Introduction: Why does Xiaomi have a two-lightning icon?
You plugged a Xiaomi smartphone into a charger, but instead of the usual single-lightning battery icon, two lightning bolts are displayed on the screen? This symbol can be puzzling — especially if you haven't seen it before. In fact, this icon doesn't always signal a malfunction. It usually indicates a fast-charging mode, but in some cases it can talk about problems with the battery, cable or adapter.
In this article, we’ll go into detail about what a two-lightning icon on Xiaomi means when it appears normal and when it requires attention. You’ll also learn how to distinguish between a regular job and a failure, and what to do if charging is not right. Information is relevant for all modern models, from the budget Redmi Note to the flagship Xiaomi 14.
Before you panic, check that your phone may just be using Quick Charge or Turbo Charging technology, and there's no problem, but if you notice a slow charge, overheating or percentage spikes with two lightning bolts, that's a reason to go deeper.
What does the two-lightning icon on Xiaomi mean?
The dual-lightning icon on the lock screen or in the status bar of Xiaomi is a visual confirmation that the smartphone is charging in accelerated mode. Depending on the model and version of MIUI, the value may vary slightly, but in 90% of cases it is the following:
- 🔌 Quick Charge (Quick Charge, Turbo Charge, HyperCharge) is activated. The smartphone recognizes the compatible adapter and automatically switches to accelerated mode.
- ⚡ It uses a proprietary protocol (e.g. Mi Fast Charge or Mi Turbo Charge for flagships), which means that the charger supports Xiaomi technology.
- 🔋 The battery is discharged to a critical level (less than 15%), and the system temporarily speeds up charging for quick recovery.
- ⚠️ Problem with cable or adapter (less commonly) If two lightning flashes or appear chaoticly, it may indicate an unstable power supply.
For example, on the Xiaomi 13 Pro with support for 120W HyperCharge, two lightning bolts burn constantly when using the original charger, and on the Redmi Note 12 with 33W Pro, they can only appear in the first 10-15 minutes of charging until the battery reaches 50-60%.
It is important to understand that two lightning ≠ If you use a non-original cable or adapter with questionable specifications, your smartphone may mistakenly recognize them as "fast", which leads to overheating or accelerated wear and tear of the battery.
When is two lightnings normal?
In most cases, the appearance of two lightning bolts on Xiaomi is a regular situation that does not require intervention.
- It uses the original charger with Quick Charge 3.0/4.0 or Xiaomi proprietary technologies (for example, Mi Turbo Charge 30W/67W/120W).
- The battery is discharged to 0-20%, and the smartphone automatically speeds up charging for quick recovery.
- The “Fast Charging” mode is enabled in the settings (Settings → Battery → Charging settings).
- New phone or after reset – in the first few charging cycles, the system can test compatibility with the adapter.
For example, if you plugged in the Xiaomi 12T Pro to charge 120W, two lightning bolts will burn all the time and the battery will charge up to 100% in 19-25 minutes.
Another nuance: on some models (such as the POCO F4 GT), two lightning bolts can only appear when the phone is actively used while charging (games, video calls), which is due to the system temporarily increasing power to compensate for power consumption.
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To check the actual charging speed, install the AccuBattery app (available on Google Play) that will show current (in mA) and voltage, which will help distinguish real fast charging from simulation.
When are two lightning bolts a sign of a problem?
If the two-lightning icon appears unpredictably or is accompanied by other symptoms, it may indicate a malfunction.
- 🔥 Overheating of the shell (more 40-45°C) — especially in the battery or charging port area.
- ⏳ Slow charging despite two lightning bolts (e.g. 1% in 10 minutes).
- 🔄 Rise of interest (the battery is charged, then discharged by itself).
- ⚡ Lightning flashes or disappears at the slightest movement of the cable.
- 🚫 Charging is interrupted with the error "Charger is not supported".
The causes of such problems can be different:
| Symptoms. | Possible cause | Decision |
|---|---|---|
| Overheating + two lightning | Unoriginal adapter with overpower or damaged cable | Use the original charging, check the cable for damage |
| Slow charging despite two lightning bolts | Battery wear, USB-C port contamination, software failure | Clean the port, check the battery health in Settings → Battery |
| Lightning flashes | Poor contact in the connector or damaged cable | Try another cable, clean the port with compressed air |
| Percentage spikes in charge | Failure of the power controller or battery wear | Reset the battery settings or contact the service |
Critical: if two lightning strikes when charging from a PC or a weak adapter (5W), it almost always indicates a malfunction of the power controller, in which case the phone may fail, it is better to turn it off and check in the service center.
