly refused to charge, and you don't know what the problem is? This problem can occur on new models (Redmi Note 12 Pro+, Redmi 13C) and on older devices (Redmi 9A, Redmi 7). The reasons range from the trivial (damaged cable) to the serious (power controller failure). In this article, we will analyze all possible scenarios why the phone does not take charge, and give step-by-step instructions for troubleshooting, from simple checks to complex hardware solutions.

It's important to understand that if Redmi doesn't charge, it doesn't always mean that the battery is broken. Often it's software failures, connector contamination, or a faulty charger. We can help you diagnose the problem accurately without going to the service center -- saving you time and money. We can start with the most obvious causes and gradually move on to more complex ones.

1. Checking of charger and cable

The first thing you need to do is make sure that the charging and the cable are working, and statistically, 40 percent of the time, this is where the problem lies.

• 🔌 Connector. USB-C/Micro-USB: Check if it has mechanical damage, bent contacts or traces of oxidation (green plaque).
• 📱 Cable: bend it in different places – if there are breaks insulation or cracking, the cable must be replaced.
• ⚡ Power supply: try charging your phone from another adapter (preferably the original Xiaomi with Quick Charge support).

If you have a voltmeter or tester, measure the voltage at the output of the power supply. For standard Xiaomi charges, it should be 5V ± 0.25V. Deviations over 5% indicate a malfunction. Also try connecting the phone to a computer or power bank - if charging has gone, the problem is definitely in the charger.

Note the power supply. Redmi models with fast charging support (Note 11 Pro, Note 10 Pro) require adapters for 33W or 67W. If you use a weak charger (5W or 10W), the phone may fail to charge or do so extremely slowly.

⚠️ Warning: Never use cheap, no-name cables with thin wires, which can not only damage the port of the phone, but also cause overheating or short circuit.

2. Diagnostics of the charging connector on the phone

If the charger is working, but the Xiaomi Redmi is still not charging, the problem may lie in the power connector of the phone itself, most often due to:

• 🧹 Pollution: Dust, pile or debris block contacts.
• 💧 Corrosion: ingress of moisture leads to oxidation of contacts.
• 🔧 Mechanical damage: bent or broken "tongues" in the connector.

To clean the connector, use a wooden toothpick (not metal!) or compressed air. If there are traces of oxidation, gently wipe the contacts with an alcohol tampon. Do not use abrasive materials - they can damage the coating.

If the connector is visually damaged (for example, bent contacts), you can try to straighten it carefully with a plastic blade. However, be careful: improper actions can completely disable the port, in which case it is better to contact a service center to replace the connector (the cost of repair is from 800 to 2000 rubles depending on the model).

Problems with the battery: how to identify them

If the phone doesn't turn on or charge, or it only charges when the cable is in a certain position, it could be the battery that's to blame. The Lithium Polymer batteries in Xiaomi Redmi have a limited lifespan -- typically 300 to 500 charging cycles -- and then the capacity drops and the device can behave unstable.

Signs of a faulty battery:

• 🔋 The phone discharges quickly (from 100% to 0% in 2-3 hours).
• ⚡ Charging is only in the off state.
• 🔥 Battery swollen (phone case deformed).
• 📉 The percentage of charge "jumps" (for example, from 50% immediately to 20%).

To check the battery status, use the engineering menu:

1. Type the code on your phone keyboard: ##4636##.
2. Go to the Battery Information section.
3. If you look at Health, if it shows Good, the battery is fine. If Unknown or Replace soon, you need a replacement.

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If the phone doesn't turn on but responds to charging (the indicator lights up), try holding it on a charge for 15-20 minutes. Sometimes a deep discharge blocks the start until the battery gains a minimum charge.

Critical information: If the battery is swelling, immediately stop charging and take the phone to the service.

4. Programmatic failures and their elimination

Sometimes Xiaomi Redmi doesn't charge due to firmware failures or conflicts with installed applications, and this is especially true after MIUI updates or custom firmware installation.

• 🔄 Rebooting the phone: Long pressing the power button (10-15 seconds) can solve the problem if the failure is temporary.
• 📱 Resetting settings: go to Settings → The phone. → Settings reset. Select Reset all settings (does not delete data).
• 🛠️ Safe Mode: Press the power button, then hold your finger on the "Stop" option, and you'll be prompted to go to Safe Mode. If it's charging, one of the apps installed is to blame.

