Xiaomi is slowly charging: all the reasons and ways to eliminate

Xiaomi smartphones (including Redmi sub-brands and POCO) They're known for their value for money, but even they're not immune to charging problems — 4-6 hours instead of the stated 1-2 — It's not just an inconvenience, it's a signal of a possible malfunction. 80% In cases, the problem is solved on its own, without going to the service center, but to do this, you need to accurately diagnose the cause.

In this article, we will analyze all possible factors affecting the charging speed: from banal wear of the cable to hidden energy saving settings in the process of charging. MIUI. You will learn how to check each element of the charging circuit, what parameters are considered normal for different models, and what to do if the smartphone has stopped gaining interest at all. We will pay special attention to the software limitations that Xiaomi implements in the latest firmware versions – they are often overlooked even by experienced users.

Before you start diagnosing, ask yourself a simple question: How long have you been seeing a problem? If slow charging suddenly appears, it's probably a physical factor (cable, power supply, connector) that's at fault. If the smartphone has been charging slowly since birth, it's a matter of settings or model features, which will help narrow the search.

1. Checking the charger and cable: the main user errors

To start with, 9 out of 10 slow-charging problems are related to poor-quality or damaged accessories, and most users don’t even realize that their “original” cable is a fake from AliExpress, and the power supply only gives half of the declared power.

How do you check?

• 🔌 Use only original or certified accessories. For Xiaomi, these are labeled cables. MDY-11-ED (USB-C) or MDY-08-EG (Micro-USB) and Quick Charge-enabled power supplies 3.0/4+. Counterfeiting often has a thinner squirt and no hologram on the packaging.
• 📏 The length of the cable shall not exceed 1 The longer the cable, the higher the resistance and the loss of energy — 50-70 centimeter.
• 🔍 Check the connectors for physical damage, blackened or bent contacts in the USB-C port of the smartphone is a sure sign of oxidation, which inhibits charging.
• 📊 Check the power output of the power supply. For modern Xiaomi (e.g. Redmi Note 12 Pro)+ or POCO F5) minimum requirement — 33W. Old blocks on 10W They just can’t provide fast charging.

A simple test: connect your smartphone to another charger (like a laptop or tablet) If the charging speed has increased, the problem is in your power supply or cable. If not, look for the reason further.

Battery condition: how wear affects charging speed

Lithium-polymer batteries in Xiaomi smartphones degrade over time — this is a normal process. 300-500 charging cycles (about) 1.5-2 year of active use, the battery capacity falls on 20-30%, a) the charging speed may decrease in 2-3 The reason is the increased internal resistance of the elements.

How to check the status of the battery:

1. Go to Settings. → Battery → Battery status (available on MIUI 12 and newer).
2. Notice the Capacity parameter, if it's less than 80 percent of the original value, the battery needs to be replaced.
3. Use applications like AccuBattery (Android) for detailed diagnostics, which will show the actual charging speed in mA and the battery temperature.

Critical signs of battery wear:

• ⚡ The smartphone is charged only when turned off.
• 🔥 The body heats up strongly during charging (above 45).°C).
• 📉 The percentage of charge "jumps" (for example, from 30% immediately to 1%).
• ⏳ Battery life has decreased by 2 times compared to the new device.

Important, if the battery capacity fell below 70%, The smartphone is turned off when 20-30% The charge is not just a slow charge, but a critical malfunction that can cause the battery to bloat, in which case you need to immediately stop using the device and contact the service.

3. Programmatic limitations in MIUI: hidden settings that slow down charging

Many users do not know that MIUI (Xiaomi firmware has built-in charging limitation mechanisms to extend battery life.These features can be useful, but often work overly aggressively, reducing charging speeds to battery life. 5W instead of the stated 33W/67W/120W.

Where to look for these settings:

• 🛡️ "Battery protection” (Settings → Battery → Settings → If the function is enabled, the smartphone will charge more slowly after 80% or 90%.
• ⚡ "Fast charging" (Settings → Battery → Settings → Fast charging. Sometimes this option is reset after a firmware update.
• 🔄 "Adaptive charging (available on flagships like the Xiaomi 13 Ultra) analyzes your habits and artificially slows down charging at night.
• 📱 "Performance mode” (Settings → Special facilities → Performance mode: In Battery Saving mode, the charging speed is limited.

How to disable restrictions:

1. Go to Settings. → Battery → Settings.
2. Turn off the options "Battery Protection" and "Adaptive Charging".
3. Turn on "Fast Charging" (if available).
4. Set the performance mode to "Balanced" or "Performance".

If you don't get faster after this manipulation, the problem goes deeper, maybe it's the firmware or the hardware malfunction.

