Xiaomi is slowly charging: reasons and solutions for fast charging

Why Xiaomi is charging too long: the main reasons

Did you connect a Xiaomi smartphone to charge, but the percentage of the battery crawls like a turtle? The problem of slow charging is familiar to many users of Redmi, POCO and Mi. In some cases, the phone can charge 2-3 times longer than usual - instead of 1-1.5 hours, the process stretches by 4-5.

The first thing to understand is that charging speed depends on three key factors: adapter power, battery status, and temperature. If any of these are disrupted, charging time increases, for example, using a non-original cable can reduce power from 33W to 10W, and overheating the battery causes the system to artificially limit current.

In this article, we will look at all possible causes, from the banal (dirty connector) to the serious (battery wear), and give step-by-step instructions to fix the problem. Particular attention will be paid to models with support for fast charging (Redmi Note 12 Pro+, POCO F5 Pro, Xiaomi 13T), where the speed drop is most noticeable.

1.Check the charger and cable

To start with, the most obvious is the charging kit. Even if you use the original Xiaomi adapter, it can lose power over time due to wear and tear on the internal components, and uncertified charging often fails to deliver the 18W, 33W or 67W claimed.

How do you check?

• 🔌 Connect the charger to another device (for example, to the POCO X5 If the speed is also low, the adapter is a problem.
• ⚡ Use the AccuBattery app (available on Google Play) to measure real-world charging power.For Xiaomi 12T supportive 120W normality 80–100W first 30 minutes.
• 🔄 Try another cable. Even the original cable. USB-C It may be damaged after 6-12 months of active use.

If you use wireless charging, consider that its maximum power is usually 10-15W (even flagships like the Xiaomi 13 Ultra), which is 2-3 times slower than wired charging.

2. Clean the USB-C connector from dust and debris

A contaminated USB-C connector is one of the most common causes of slow charging, and dust, pocket pile, or contact oxidation impair the connection, making it impossible for the phone to get full power, especially for low-pressure models (Redmi 9A, POCO M4 Pro).

How to clean the connector:

1. Turn off the phone and get it out. SIM-card (if it interferes with the).
2. Take a wooden toothpick or plastic spatula (NOT metal!) carefully remove visible debris.
3. For deep cleaning, use isopropyl alcohol (90%+) and a cotton swab. Drink it with alcohol, squeeze it and wipe the contacts.
4. Let the connector dry for 10-15 minutes before connecting the charging.

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Do not use compressed air to clean the connector – this can drive the dust deeper or damage the microphone (located next to USB-C on most Xiaomi models).

If the speed has not recovered after cleaning, check the connector for physical damage (bent contacts, corrosion marks), in which case repair will be required at the service center.

3. disable functions that consume energy during charging

Many users don’t know that using your phone while charging can reduce its speed by 30 to 50 percent, for example, if you play Genshin Impact or watch 4K video on the Xiaomi 12 Pro, the processor and screen consume so much power that the battery barely charges.

What to turn off:

• 🎮 Close all games and resource-intensive applications (PubG Mobile, Call of Duty, Lightroom).
• 📶 Turn off the mobile internet (especially) 5G) And Wi-Fi, if you don't use it, and data in the background eats up 10 to 15 percent of charging.
• 🔦 Reduce screen brightness to 30-50% or turn on Dark Theme (in Screen settings) → Dark subject).
• 📍 Turn off geolocation and Bluetooth if you don’t need them.

To maximize charging speed, put your phone into flight mode (Settings → Flight Mode) and this will turn off all radio modules, and the battery will charge 20 to 30% faster.

4. Check the status of the battery

If your Xiaomi is 1.5-2 years old, the problem may be battery degradation. Lithium polymer batteries lose capacity over time: after 300-500 charging cycles, their wear reaches 20-30%, and after 800 cycles - 50% or more. This not only reduces the time of operation, but also slows down the charging.

