Why does Xiaomi’s smartphone take too long to charge?
Did you plug the Xiaomi Redmi Note 12 into charging, but after an hour, the battery barely reached 30%? Or does your POCO F5 warm like an iron and the percentage of charge creeps at the speed of a turtle? The problem of slow charging is familiar to many owners of Xiaomi smartphones — and the reasons are not always obvious. It may be in the unoriginal cable that “strangles” current, in the background processes that devour energy faster than it comes in, or even in the hidden settings of MIUI, which artificially limit speed.
In this article, we’ll look at all the ways you can speed up charging on Xiaomi, from basic (power check) to advanced (change settings through the engineering menu). Importantly, some methods require root rights or are risky for the battery. We’ll mark them separately so you can assess the risks.
1.Check the charger and cable
The first thing you need to do is eliminate hardware problems, and even if you're using Xiaomi's "native" power supply, it could have malfunctioned.
- 🔌 Power supply: For Xiaomi 13 Pro with support 120W HyperCharge is the original adapter 20V/6A. If you have a block from the old Redmi 5 (5V/2A), charging speed will fall in 5-6 once.
- 🔗 Cable: Cheap cables often have thin veins that can't withstand high currents.The original Xiaomi cable is labeled as USB-C to USB-C (for fast charging) or USB-A to USB-C (standard).
- 🔋 Port port USB on a smartphone: Dust, moisture or mechanical damage can worsen contact. Blow the port with compressed air (no alcohol!).
How to check quickly? Connect your smartphone to another power supply (e.g., from a USB-PD-enabled laptop) and observe the charging speed in Settings → Battery. If the percentage is growing noticeably faster, the problem is charging.
⚠️ Warning: Never use power supplies with damaged insulation or melted contacts, which can short circuits and even fire!
2. Optimize the MIUI settings for charging
MIUI firmware (especially versions 13-14) has hidden features that can artificially limit charging current.
- 📱 Turn off Adaptive Charging: Go to Settings → Battery → Battery settings and deactivate the option.It slows charging after 80% to "extend battery life".
- ⚡ Turn on Fast Charging: In the same menu, check if the Fast Charging option is activated. On some models (such as the Mi 11 Ultra), it turns off after the updates.
- 🔄 Resetting battery settings: In Settings → Annexes → Application management → Three points. → Reset application settings select Reset battery settings. This will clear the power cache.
For advanced users: if your smartphone supports HyperCharge (e.g. Xiaomi 12T Pro), but charging is slow, check the battery temperature. When heating above 40°C, the system automatically reduces current. Use the AIDA64 app (Sensors section) to monitor.
Check the power supply (should be ≥30W for fast charging)
Use the original USB-C cable
Turn off adaptive charging in MIUI settings
Close all background apps (especially games and social media)
Remove the case if the smartphone overheats-->
3. Close energy-intensive applications
If you're playing Genshin Impact while charging or streaming 4K video, the battery can run out faster than it charges. Here's how to fix it:
- 🎮 Games: Close all games through recent apps (swipe up).Even in a folded state they consume up to 15-20% charge-hour.
- 📱 Social media: TikTok, Instagram and Telegram are actively using background processes. disable auto-update in their settings.
- 📡 Mobile Internet/Wi-Fi: Turn off data transmission during charging. Constant sync (e.g. Google Photos) slows down the process.
Check your energy consumption in real time: Settings → Battery → Battery Use. If an app eats up >5% per hour, remove or limit its activity.
💡
Create a MIUI Energy Saving profile and activate it while charging, which will turn off background activity and speed up the process by 20-30%.
4. Check the battery's health
Over time, the battery capacity decreases and it starts to charge more slowly.
- Check through MIUI: Go to Settings → Battery → Battery status. If the capacity has dropped below 80% of the original, it is time to change the battery.
- Testing with AccuBattery: Install the app from Google Play and check the battery health setting. <70% critical.
On new smartphones (such as Xiaomi 14), the problem may be calibrating the charging controller. Try to completely discharge the device (before turning it off), then charge to 100% without interruption. Repeat the procedure 2-3 times.
| Battery status | Capacity from reference | Charging speed | Recommendations |
|---|---|---|---|
| Excellent. | 90-100% | Normal. | Maintain a temperature of 10-35°C |
| Good. | 80-89% | Decreased by 10-15% | Use the original charging |
| Satisfactory | 70-79% | Reduced by 30-40% | Limit fast charging |
| Critical | <70% | Very slow. | Battery replacement is mandatory |
⚠️ Warning: If the battery is heated above 45°C during charging, this is a sign of degradation of the elements or a malfunction of the controller.Continued use may lead to fire.
5. Advanced methods (for experienced users)
If the standard methods don't work, you can try to change the parameters of the system. These methods require caution!
How to turn on the engineering menu on Xiaomi
- 🔧 Changing the charging limits through ADB: adb shell dumpsys battery set ac 1 This command compulsorily enables fast charging (required) USB-debugging).
- 📉 Disabling optimization MIUI: adb shell settings put global fast_charge_force_enable 1 Reset the firmware's limitations on current.
- 🔄 Resetting of the power controller: On some models (e.g, POCO X3) Helps reset via Test Menu (code #36446337##).
Warning: the wrong ADB commands can knock your smartphone out. If you're not sure, don't experiment. For models with Qualcomm Snapdragon (like the Redmi K50), you can use the QPST utility to fine-tune charging parameters, but that requires deep knowledge.
💡
Before use ADB-commands to back up the data. A code error can cause a device to reset or "brick.
6. When is it time to bring it to the service?
If you’ve tried everything, but Xiaomi still charges for 3-4 hours, the problem may be:
- 🔌 Faulty power controller (chip on motherboard) Symptoms: smartphone does not detect charging or charges only when switched off.
- 🔋 Bloated battery (even if not visually visible) Signs: the body "plays" when pressed, the battery goes down in a few hours.
- 🔧 Damaged connector USB-C. Often occurs after falls or moisture.
The cost of repairs in official Xiaomi services (for 2026):
- Battery replacement: 1,500 to 4,000 ₽ (model-wise).
- Repair of the power controller: from 3 000 ₽.
- Replacement of the connector USB-C: 2,000 ₽.
If your smartphone is warranty, do not try to repair it yourself - this will void the warranty.