Xiaomi smartphone owners often face a situation where the device is connected to charging, but the lock screen or notification panel displays the status of “discharges” instead of the expected “charges.” This is not just a cosmetic bug – the signal can indicate problems with the battery, charger or even firmware. In some cases, the phone continues to lose charge despite the cable connected, which leads to a complete discharge and shutdown.
The reasons for this behavior range from the banal use of a non-original charger to serious hardware malfunctions. It is important to understand that ignoring the problem can lead to accelerated battery wear or even failure of the power controller. In this article, we will analyze all possible scenarios why Xiaomi shows “discharge”, how to diagnose the problem on its own and what to do to fix it, from simple actions to radical measures.
Note that if the status changes from “charged” to “discharged” periodically (for example, when used actively while charging), this may be the norm for high-power smartphones with fast charging.
Why Xiaomi shows “discharge” when connected charging
There are five main reasons for this behavior, and they are divided into software and hardware.
Insufficient power of charger
Xiaomi smartphones of the latest generations (for example, Redmi Note 12 Pro)+ Xiaomi 13 Ultra Requires Chargers with Power from 33W If you use a power supply on the 5W or 10W (For example, from an old phone, the charging current may be less than the current of the screen and the processor, and as a result, the battery continues to run out despite the cable being connected.
2. Damaged cable or connector USB-C
Microcracks in the wire, oxidation of the contacts in the connector, or physical damage to the port lead to an unstable connection. The phone may recognize the connection, but the actual charging current will not be enough, especially for devices that often connect/disconnect from charging.
3. Failure of the power controller or firmware Charging controller (PMIC) It controls the power distribution in the smartphone, and if it doesn't work properly (because of overheating, falling, or firmware error), the phone may misidentify the charging status. MIUI or reset.
Battery wear and tear
Lithium polymer batteries degrade over time, and after 500 to 800 charging cycles, their capacity decreases by 20 to 30 percent, and internal resistance increases, so even the original charger can't make up for the loss, and the phone discharges faster than it charges.
Background and overheating processes
Games, videotaping in 4K Or the navigator, when you charge it, puts a peak on the processor, and if the cooling system fails, the smartphone automatically limits the charging current to avoid battery damage, and in extreme cases, the protection can go off, and the phone stops charging at all.
- 🔌 Unoriginal cable/charger is the most common cause (70% of cases).
- 🔋 Battery wear – relevant for phones over 2 years old.
- 📱 Failure MIUI — especially after updates or rooting.
- 🔥 Overheating – blocks charging at temperatures above 45°C.
How to Check Why Xiaomi is Not Charging
Before you bring your phone to the service, do a home diagnostic, and let's start with a simple step:
1.Check the charger and cable
Connect another original cable and power supply (preferably with Quick Charge or Turbo Charge support).
Try charging your phone from a computer or power bank, and if the status changes to "charged", the charger is the problem.
- Check the connector. USB-C on the phone - when connecting the cable should not be backlash.
2. Eliminate software failures
- Restart your phone in Safe Mode (click the power button) → «Restart in Safe Mode. If this mode is charging normally, it's the third-party app's fault.
Check the temperature of the case: if the phone is hot, let it cool for 10-15 minutes, then reconnect.
3. Battery diagnostics
- Enter the code ##4636## in the phone app, go to the Battery Information menu.
- Charge level (should increase when charging).
- Temperature (normal: 25-40)°C).
Condition (if you say "Unknown" or "Bad", the battery is faulty)
Install the AccuBattery app (from Google Play) for a detailed analysis of charging capacity and current.
Test of the power controller
Connect your phone to charge and watch the indicator (light bulb or icon on the screen) if it flashes or periodically goes out, the problem is in the contacts or controller.
Try charging the phone off, and if it's going off, it's the firmware or the background.
⚠️ Warning: If the phone turns off or restarts when charging, turn it off immediately! This is a sign of a short circuit in the battery or board - urgent repair is required.
| Symptoms. | Probable cause | Decision |
|---|---|---|
| Status "discharges" with any charging | Faulty power controller | Diagnostics in the service |
| Charging is only in the off state | Failure MIUI driver | Resetting or flashing |
| The phone is heating up and not charging. | Overheating of the battery or processor | Cool the device, check background processes |
| Charging is interrupted when the cable is moving | The USB-C connector is damaged. | Cleaning or replacing the connector |
Software Ways to Resolve the Problem
If the diagnosis showed that the problem is not in the “iron”, try the software methods:
1. Reset charging settings
- Go to Settings. → Battery and productivity → Battery settings.
