Your Xiaomi smartphone is charging twice as long as it normally does, and the battery light is barely crawling to the right? This is a common problem faced by owners of devices from Redmi, POCO and the Mi lineup, regardless of model and year of release. In some cases, battery wear is to blame, in others, software failures or incorrect settings. But most often the reason lies in a combination of several factors that can be fixed without visiting a service center.
In this article, we will not only list the possible causes of slow charging, but also show how to diagnose the problem with Xiaomi’s built-in tools, what tests to run at home, and what to do if none of the tips did not help. Particular attention will be paid to models with support for fast charging (for example, Xiaomi 13 Pro or Redmi Note 12 Pro+), where the drop in charging speed is noticeably stronger due to the high initial performance.
Before you run to the service or buy a new battery, check all the points from our guide - in 80% of cases, the problem is solved in 10–30 minutes.
1. Checking of charger and cable
The most common, but also the most common, cause of slow charging is faulty or faulty cable/power supply. Even if they look good, internal damage (such as broken veins in the cable or bloated capacitors in the unit) can reduce current by up to 50-70%, especially for cheap Chinese accessories, which often come with low-end Redmi models.
How to check:
- 🔌 Use the original power supply from Xiaomi (it should be marked with supported protocols: Quick Charge) 3.0/4.0, PD or MI Turbo Charge).
- 📱 Try charging another phone with the same cable - if it also charges slowly, accessories are the problem.
- 🔍 Check the cable for clamps, melts or insulation damage, especially near the USB-Type C connector.
- 📊 Check the power of the unit with the Ampere app (available on Google Play). Normal current for fast charging is from 1.5–2.5A.
If you have a model that supports wireless charging (such as the Xiaomi 13 Ultra or Mi 11), make sure you use a certified Qi station with a power of at least 10–30 W. Cheap wireless charging often limits power to 5 W, which is 4–6 times slower than the original.
⚠️ Note: Some Xiaomi models (e.g, POCO F5 or Redmi K60) Automatically reduce charging current when using uncertified accessories, which is designed to protect the battery, but results in 30-50 times more charging time%.
Battery wear: how to check and what to do
The lithium polymer batteries in Xiaomi smartphones are designed for 500-800 charging cycles, after which their capacity begins to fall steadily. If your phone is older than 2-3 years, chances are that the battery is worn out by 30-50%, and with this, the charging speed has decreased.
How to diagnose wear:
- 📉 Check the battery status through Settings → Battery → Battery status: If the capacity is below 80% of the original capacity, it's time to think about replacing it.
- 🔥 Use the AccuBattery app (available on Play Market) to show real wear, temperature and charging speed in mAh.
What to do:
- 🔄 Battery calibration: fully discharge the phone, then charge to 100% without interruptions. Repeat 2-3 times.
- 🛠️ Replacement of the battery: in official Xiaomi services, the replacement cost starts from 1,500-3000 ₽ (model-wise).
- ⚡ Turn off charging optimization in settings (if enabled): Settings → Battery → Optimizing charging.
| Xiaomi model | Average battery life | Signs of wear and tear |
|---|---|---|
| Redmi Note 10/11 | 2.25 years | Charging in 3+ hours, spontaneous shutdowns at 20-30% |
| Xiaomi 12/13 | 2.5–3 years | Heating during charging, the capacity drop to 70% in 1.5 years |
| POCO X3/X4 | 1.5-2 years | Fast landing in games, does not keep charge in the cold |
| Mi 11 Ultra | 3-4 years | Slow wireless charging, swelling of the body |
⚠️ Warning: If the battery is swelling (the phone body is convex or the screen is "stepping away" from the frame), immediately stop using! This battery may ignite.
3. Software failures and settings that inhibit charging
Sometimes slow charging is not caused by hardware, but by software restrictions that Xiaomi puts in place to protect the battery, such as MIUI 13/14 models that have Adaptive Charging, which artificially slows things down after 80 percent if the phone is connected to the network for a long time (e.g., at night).
- 🤖 Background processes that consume energy during charging (e.g., app updates or Google Photo sync).
- 🔄 Firmware errors, especially after the update MIUI.
- 📵 Power saving mode that limits charging current.
How to eliminate:
- Open the Settings. → Battery → Battery settings and turn off: ✅ "Adaptive charging" ✅ "Optimizing charging" ✅ "Energy saving regime"
safe-haven
MIUI
Settings → About the phone → Resetting settings
Turn off adaptive charging | Turn off power saving mode |Close background applications |Update MIUI to the latest version-->
If the problem has occurred after the MIUI update, try to roll back to the previous version via Settings → About Phone → System Update → Three Points → Select an update package. Download firmware only from the official Xiaomi website or trusted resources like Xiaomi Firmware Updater to avoid viruses.
4.Overheating phone: why it slows charging
Xiaomi equips its smartphones with a system of protection against overheating, which automatically reduces the charging current if the battery temperature exceeds 40-45 ° C. This can occur not only in summer or in hot rooms, but also because of:
- 🎮 Games or heavy applications (such as Genshin Impact or Call of Duty Mobile) running while charging.
- ☀️ Direct sunlight or finding your phone near heat sources (e.g., on a car torpedo).
