Two lightning on the screen Xiaomi Redmi when charging: decryption and problem solving

Why do Xiaomi Redmi have two lightning bolts when you connect a charger?

You plugged a Xiaomi Redmi smartphone into a charger, but instead of the usual battery icon, two lightning bolts appeared on the screen — what does that mean? — this symbol often causes confusion among users, especially if it wasn't there before. In fact, double lightning is not a bug, but an indicator of a special charging mode that can speak to both normal operation and hidden problems.

In most cases, two lightning signals that the smartphone has switched to accelerated charging mode (for example, Quick Charge or Turbo Charging). However, if this sign appears suddenly or is accompanied by slow charging, overheating, this is an occasion to check the accessories and settings. In this article, we will analyze all possible causes of dual lightning on Xiaomi Redmi, including the Redmi Note 10/11/12, Redmi 9/10 and others, and give step-by-step diagnostic instructions.

It is important to understand that the symbol may differ depending on the version of MIUI. For example, on old firmware instead of two lightning flashes displayed the icon “high-power charging”, and on new ones – animation labeled “Fast charging”. If your Redmi behaves unusually (for example, charges longer than usual), do not rush to panic – first rule out simple reasons.

What do the two lightning bolts on the screen Xiaomi Redmi: the official decoding

According to Xiaomi’s documentation, the two-lightning icon when charging indicates one of three states:

• 🔌 Activated fast charging mode – the smartphone has identified a compatible charger and uses Quick Charge technology, Power Delivery or proprietary Turbo Charging (available on models with support, for example, Redmi Note 11 Pro).+).
• ⚡ High-power charging – even if the power supply does not support fast charging, the system can temporarily increase current to speed up the process (for example, when the battery level is low).
• ⚠️ Non-standard charger warning – if the cable or adapter is not certified, the smartphone can show double lightning as a sign of “caution” by limiting current.

On Redmi models with MIUI 12/13/14, when you connect the original 33W charger and above, the inscription Turbo or Fast may appear next to the lightning. If you use a power supply from another manufacturer (for example, Samsung or Apple), the symbol can be displayed without text - this is normal, but the charging speed will be lower.

Interesting fact: on some devices (e.g. Redmi K50), double lightning flashes in the first 5-10 seconds after connection – this means that the system is testing the compatibility of the charger. If the blinking does not stop, this may indicate contact problems or a damaged cable.

When two lightning is normal and when not: the table of signs

To see if the appearance of double lightning is a regular situation or a signal of a problem, compare the behavior of your smartphone with the data from the table below.

If your Redmi falls into the "Requires attention" column, move to the next section with the diagnostic instructions, and if everything is normal, the double lightning just informs you that charging is going on at an accelerated rate, and there is nothing to worry about.

⚠️ Note: On Redmi Note 8 Pro and older, non-original chargers above 20W may fire current-limiting protection, in which case the double lightning will burn, but the actual charging speed will not exceed 10-15W.

Next Post:What to do if two lightning strikes suddenly

If you haven't seen double lightning on your screen before, and now it's constantly on the screen, follow these steps to identify the cause, start with the simplest tests and gradually move on to more complex ones.

Try another original cable (preferably from the set)

Connect your smartphone to another power supply (for example, from a laptop)

Check the USB connector on your phone for debris or damage

Reboot your smartphone and reconnect.-->

1. Check the compatibility of the charger. Make sure the power supply supports Quick Charge 3.0/4.0 or Power Delivery (for Redmi models with fast charging). If you use the left-hand charger, try the original. On some smartphones (for example, Redmi 10C), uncertified accessories can cause power failures.

2. Inspect the cable and connector. Damaged wires or oxidized contacts in the USB-C port often cause unstable charging. Carefully clean the smartphone connector with a wooden toothpick (don't use metal objects!). If the cable is bent, replace it - it can be dangerous.

3. Update the firmware. Some versions of MIUI have had bugs that display the charging icon. Go to Settings → About Phone → System Update and install the latest version of the software. After the update, restart the device.

4. Reset the battery settings. Sometimes the power controller malfunctions result in the incorrect display of the indicators.

Settings → Battery and Performance → Battery Settings → Reset Battery Statistics

5. Check the battery temperature. If the smartphone overheats, the system can artificially limit the current, resulting in double lightning without real acceleration. Use the AIDA64 or AccuBattery app to check the temperature. Normal to 40°C when charging.

⚠️ Warning: If after all the checks, the double lightning continues to flash and charging is extremely slow (less than 5% per hour), this may indicate a malfunction of the power controller or battery wear.

