Why Xiaomi is so slow to charge and how to fix it

Your Xiaomi has started charging like a turtle, even though it used to fill up in an hour? This is a common problem faced by owners of Redmi Note 10, POCO X3, Mi 11 and other smartphones. Slow charging is not only annoying, but can signal serious malfunctions, from worn-out cable to a firmware failure.

In this article, we'll look at all the possible causes, from the commonplace (contaminated connector) to the hidden (power saving restriction in MIUI), you'll get step-by-step instructions from the photo, charger compatibility tables and diagnostic checklists, and if the problem is hardware, you'll learn how to tell a software failure from a battery failure without disassembling the phone.

Spoiler: 70% of the time, it’s not the smartphone itself that’s to blame, but a non-original cable or power supply with inappropriate fast-charging protocols, but there are less obvious nuances, such as why Xiaomi can artificially limit charging current at high ambient temperatures.

1. Checking of charger and cable

Start with the simplest: 9 out of 10 slow-charging problems are associated with poor-quality accessories. Even if you use Xiaomi’s native cable, it could wear out in 1-2 years of active use.

Here's how to check the components:

• 🔌 Power supply: the original adapter Xiaomi should be labeled MDY-11-ES (18W), MDY-12-ES (33W) or MDY-13-EZ (67W). Counterfeiting often poses as a lack of barcode or blurry printing.
• 📱 Cable: inspect the connector USB-C If you have bent contacts or oxidation, try to move the cable in the nest a little bit, and if you get charged, you lose it, the problem is that it's not there.
• ⚡ Power: Connect your phone to another Quick Charge-enabled charger 3.0/4.0 If you're up, your adapter won't give you the declared watts.

A simple test: take a charger from another smartphone (like Samsung’s Fast Charge-enabled one) and check the speed. If Xiaomi starts charging faster, your original power supply is out of order.

2. Cleaning the USB-C connector and contact diagnostics

Dust, pocket pile or contact oxidation can interrupt the connection, causing the phone to charge in jerky or "saving" mode. At Xiaomi, this manifests as a constant connection / disconnection of charging with a characteristic audible signal.

How to clean the connector:

1. Turn off your smartphone and get the SIM cards.
2. Take a wooden toothpick (not metal!) and carefully remove visible debris from the nest.
3. Soak the cotton swab in isopropyl alcohol (not vodka!) and wipe the contacts. Let it dry for 10 minutes.
4. Blow the connector with compressed air (for example, a canister to clean the keyboard).

If the problem remains after cleaning, check the connector for mechanical damage:

• 🔍 Light a flashlight inside the nest - contacts should be smooth, without bent "tongues".
• 📉 Connect your phone to your PC. If the data is unstable, the problem is the connector.

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After cleaning the connector, do not plug the charger immediately. Let the alcohol completely evaporate, otherwise a short circuit may occur.

3. Energy saving settings in MIUI

Xiaomi aggressively optimizes power consumption, and sometimes these settings interfere with normal charging. For example, Super Power Saving mode can limit current to 500 mA even if you plug in a powerful adapter.

How to disable restrictions:

1. Go to Settings → Battery and Performance → Battery Modes.
2. Select Performance mode (if available) or turn off Super Power Saving.
3. In the Settings → Battery → Battery settings, disable the option “Optimize charging” (it artificially slows down charging after 80%).

Also check the permissions for applications:

• 📱 Go to Settings. → Annexes → Application management → Threefold (⋮) → Special access → Optimizing the battery.
• 🔄 Find the Charging system application (or Battery) and select No Limitations".

Super energy saving mode is disabled |

Performance mode selected |

Charging Optimization disabled |

Application "Charging" without battery restrictions-->

4. Temperature restrictions and overheating

Xiaomi automatically reduces the charging current if the battery temperature exceeds 40-45 ° C. This is protection against battery degradation, but sometimes works falsely - for example, in the heat or when using the phone intensively while charging.

How to check the temperature:

• 🌡️ Install the app AIDA64 or AccuBattery and see the battery temperature in the Battery section".
• ❄️ If the temperature is above 40°C, turn off the phone from charging, turn it off for 15-20 minutes and let it cool down.
• 📵 Do not use your phone while charging (especially for games or videos) – this heats up the processor and battery.