4.The Impact of Firmware and Updates: Why Xiaomi Charges Slowly After the Update

Updates MIUI It's not always good. Often, after installing a new version of the firmware, users notice that the smartphone has started charging in the past. 2-3 It's a little slower. It can be different:

• 🐛 Energy consumption bugs (e.g. in the MIUI 14.0.3 was a known bug with a charging current restriction on the POCO F4 GT).
• 🔒 New restrictions from Xiaomi (in the latest firmware versions, the company added a forced current limit for batteries with a capacity below 85%).
• 📱 Conflict with custom settings (if you have previously changed the parameters through the ADB magisk).

How to check the impact of the firmware:

1. Find out the current version of MIUI in Settings → About Phone → MIUI version.
2. Check the reviews of your version on the forums (for example, 4PDA or XDA If other users complain about slow charging, the problem is the firmware.
3. Try to roll back to the previous version (if available) or wait for a patch.

If you are sure that the problem is in the firmware, you can try resetting the settings to the factory:

1. Make a backup copy of the data.
2. Go to Settings → About the phone → Reset settings.
3. Select “Reset All Settings” (not to be confused with “Delete All Data”).

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Before resetting the settings, write down IMEI To do this, dial *#06# in the phone application, which will help restore access to the network if you have problems after resetting.

5. Physical damage: connector, charging controller, charge

If all software methods have been tried and the smartphone still charges for more than 3 hours, it's time to check the hardware.

1. Connector. USB-C/Micro-USB

• 🔍 Check the connector for bent contacts or debris, often with cloth fibres or dust.
• 🧲 Use a toothpick or plastic spatula to clean the connector gently. Do not use metal objects!
• 🔌 Check if the cable is wobbling in the connector. If so, it's a sign of wear and tear on the soldered contacts.

2. Charging controller

This is a chip on the motherboard that regulates the charging current, and it's a malfunction.

• ⚡ The smartphone is charged only when turned off.
• 🔄 The swelling is going to stop (it will stop).
• 📉 Charging speed drops after 50-60%.

3. Damage to the motherboard

If the smartphone fell or came into contact with moisture, the power tracks could be affected, and only a multimeter diagnostic at the service center would help.

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If your smartphone doesn't charge at all or shows "Charge suspended" -- it's almost always a hardware problem. Don't try to disassemble the device yourself, because 90 percent of the time, it causes more damage.

External factors: temperature, background processes, accessories

Sometimes slow charging is not connected to the battery or the firmware.

Ambient temperature

• ❄️ Temperatures below 0°C lithium polymer batteries are practically not charged.
• 🔥 At temperatures above 40°C system artificially restricts current for safety.
• 📱 Optimal range for charging: 10°C — 35°C.

Background processes

If you are:

• 🎮 Genshin Impact (Call of Duty Mobile).
• 📷 Recording video in 4K.
• 🔄 Updating an application or system.

All the current is used to power the processor, not to charge the battery. In extreme cases, the battery may even be discharged despite the charger connected.

3. Covers and accessories

Thick covers (especially those with metal inserts) can:

• 🔥 Deteriorate heat sink, causing overheating.
• 📶 Block the signal NFC or Qi (for wireless charging).
• 🔌 Press the connector, breaking contact.

A simple test: remove the case and put the smartphone on a flat surface, and if the charging speed has increased, the accessory is a problem.

7. Charging speed comparison on Xiaomi models: what is considered the norm

Not all Xiaomi smartphones charge at the same speed, and the table below shows the real-world performance of popular models (using the original charger and cable):

If your smartphone is charged longer than the specified time 30% — This is a diagnostic reason. 11 Pro+ should be charged 25-30 minutes, and if the process takes 1.5 One hour, something is clearly wrong.

8.When to contact the service: signs of serious malfunctions

Not all problems can be solved by yourself. Immediately contact the service center if:

• 🔥 Smartphone is very warm (above 50)°C) even without loading.
• 💥 The battery swelled (the body deformed, the screen "raised").
• ⚡ Charging is only in a certain position of the cable.
• 📵 The smartphone does not turn on or immediately turns off after disconnecting from charging.
• 🔋 In Settings → The battery displays a message saying "Replace the battery".

The cost of repairs in official Xiaomi service centers (for 2026):

• Battery replacement: 1,500 to 4,000 ₽ (model-wise).
• Repair/replacement of the connector USB-C: 1 200 — 2 500 ₽.
• Diagnostics of the charging controller: 500 - 1000 ₽.
• Replacement of motherboard: 5,000 - 15,000 ₽ (Unprofitable for budget models).

⚠️ Attention, if you notice that the battery is swelling, don't try to charge the smartphone. Lithium polymer batteries in this state can ignite.

For warranty devices, repairs will be free, but only if the problem is not caused by mechanical damage (falls, moisture).

1. Make a backup of the data (warranty repairs may include resetting settings).
2. Make sure there are no autopsy marks on the case (this voids the warranty).
3. Take a case and charger with you - the wizard can request them for diagnosis.

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Xiaomi’s official service centers in Russia are open by appointment. Check the address and opening hours on the site before visiting. mi.com/ru/service.

FAQ: Frequent questions about Xiaomi's slow charging