Why Mi 8 Lite doesn’t always charge fast
Xiaomi Mi 8 Lite is one of the most popular mid-range smartphones from Xiaomi, Released in 2018. Despite the support of Quick Charge 3.0, many users are faced with the fact that the device charges longer than expected, the reason lies not only in the settings, but also in the components: the wrong charger, damaged cable or even the features of the MIUI firmware.
In this article, we’ll look at all the ways to enable fast charging on the Mi 8 Lite, from basic settings to hidden engineering menu features, how to check for Quick Charge support, what accessories to use, and what to do if your smartphone stubbornly ignores the accelerated charging feature. We will pay special attention to the common myth of the “hidden setting” in the MIUI, which supposedly needs to be activated manually - let's figure out where the truth is, and where the fiction is.
Before you get to the instructions, make sure your Mi 8 Lite doesn't overheat while charging.If the case is hot (above 40°C), the system automatically limits current - this is a protective measure, not a breakdown.
1. Check Quick Charge support on Xiaomi Mi 8 Lite
Not all versions of the Mi 8 Lite work equally well with fast charging. Officially, the device supports Quick Charge 3.0, but there are nuances:
- 🔋 Model with Snapdragon 660 processor (main version) - full support QC 3.0.
- 🔋 Modifications for some regions (e.g. India) may have reduced functions due to local standards.
- 🔋 Firmware MIUI 10.2 may not correctly recognize compatible chargers.
To find out the exact processor model and firmware version:
- Open the Settings. → The phone.
- Scroll to the MIUI version and the CPU model.
- If you have a Snapdragon 660 and a MIUI 10.2+, fast charging should work out of the box.
Also check the serial number on the box or in settings (Settings → Phone → General information).If it starts with M1808, you have a standard version with QC 3.0 support. Options with M1805 (for China) may have limitations.
2.The right accessories: what charger and cable are needed
Even if the Mi 8 Lite supports Quick Charge 3.0, without the right accessories, the feature will not work.
| Component | Minimum requirements | Recommendations |
|---|---|---|
| Charger | Quick Charge 2.0/3.0 or Power Delivery (PD) | Original Xiaomi 18W (MDY-08-EM) or certified analogues (Anker, Baseus) |
| Cable | USB Type-C with 5A support (thick veins) | Original cable from the kit or certified USB 2.0 Type-C with the marking 5A |
| Phone connector | Clean USB-C port without oxidation | Clean the port with a wooden toothpick soaked in alcohol (not metal objects!) |
⚠️ Caution: Cheap cables with thin wires (e.g., a set of wireless headphones) can limit current to 0.5–1A, Even if the charger supports QC. This is one of the most common reasons for slow charging".
How to check the cable:
- 🔍 Look at the markings near the connector - it should be indicated 5A or 3A.
- 🔍 Connect the cable to the PC: if the data transfer speed is below 480 Mbps (USB 2.0), low quality cable.
- 🔍 Try charging another phone with QC — If it's slow, the cable is the problem.
💡
If you don’t have the original RAM, use Samsung’s Adaptive Fast Charging chargers – they’re QC 3.0 compatible.
3. Enabling fast charging in MIUI settings
Unlike Xiaomi’s flagship models, where fast charging is automatically enabled, the Mi 8 Lite sometimes requires manual activation.
- Go to Settings → Battery and Performance.
- Select Battery Settings → Quick Charging.
- Activate the switch Enable fast charging (if any).
⚠️ Note: In some versions MIUI (particularly 10.x) This may not be there! This doesn't mean that fast charging is off, it's just that the system controls it automatically. If there's no switch, move to the next partition.
Also check the energy saving mode:
- 🔋 B Settings → Battery shut down Super Energy Saving and Ultra Energy Saving.
- 🔋 B Settings → Additionally. → Special features make sure that not activated mode to save charge.
If the charging is still slow after this manipulation, the problem may be hidden in the background, close all applications (especially instant messengers and games) and repeat the test.
Make sure the Fast Charging switch is on (if any)
Disconnect power saving modes
Close the background applications (especially games)
Use the original cable and the zoo
Check the temperature of the phone (not higher than 35).°C)-->
4. Hidden settings: engineering menu and ADB commands
If standard methods do not help, you can try to activate fast charging through the engineering menu or ADB. These methods are suitable only for experienced users - incorrect actions can lead to a firmware failure.
Method 1: Engineering menu
- Open the Phone app and enter the combination: ##4636##.
- Go to the section Information about the battery.
- Check the Charging Technology line – if Quick Charge 3.0 is specified there, the function is active.
- If it says Standard, try connecting another charger.
Method 2: ADB-teams (requires PC)
- Install ADB Tools on your computer.
- Turn on USB Debugging on your phone (Settings → About Phone → MIUI version – tap 7 times, then go back to Additional → For Developers).
- Connect your phone to your PC and execute the command: adb shell settings put global fast_charge 1
- Reset the device.
⚠️ Attention: After use ADB Check the stability of the phone. If you have lags or overheating, return the setting with the command:
adb shell settings put global fast_charge 0What to do if the engineering menu is not opened?
Frequent problems and their solutions
Even after all the settings, fast charging may not work, and let's look at the typical scenarios and how to fix them:
| Problem. | Possible cause | Decision |
|---|---|---|
| Charging is only going on 5W. | Unoriginal cable or ZU | Replace the accessories with certified |
| The phone only charges up to 80% fast. | Optimized Charging (MIUI 12+) is activated | Turn off the settings → Battery → Battery settings |
| Charging is interrupted | Poor contact in the connector or oxidation | Clean the port with alcohol, try another ZU |
| The phone is warming up and slowing down. | High ambient temperature or background processes | Refrigerate your phone, close your apps |
If none of the methods worked, check the status of the battery:
- 🔋 Install the AccuBattery app (from Google Play) and check battery health.
- 🔋 If the capacity has fallen below 80% of the factory, the battery is worn out and requires replacement.
- 🔋 Check out the discharge chart – if the phone loses charge too quickly, the battery is the problem.
It is also worth upgrading to the latest version of MIUI. In older versions (below 11.0) there were bugs with the recognition of chargers.
💡
If the phone charges quickly only when it's off, the problem is probably the firmware or the battery that's worn out, and the device on uses more power, and the low RAM doesn't have time to make up for the cost.
6. Alternative methods of accelerating charging
If standard fast charging doesn’t work, alternatives may be tried, but they won’t replace Quick Charge 3.0, but they will help reduce charging times.
- ⚡ Airplane mode: Disables all wireless modules, reducing power consumption.
- ⚡ Disconnect Sync: Go to Settings → Accounts and temporarily disable automatic synchronization.
- ⚡ Use of Power Delivery (PD): Supported chargers PD 18W+ (MacBooks can provide more power than the QC.
- ⚡ Cooling the phone: Put the device on a metal surface or use a cooling stand.
You can also try custom firmware, such as LineageOS or Pixel Experience. They often optimize power management better, but require unlocking the bootloader and may be unwarranted. Read more about firmware in our article "How to install custom firmware on Xiaomi."
If you often charge your phone on the go, consider buying a powerbank with Quick Charge support.
- 🔋 Xiaomi Mi Power Bank 3 Pro (30W, QC 3.0)
- 🔋 Baseus 65W (PD + QC, 2 ports)
- 🔋 Anker PowerCore 26800 (30W, QC compatible)
Remember, the higher the capacity of the powerbank, the longer it will charge itself. The best option for the Mi 8 Lite is a 10,000-20,000 mAh battery with 18W+ support.