Lifehack: If your phone warms even when it's simple, remove the case (especially silicone) - it worsens the heat sink. Also avoid charging in direct sunlight or near heat sources.

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If the battery temperature exceeds 45°C, the Xiaomi charging controller reduces the current to 1-1.5A, which is 2-3 times slower than usual.

5. Battery diagnostics and battery wear

Lithium-ion batteries degrade over time. After 300 to 500 charging cycles, their capacity drops by 20 to 30 percent, and charging speed decreases. If your Xiaomi is older than 2 years, the problem may be a worn-out battery.

How to check the status of the battery:

1. Enter the dialer code ##4636##.
2. Go to the Battery Information section and see the Health Level option (if any).
3. Or you can install AccuBattery and check for "Health," a value below 80 percent that indicates a lot of wear and tear.

Signs of a "dying" battery:

• 🔋 The phone discharges in 3-4 hours without loading.
• ⚡ Charging jumps (for example, from 30% immediately to 50% or back).
• 🔥 The body is swollen (put the phone on a flat surface - if it sways, the battery is swollen!).

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If the battery capacity in AccuBattery is less than 2000 mAh (at the initial 4000-5000 mAh), the battery is critically worn out and requires replacement.

The cost of replacing the battery in the service center Xiaomi:

6. Software failures and resetting of settings

Sometimes slow charging is caused by firmware glitches, especially after the MIUI update, for example, there was a bug in MIUI 13-14 versions that made the phone "not see" fast charging.

How to fix it:

1. Reboot your phone – sometimes it resets the time limits.
2. Reset the battery settings: Settings → Battery → Threefold (⋮) → Additionally. → Resetting battery settings
3. Update MIUI: Go to Settings → About Phone → System Update.
4. Reset all settings (if nothing worked): Settings → About Phone → Settings Reset → Reset all settings Attention! This won’t delete your files, but will reset Wi-Fi, wallpaper and other settings.

If the problem has occurred after the update, try to roll back to the previous version of MIUI via Fastboot (the instructions are on the 4PDA forum).But keep in mind that this is risky and can lead to a lock on the phone.

7.Problems with the charging controller and motherboard

If all previous methods failed, the problem may be in the hardware:

• 🔧 Charging controller damaged (often after falling or getting moisture).
• 🔌 Oxidation of contacts on the motherboard.
• ⚡ Power chain malfunction (for example, after a failed firmware).

Signs of hardware breakdown:

• 📵 The phone does not charge at all or only when it is off.
• 🔥 Charging is jerky, accompanied by crackling or the smell of burning.
• 🔋 The battery is discharged even when the charger is connected.

What to do:

1. Take your phone to Xiaomi’s diagnostic service center, and the average cost of a controller repair is 3,000 to 8,000 rubles.
2. If the phone is warranty, do not open it yourself - this will cancel the warranty.
3. Try charging your phone from another source (e.g. Power Bank or other source). USB-If the speed is as low, the problem is the phone.

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Before visiting the service, back up your data via Settings → Additional → Backup. After repair, you may need to reset to factory settings.

8. Alternative charging methods

If standard charging is still slow, try alternative methods:

Wireless charging:

• ⚡ Supported by Xiaomi Mi models 9/10/11, Redmi K50 newer.
• 📌 Speed: up 30W (Mi 11 Ultra, but usually 10–15W.
• ⚠️ Warning: wireless charging heats your phone more than wired charging. Do not use it in high ambient temperatures.

Charging from USB-port:

• 💻 Speed: 0.5–1A (Very slowly, but it will be fine as a last resort).
• 🔌 Use the port. USB 3.0 (blue connector) - it gives a little more current.

Power Bank with Quick Charge support:

• 🔋 Choose models with power output 18W and above (e.g. Xiaomi Power Bank 3 Pro).
• 📱 Connect through the original Xiaomi cable.

If neither method helped, it may be time to consider replacing the battery or even smartphone.Modern Xiaomi models (like the Redmi Note 12 Pro+) support 120W charging, allowing you to fill the battery in 15-20 minutes.

FAQ: Frequent questions about Xiaomi's slow charging