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If you have a Redmi Note 11 Pro+ or newer, try turning on Ultrafast Charging mode in your battery settings. Go to Settings → Battery → Charging settings → Ultrafast Charging and activate the option. This can fix the lightning display issues.

Xiaomi Redmi models, which are the most common double lightning

Not all Xiaomi Redmi smartphones display a dual-lightning icon, which depends on hardware support for fast charging and the MIUI version. Below is a list of models where this symbol is most common, as well as their features:

• 📱 Redmi Note 11 Pro/Pro+ — charge up 67/120 Watt, double lightning appears when using the original power supply.+ It can flash in the first seconds of connection.
• 📱 Redmi Note 10 Pro — fast charging 33 watts, the symbol is displayed only when charging from a compatible adapter. on non-original charges lightning may not appear, but the speed will be lower.
• 📱 Redmi 9/9A/9C — budget models with charging 10–18 Double lightning is rare here and usually signals problems with a cable or block.
• 📱 Redmi K50/K60 — flagship models with support 67–120 The lightning symbol may be accompanied by the words Turbo or Extreme.
• 📱 Redmi A1/A2 — The appearance of double lightning here almost always indicates a malfunction.

On Redmi models with MediaTek processors (for example, Redmi Note 12), double lightning can appear even when charging from the machine. USB-port of the computer, if the settings are enabled USB-It's not a bug, it's a firmware feature.

If your model is not listed, check its specifications on the official Xiaomi website or in the MIUI Settings app. Fast charging is available only on devices that support Quick Charge or Turbo Charging technologies.

Frequent User Mistakes: What NOT to Do When Two Lightnings Appear

When faced with an unfamiliar symbol on the screen, many Xiaomi Redmi owners make mistakes that can make the problem worse or even make the smartphone down.

• ❌ Use left-hand chargers with a declared power of 100+ V. Such units often fall short of standards and can damage the power controller. Xiaomi recommends using only certified accessories.
• ❌ Ignore overheating. If the smartphone case heats up to 50°C and above, immediately disconnect it from charging. Prolonged overheating shortens battery life.
• ❌ Resetting to factory without diagnosis is an extreme measure that rarely helps with charging problems, but erases all data.
• ❌ Charge your smartphone in a case at high temperature, and cases made of silicone or plastic degrade the heat sink, which can cause the protection to go off and double lightning to act as warnings.

Another common mistake is using damaged cables, where if the cable's wool cracks or the wires are exposed, it's not only a problem for charging, it's also dangerous (the risk of short circuits). Check the cable for damage every time you notice unstable lightning behavior on the screen.

Also, don't try to trick the system by connecting the smartphone to the charger via hubs or extension cords, which can lead to incorrect power determination and constant flashing of lightning. Always connect the charger directly.

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If the double lightning strikes after a smartphone falls or moisture hits, immediately disconnect it from charging and contact the service.This could be a sign of damage to the power controller or battery.

Software and hardware solutions: how to remove double lightning, if it interferes

If the double lightning doesn't disappear and is accompanied by slow charging, try the following methods: Start with the software methods - they are safe and do not require disassembly of the device.

1. Turn off fast charging in the settings. On some Redmi models, you can manually limit the charging power:

Settings → Battery → Charging settings → Disable “Fast Charging”

After that, the lightning should disappear, but the charging will go slower.

2. Update the drivers of the power controller. If the smartphone does not correctly determine the power supply, it will help to flash the drivers.

1. Download the latest firmware version for your model from the official Xiaomi website.
2. Go to Settings → About Phone → System Update → Three Dots (menu) → Select a firmware file.
3. Select the downloaded file and wait for the update to complete.

3. Check the battery for wear. If the battery is worn out (capacity below 70%), the power controller may not work smoothly. You can check the battery status on the AccuBattery app or through the engineering menu (enter code ##4636## and select Battery Information).

4. Reset your energy saving settings. Charge saving or Super saving modes may conflict with fast charging. Turn them off in Settings → Battery → Power saving modes.

If the software methods didn’t help, the problem could be in the hardware:

• 🔧 The connector is damaged. USB-C. Requires a replacement port (cost – from 1000 rubles).
• 🔋 Battery is out of order. Battery needs to be replaced (the original costs 1500-3,000 rubles).
• 🔌 The power controller is defective, and repairs will cost between 2000 and 5000 rubles, depending on the model.

⚠️ Warning: If the double lightning continues to flash after replacing the battery or controller, this may indicate a motherboard problem.In this case, repairs may not be cost-effective (especially for low-end Redmi models).

FAQ: Answers to Frequent Questions About Double Lightning on Xiaomi Redmi