How to check the wear of the battery:

1. Install the AccuBattery app (free on Google Play).
2. Charge the phone to 100% and discharge to 0% (calibration).
3. In Health, look at Capacity, and if it's below 80 percent of the factory value, you should change the battery.

If the battery capacity is below 70% and the phone runs out in a few hours, replacing the battery will be the only solution. In official Xiaomi service centers, the replacement cost for the Redmi Note 11 is about 2000-3000. ₽, for flagships (Xiaomi 13) – 4000-6000 ₽.

5. Update the firmware and reset the charging settings

Sometimes slow charging is due to software failures in the MIUI firmware. For example, in some versions of the Redmi Note 10 Pro, there was a bug that caused the phone to limit charging current to 10W regardless of the adapter.

How to update firmware:

1. Go to Settings → About the phone → System update.
2. Click Check Updates and install the latest version of MIUI.
3. After the update, restart the phone.

If the update didn’t help, try resetting your charging settings:

1. Open Settings → Battery and Performance.
2. Select Battery Settings → Reset charging settings (not available on all models).
3. Confirm the reset and restart the device.

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If the charging is still slow after the upgrade, try rolling back the firmware to the previous version (via Fastboot or Recovery). 4PDA or XDA-Developers.

For advanced users, if the smartphone is rooted, you can manually change the charging settings through the engineering menu.

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Then go to the Battery Information and check the current charging current (AC current). The norm for 33W is 3000-4000 mA.

6. Check the temperature of the phone

Overheating is the main enemy of fast charging. If the battery temperature exceeds 40-45 ° C, Xiaomi’s system automatically reduces the current to avoid damage.

• 🔥 Charging under direct sunlight.
• 🎮 Games or video rendering while charging.
• 🚗 Finding your phone in a closed car in the summer.
• 🔋 Use of a faulty adapter (the power supply itself is overheated).

How to check the temperature:

1. Install the AIDA64 app (Sensors section).
2. Connect the charging and monitor the battery temperature.
3. If the value is above 40 ° C, let the phone cool for 15-20 minutes.

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To speed up cooling, remove the case (especially silicone or thick) and place the phone on a flat, cool surface (not in the fridge!).

Some models (POCO F4 GT, Black Shark 5) have a built-in cooling system with a fan, if it is clogged with dust, efficiency drops.

7. disable charging optimization (for older models)

Some Xiaomi smartphones (e.g. Mi 9, Redmi K20 Pro) have Optimized Charging feature that artificially slows the process after 80% to extend the battery life.

How to turn it off:

1. Go to Settings → Battery and Performance.
2. Select Battery Settings → Optimized Charging.
3. Turn off the slider or set a schedule (for example, only at night).

On the newer models (Xiaomi 13, Redmi Note 12), this feature is called Adaptive Charging and works on the same principle. It is not recommended to turn it off constantly, it will reduce the battery life.

8. Check the phone for viruses and background processes

Viruses and malicious applications can not only steal data, but also consume CPU resources in the background, which leads to overheating and slow charging, especially if you installed APKs from unverified sources.

How to check:

1. Install an antivirus (Malwarebytes or Dr.Web Light)
2. Scan the system for threats.
3. Check the list of running apps in Settings → Apps → Launched. Close suspicious ones.

Also worth paying attention to is autoboot, because many apps (especially Chinese ones) are added to autorun and consume energy even when not in use.

1. Go to Settings → Applications → Autostart Management.
2. Turn off autoplay for unnecessary programs (e.g. Mi Video, Mi Browser, if you are not using it).

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If the charging speed has recovered after cleaning the viruses, be sure to remove suspicious apps and do not install APKs from unknown sources.

FAQ: Frequent questions about Xiaomi's slow charging

⚠️ Warning: If after all the checks Xiaomi is still charging slowly, and the battery is swollen or the phone turns off when you connect the charge - immediately disconnect it from the network and contact the service center.

⚠️ Warning: Never use damaged cables (with bare wires, rubbed insulation) or adapters with visible traces of melting, which can cause fire or motherboard failure.