- Select “Reset Battery Statistics” (in some versions) MIUI The option is called "Calibration»).
After resetting, completely discharge the phone (before turning off), then charge to 100% without interruption.
2. Cleaning the system cache
- Open the Settings. → Memory. → Cleaning (or Settings) → Annexes → Application management → Cash).
Click “Clear Cache” for all applications.
- Reboot the phone.
3.Retracting MIUI updates
If the problem has occurred after the update, try to roll back to the previous version:
Go to Settings → About the phone → System update.
- Click on three dots in the upper right corner → «Select a Service Package».
Download from the official Xiaomi website old firmware and install it manually.
4. Removal of problematic applications
Check if you are charging in Safe Mode, and if so, uninstall recently installed apps (especially optimizers, launchers, or games).
- Check the autoboot: Settings → Annexes → Autoboot and disable unnecessary programs.
Check the version. MIUI topicality|Clear the system cache|Reset battery statistics|Remove suspicious applications|Restart your phone in safe mode-->
Hardware malfunctions and their repair
If the software methods didn't work, the problem is physical. Let's look at the typical cases and solutions.
1. The connector is damaged. USB-C
Signs: charging is only in a certain position of the cable, the phone does not recognize the connection to the PC.
- Solution: replacement of the connector (cost: 1000-2 500) ₽ model-wise).
Temporary workaround: Use wireless charging (if supported).
2. Worn-out battery
Signs: the phone discharges in 2-3 hours, swelling of the body, status "discharges" even with the original charging.
- Solution: battery replacement (cost: 1,500–4,000) ₽). Xiaomi recommends using batteries with an original controller (e.g., from the ATL sunwoda).
3. Faulty power controller (PMIC)
Signs: the phone does not turn on without a battery, charging is jerky, spontaneous reboots.
- Solution: diagnostics and soldering works (cost: from 3 000) ₽). In 30% of cases, a replacement motherboard is required.
4. Charging charge issues
Signs: the phone is charged only from a certain charger, the status “discharges” appears 5-10 minutes after connection.
- Solution: soldering elements or replacement of the charging module (cost: 2000–5,000) ₽).
⚠️ Note: If the phone doesn't charge after the battery is replaced, the reason may be incompatibility of the controllers, POCO F3 or Redmi K40) Requires the new battery to be installed through EDL-regime.
How do you check for battery bloating?
What to do if Xiaomi is running out of cold
Many users notice that in the cold (< 0°C) the phone loses charge dramatically or displays "discharge" status even when it's connected to a charge. This is normal behavior in lithium polymer batteries, but it can be minimized:
1.Do not use your phone outside in sub-zero temperatures
- At 10.°C battery capacity drops by 30-50%, and at -20°C phone can shut down despite 30-40% charge.
If you need to call urgently, keep your phone closer to your body (for example, in your jacket’s inner pocket).
2.Use heated covers
Special battery-heated cases (such as Zagg or Mophie) keep the battery temperature normal.
3.Don't charge your phone in the cold
- Charging at lower temperature +5°C accelerates battery degradation. Let the phone heat up to room temperature before plugging in the charger.
4. Disable unnecessary functions
- Turn it off in the cold.
- 5G/LTE (cross over 3G).
Geolocation and background activity of applications.
- High brightness.
- It'll reduce the battery load.
💡
If the phone goes off in the cold, don't try to turn it on right away! +10°C in a warm room, otherwise you risk damaging the power controller.
How to prolong the life of Xiaomi battery
To avoid charging and discharge status issues, follow these guidelines:
- 🔋 Use original chargers with Quick Charge support 3.0/4.0.
- 📉 Avoid full discharge – connect charging at 15-20% charge.
- 🔥 Don’t overheat your phone – don’t leave it in the sun or near heat sources.
- 🔄 Calibrate the battery every 3 months (discharge to 0% → charge up to 100% without interruption).
- ❄️ Keep your phone at 40-60% charge if you don’t use it for long periods of time.
It is also useful to disable charging optimization in settings MIUI:
- Go to Settings → Battery and Performance → Battery Settings
- Turn off the Adaptive Charging option (it limits the current to extend battery life, but sometimes it doesn’t work properly).
- Turn on “Fast Charging” (if it is turned off).
💡
The optimal temperature for charging Xiaomi – from +10°C +35°C. Exceeding these limits accelerates battery wear by 2-3 times.