- 🔋 A broken battery that warms even in a simple.
- 📶 Bad network signal (the phone is constantly looking for a connection that loads the processor).
How to lower the temperature:
- 🧊 Remove the case while charging - it can block the heat sink.
- 🌬️ Use a cooling stand (especially for gamers like Black Shark or Black Shark). POCO F4 GT).
- ❄️ Disable unnecessary functions: NFC, Bluetooth, GPS and background activity of applications.
- 📴 Do not use your phone while charging (especially for games or video calls).
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If the phone heats up even in plain, check it for viruses with Malwarebytes or the built-in MIUI Security antivirus.Some cryptocurrency miners can load the processor 100%, which leads to overheating.
To check the temperature in real time, install the AIDA64 or CPU Monitor app. Normal charging rates:
- 🌡️ Up to 35.°C - optimal.
- 🌡️ 35–40°C is acceptable, but the charging speed may decrease.
- 🌡️ Over 45.°C - the system will forcibly limit the current.
5. Problems with the charging connector: diagnosis and cleaning
A contaminated or damaged USB-Type C connector is another common reason for slow charging, and dust, pocket pile, or contact oxidation can impair the connection, causing the phone to recharge and shut down, and in some cases Xiaomi even issues a notification saying, "Slow charging. Check the cable."
How to clean the connector:
- 🕯️ Use a wooden toothpick (not metal!) to carefully remove debris.Do not press too hard to avoid bending the contacts.
- 💨 Blow the connector with compressed air (for example, a canister to clean the keyboard).
- 🔌 Check the contacts for oxidation - if they are green, wipe them with alcohol (90%+).
- 🔍 Check the connector for physical damage (such as bent pins). If you have any, you need to replace the connector.
If you have a problem after cleaning, try to move the cable slightly in the connector while charging. If the current appears, it goes away - either the cable or the connector itself is to blame. In the latter case, repair will be required (the cost of replacing the connector in the service is from 800 to 2 000). ₽).
⚠️ Warning: Never use needles, pins or other metal objects to clean the connector! This can close the contacts and disable the power controller.
What to do if a liquid is in the connector?
6.The effect of the background on the charging speed
Many users do not take into account that background processes can significantly slow down charging, for example, if during the connection to the network the phone:
- 📤 Updates apps through Play Market.
- ☁️ Syncs files with Google Drive or Mi Cloud.
- 📡 Downloads torrents or game updates.
- 📍 Uses it. GPS navigation (e.g. Yandex.Maps or Google Maps).
All the energy is spent on these tasks, not on charging the battery.
How to minimize the impact of the background:
- ✖️ Turn off automatic app updates in Play Market: Settings → Auto-update of applications → Never.
- 🚫 Ban background activity for unnecessary apps: Settings → Annexes → Permits → Auto-start.
- 📴 Turn on the "In the plane" mode for charging time (if you do not need the Internet).
- 🔋 Use the "Charging Mode" in Game Turbo (available on gamer models) POCO and Black Shark).
To see which applications are using energy while charging, go to Settings → Battery → Battery Use. If an application is using more than 10-15% of its charge per hour, force it to close.
7. Problems with firmware and power controller
In rare cases, slow charging is due to a power controller malfunction or firmware errors.
- ⚡ The phone is charged only when it is off.
- 🔄 The swelling is in the snag (i.e., no).
- 📉 Charging speed drops to 0.1-0.5A (checked in Ampere).
- 🔋 The phone does not recognize the original power supply.
What to do:
- Update MIUI to the latest version via Settings → About Phone → System Update.
- Reset the power controller settings: 1. Turn off the phone. 2. Press Volume up + Power before the Mi.3 logo appears. From the Fastboot menu, select Clear Power Data (if any).
- Flash your phone through the Mi Flash Tool (instructions on the official Xiaomi website).
⚠️ Warning: The wrong firmware can turn your phone into a brick. If you're not sure about your skills, trust the professionals.
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If the phone stopped charging after a fall or impact, the power controller is likely damaged or the battery plume has fallen off, in which case self-repair is not recommended - diagnostics are required in the service.
8.When is the time to bring the phone to the service
If you’ve tried all the tips in this article, but Xiaomi’s phone still charges too long, it’s probably more serious than it seems.
- 🔧 The battery swelled (sees the deformed body).
- ⚡ The phone does not charge at all or only charges when it is off.
- 🔥 Battery heats up to 50°C+ loadlessly.
- 📉 Battery capacity dropped below 60% of the original.
- 💥 There was a smell of burning or smoke from the charging connector.
The cost of diagnostics in official Xiaomi services is usually free, and repairs are cheaper than buying a new phone.
| Type of repair | Cost (₽) | Date(s) |
|---|---|---|
| Battery replacement | 1 500–3 000 | 1 |
| Replacement of USB-Type C connector | 800–2 000 | 1–2 |
| Repair of the power controller | 2 500–5 000 | 2–3 |
| Flashing (if the software fails) | 500–1 500 | 1 |
Before visiting the service, make a backup copy of the data (Settings) → System system → Backup) and pull out SIM-Also check if your phone has a warranty - if so, repairs can be free.