How to activate fast charging on Xiaomi: from settings to iron

Did you buy a new Xiaomi with fast charging support, but the smartphone is persistently charging "like old"? or did the MIUI update halve its speed? The problem is familiar to many owners of Redmi, POCO and Mi - even flagship models sometimes "slow down" charging due to software restrictions or incorrect settings.

In this article, we will analyze all the ways to unlock the maximum speed: from basic checks (cable, power supply) to hidden functions. MIUI We will pay special attention to models with Turbo Charge (for example, Xiaomi 13 Pro or other models). POCO F5), where the speed can vary by 2-3 times, and why fast charging sometimes automatically turns off when the battery is above 40°C – and how to get around it without risking the battery.

Spoiler: 80 percent of the time, it's 5 minutes to fix the problem -- just turn on a tick or change the cable, but if your Xiaomi is stubborn, we'll go through the complex scenarios, from resetting the power controller to firmware custom core.

1. Equipment check: power supply and cable

Before digging into the settings, make sure your charger is physically capable of delivering the declared power.For example, the Xiaomi 12T Pro supports 120W HyperCharge, but if you plug it into the power supply from the Redmi Note 10 (total 33W), the smartphone will automatically limit the current.

Here's what you need to check:

• 🔌 Power supply: The body must have Quick Charge markings 3.0/4.0+, PD (Power Delivery or power indication (e.g, 67W). Xiaomi’s original blocks are usually signed as Mi Charge Turbo.
• 🔗 Cable: Cheap cables often cut power. Use original cable from the kit or certified cable. USB-C to USB-C supportive 5A (model 100W+).
• 🔋 Port port USB: In some models (for example, POCO X3 Pro) fast charging only works through the bottom connector. Check if there is any dust or oxidation inside the port.

⚠️ Note: If you use wireless charging, maximum power is usually limited 30W (Always connect to the cable for full speed.

MIUI settings: where fast charging is enabled

In MIUI 12-14, the fast charging function can be disabled by default, especially on budget models (Redmi 10A, POCO M4 Pro).

1. Open the Settings. → Battery.
2. Slip on Charging (or Charging Settings on new versions).
3. Find the Quick Charge option (could be called Turbo Charge or Quick Charge) and turn on the switch.
4. On some models (Xiaomi 13 Ultra) will additionally appear the option Superfast charging – turn it on.

If the item is not on the menu, then your model does not support hardware fast charging (for example, Redmi 9A is limited to 10W).

Open Settings → Battery

Find the "Charging" or "Charging settings" section

Turn on the "Fast Charging" switch

Reboot your smartphone (if no changes are applied)-->

⚠️ Note: On some firmware (for example, MIUI Global for the European market) fast charging can be blocked due to certification, in which case changing the firmware region to China or India will help - but this requires unlocking the bootloader.

3. Software limitations: why Xiaomi is "slowing down" charging

Xiaomi artificially limits the charging speed in several cases:

• 🌡️ Overheating: If the battery temperature exceeds 40-45°C, the system reduces current to 5W. This is protection against battery degradation.
• 🔄 Charging cycles: After 500–800 full cycles (approximately 1.5–2 years of use), the controller begins to limit the maximum current.
• 🔒 Unoriginal accessories: MIUI recognizes left-handed power supplies and cables, forcibly reducing power.
• 📱 Background processes: If resource-intensive tasks (games, video rendering) are running during charging, the speed may drop by 30-50%.

To circumvent the restrictions:

1. Close all apps before charging (especially games and social networks).
2. Remove the cover - it can cause overheating.
3. Use Aircraft mode (disables communication modules, reducing heating).
4. For models with LiquidCool (Black Shark, POCO F4 GT) enable Performance → Cooling in the settings.

Resetting of the power controller and battery calibration

If the smartphone suddenly stopped charging quickly (for example, after an update or drop), the problem may be a failure of the power controller.

1. Turn off the phone.
2. Connect the original power supply.
3. Press Volume Up + Power for 10-15 seconds (before vibration).
4. Release the buttons and wait for the load.

For battery calibration (relevant in case of incorrect display of percentage of charge):

1. Discharge the smartphone to 0% and turn it off.
2. Connect to charging and do not turn on 8-12 hours.
3. After full charging, turn off the cable and turn on the phone.

⚠️ Note: Do not calibrate more than once every 3 months, which reduces battery life. Also avoid full discharge on models with Li-Po batteries (for example, Xiaomi). 11T Pro), as this accelerates degradation.

5. Firmware and modifications: when standard methods do not help

If you've tried everything, but the charging speed is still low, the problem may be in the firmware.

• 📲 Update. MIUI: Go to Settings. → The phone. → System updates. Sometimes charging bugs get fixed in newer versions.
• 🔧 Install a custom core: For example, FrancoKernel or Kirisakura for Xiaomi often optimize power management.
• 🛠️ Reverse to old firmware: If the problem appears after the update, go back to the previous version MIUI via Fastboot.
• 🔓 Unlock the bootloader: On some models (for example, POCO X3 NFC) Quick charging only works after unlocking.

⚠️ Attention: Installing custom firmware resets warranty and can lead to a device blink.Before experimenting, make a backup through TWRP Or Mi Flash Tool.

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Before you run your firmware, check the motherboard model! For example, the Redmi Note 10 Pro has two revisions (sweet and sweetin), and the firmware from one won't fit the other.

6. Hardware problems: when to carry in the service

If none of the methods worked, the cause may be a physical malfunction:

• 🔋 Battery wear: After 2-3 years, battery capacity drops by 30-50% and the controller limits current. Check wear using ##6484### (on the Battery health menu).
• 🔌 Damaged port USB-C: Oxidation or bent contacts slow down. Look at the port with a flashlight - if the contacts turn black, you need to replace them.
• 🔧 Faulty power controller: The chip may burn on the board (for example, BQ25890 Redmi Note 9 Pro is only available in the service.
• 🔥 Battery bloating: If smartphone case 'blown up', immediately disconnect it from charging! it's life-threatening.

Cost of repair:

• Battery replacement: 1,500–4,000 ₽ (model-wise).
• Port repairs USB-C: 1 000–2 500 ₽.
• Diagnostics of the controller: 500-1 500 ₽.

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If the smartphone doesn’t turn on after trying to charge fast, DO NOT TRY to charge it again! it could be a short circuit – carry to the service.

FAQ: Frequent questions about fast charging Xiaomi