If the phone doesn’t turn on at all, but reacts to the charging connection (the indicator vibrates or lights up), try a hard reset:

1. Turn off the phone from charging.
2. Press the button Power + Volume up for 10-15 seconds.
3. If the MI logo appears, release the buttons and the phone will reboot.

For models with unlocked bootloader (Redmi Note 10 Pro, Redmi K40) you can try to reflash the phone via Fastboot:

fastboot flash boot boot.img


fastboot flash system system.img

⚠️ Warning: Fastboot will delete all data from your phone.Be sure to have a backup of important files before the procedure.

5. Problems with the power controller

If all the previous steps didn't work, the problem could be the power controller, the chip that controls battery charging.

• 🔌 Stress stabilization.
• ⚡ Control of charging current.
• 📉 Protection against overheating and short circuit.

Signs of Controller Failure:

• 🔥 The phone warms up strongly when connecting charging.
• ⚡ Charging is only in the off state.
• 📉 The percentage of charge does not change or increases in leaps.
• 🔌 The phone does not detect the charger (no battery icon).

Unfortunately, replacing a power controller is a complex repair that requires:

• 🔧 Rations. BGA-Components (a professional soldering station is needed).
• 🔍 Diagnostics at the level of circuitry (checking supply chains).
• 💰 Spare parts (cost of the controller - from 500 to 2000 rubles).

Self-repair in this case is not recommended - there is a high risk of damage to the fee. Contact the service center with good reviews. The average cost of repair is 2500-4000 rubles depending on the model.

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If the phone stopped charging after a fall or impact, there is a 90% chance that the problem is mechanical damage to the power controller or the battery contacts that fell off.

6. Effect of moisture and corrosion

Moisture is one of the most common reasons why Xiaomi Redmi stops charging, even if the phone hasn't sunk, condensation or high humidity can cause corrosion on the board.

• 💧 On the screen appears a notification of moisture in the connector (on models with a moisture sensor).
• 🔌 The charger is blackened or covered with a green coating.
• 📱 The phone is self-rebooted when connected to charging.

What to do if your phone is caught in the rain or dropped in the water:

If it's been more than 48 hours and the phone's still not charging, it's likely that the contacts have corroded.

1. Take the phone apart (if you have experience) and inspect the oxidation fee.
2. Clean the contacts with isopropyl alcohol (90%+) and a soft brush.
3. If corrosion is severe, you will need to replace the connector or restore the tracks on the board.

Redmi Note 11 Pro+ 5G, Redmi K50 models have rubber pads and special board coatings, but even these don’t guarantee 100% protection – corrosion is inevitable when exposed to long-term moisture.

7. Problems with firmware and updates

Sometimes Xiaomi Redmi stops charging after a MIUI update or a failed firmware.

• 🐛 Bug in the system kernel (e.g., in the power controller driver).
• 📱 Conflict with custom recaveri (TWRP).
• 🔧 Incorrect energy saving settings.

How to fix it:

1. Try rolling back the update via Settings → About Phone → System Update → Three Dots → Roll back the update.
2. If the phone doesn’t turn on, run it through Fastboot with the official firmware from Xiaomi’s website.
3. Check your energy saving settings: go to Settings → Battery → Energy saving mode and turn off all restrictions.

For models with an unlocked bootloader, you can try flashing a custom core (such as FrancoKernel), which is often better optimized for power management.

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If the phone only charges when it's off, try resetting MIUI to factory settings via Recovery. To do this, press Power + Volume up when the phone is off.

8.When to contact the service center

If you’ve tried all the ways, but Xiaomi Redmi still doesn’t charge, it’s time to turn to the professionals.

• 🔥 Bloated battery (risk of fire).
• 🔧 Damaged board (collapsed elements, burned tracks).
• 💧 Corrosion after moisture (ursound cleaning required).
• ⚡ Short circuit (phone warms or sparkles when charging is connected).

Average prices for repairs in service centers (Moscow, 2026):

When choosing a service center, pay attention to:

• 📄 Certificates from Xiaomi.
• ⭐ Reviews on Yandex.Maps or Google Maps.
• 🔧 Warranty for repair (minimum 3 months).

⚠️ Warning: Avoid garage shops that offer repairs for pennies, often using unoriginal parts that can lead to repeated failure or even fire.

FAQ: Frequent questions about charging Xiaomi Redmi