What if the phone doesn’t turn on after two lightning strikes?
How to check if the real fast charging?
Sometimes two lightning bolts on the screen are just a visual hoax: the phone shows the accelerated charging icon, but the power is actually low. To make sure everything is working correctly, follow these steps:
Install the AccuBattery or Ampere app
Connect the original charger
Launch the application and check the charging current (should be ≥1500mA for fast charging)
Compare it to your model’s passport details (e.g., Redmi Note 12 Pro+ should show ~3000-3500mA at 67W)
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Normal indicators for popular Xiaomi models:
- Redmi Note 11/12 (33W) - 2000-2500 mA.
- Xiaomi 12T/POCO F4 GT (67W) is 3000-3800 mA.
- Xiaomi 13 Pro / 14 Pro (120W) – 4500-5000 mA.
If the actual current is significantly lower (e.g., 500-800 mA at two lightning bolts), this means that:
- You are using a non-original high-resistance cable.
- The adapter does not support the declared power (Chinese fakes often understate the parameters).
- The USB-C port is contaminated or damaged.
- In the settings, the option Fast Charging is disabled (check Settings → Battery).
On some firmware (e.g. MIUI 14 for the global version), two zippers can be displayed even when charging from USB 2.0 (500 mA).
How to fix problems with two lightning?
If you are convinced that two lightning strikes are not just because of a failure, follow this troubleshooting instruction:
1.Check the charger and cable
In 70% of cases, the problem lies in non-original accessories.
- 🔌 Use only the original adapter from Xiaomi (the box should be marked with a marking) MDY-12-XX fast-charging).
- 🔗 Check the cable for damage (bending, bare wires) The best way to work with a proprietary cable. USB-C to USB-C.
- 🔄 Try another charger with the same power (e.g., from a different charger) POCO Realme, if it supports Quick Charge).
2. Clear the USB-C port
A contaminated connector can cause unstable contact, causing the phone to mistakenly recognize the charging mode.
- Turn off the phone.
- Use a wooden toothpick or plastic shoulder blade to remove dust.
- Blow the port with compressed air (a canister for cleaning equipment).
- Do not use metal objects – they can damage your contacts.
3. Update firmware
Some versions of MIUI (especially MIUI 12.5 and MIUI 13) had bugs that displayed the charging icon. Updating to the latest version often solves the problem:
- Go to Settings → About the phone → System update.
- Click Check Updates and install available patches.
- After the update, reboot.
4.Reset the battery settings
If the smartphone does not correctly determine the type of charging, resetting the battery calibration will help:
- Go to Settings. → Battery.
- Click on the three dots in the top right corner and select Reset Battery Settings.
- Confirm the action and restart the phone.
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If after all the manipulations, the two lightning bolts continue to blink or the charging goes wrong, the problem may be in the power controller or the battery itself, in which case a diagnosis is required at the service center.
Frequent questions about two lightning bolts on Xiaomi
Why do my Xiaomi only get two lightning bolts sometimes?
Can I turn off the two lightning displays?
Why do two lightning strikes, but the phone charges slowly?
Is it dangerous if two lightning bolts are constantly burning?
How do I know which charging is supported by my Xiaomi model?
Conclusion: What do you remember?
Two zippers on Xiaomi’s screen when charging is not a bug, but an indicator of accelerated mode. In most cases, it appears when you use a compatible charger, and that’s good: your phone charges faster. However, if the icon is accompanied by overheating, slow charging or other anomalies, it’s worth checking the accessories and settings.
Key findings:
- ✅ Two lightnings. = fast charging (unless there are other problems).
- ⚠️ Lightning flashes or overheating - a sign of malfunction.
- 🔧 Always use original cables and adapters.
- 📱 Update the firmware – this fixes the bugs with the charging display.
If after all the checks the problem remains — do not risk, contact the service center Xiaomi. Modern smartphones are sensitive to the quality of power, and it is better to be safe than face a serious breakdown.
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Never use chargers with higher power than claimed for your model (e.g. 120W for Redmi Note 11, which only supports 33W).This could damage the battery or power controller!