Wireless charging for Xiaomi phones: how it works, standards and secrets of efficiency

Wireless charging in Xiaomi smartphones is no longer exotic — it is now available even in the budget models of the Redmi line. But how exactly does this technology work? Why does one phone charge in 30 minutes and another in 2 hours? And why sometimes the device refuses to charge without a wire, although it supports the function? In this article, we will discuss the principle of wireless charging, the standards of Qi and Mi Wireless Charging, and also reveal nuances that are not written in the instructions.

If you think wireless charging is just "magic," you're wrong. It's got the complicated physics of electromagnetic induction behind it, and speed and efficiency depend on dozens of parameters: the distance between the coils and the material on the phone's body. We're not going to load you with formulas, but we're going to explain it so you can optimize charging and avoid the typical errors. For example, did you know that a case that is more than 3 mm thick can reduce charging power by 30 percent?

How wireless charging works: the physics of the process

The technology is based on electromagnetic induction, a phenomenon that Michael Faraday discovered back in 1831, where when an electric current passes through a coil in a charging station, a magnetic field forms around it, and this field in turn induces current in the receiving coil of a smartphone, in simple terms, energy is transmitted through the air without direct contact.

Key components of the system:

• 🔌 Transmitting coil - located in a charging station, converts electricity into a magnetic field.
• 📱 Receiving coil - built into the smartphone, captures the field and converts it back into current.
• 🔄 Controller – regulates power, prevents overheating and ensures compatibility with different devices.

It's important to understand that wireless charging isn't "true" wireless -- it just eliminates the cable between the phone and charging, but the station itself is still plugged in. The power transfer efficiency is lower than wired charging, up to 30 percent is lost as heat, which is why smartphones heat up more when wireless charging.

Xiaomi’s Wireless Charging Standards: Qi vs Mi Wireless Charging

Xiaomi smartphones support two main standards:

1. Qi (pronounced "chi") is a universal standard developed by the Wireless Power Consortium (WPC) supported by most modern smartphones, including the iPhone, Samsung and, of course, Xiaomi. The maximum power in the Qi standard is up to 15 watts, but the real speed depends on the phone model and charging.
2. Mi Wireless Charging is Xiaomi’s proprietary technology, optimized for flagship models (Mi 11 Ultra, Mi 12 Pro, Mi 13, etc.) and allows you to achieve power up to 50-67 watts using branded charging stations.

Let's compare the key characteristics:

Critical nuance: even if your Xiaomi supports Mi Wireless Charging, to achieve maximum power (for example, 67 watts), you need to use the original Xiaomi charging station. Charges from third-party manufacturers, even with Qi support, will limit power to 10-15 watts.

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If your Xiaomi supports Mi Wireless Charging but charges slowly, check the charging station model in the settings: go to Settings → Battery → Wireless Charging. It will show the current power and compatibility.

Which Xiaomi models support wireless charging?

Not all Xiaomi smartphones are wireless charging, and here is the current list of models with support for the technology (as of 2026):

• 📱 Flagships Mi: Mi 11 Ultra (67 Waht, Mi 12 Pro (50 Waht, Mi 13/13 Pro (50 Wh), Mi Mix 4 (50 Watt).
• 📱 The Redmi: Redmi series K50 Pro (30W), Redmi Note 12 Pro+ (30W), Redmi. K60 Pro (30 W).
• 📱 Folding devices: MIX Fold 2 (50 W), MIX Fold 3 (67 W).
• 📱 The Redmi Note 11 Pro is a model+ 5G (10 Watts), POCO F4 GT (10 Watts).

To check the wireless charging support in your model, do one of the following:

1. Check out the specifications on the official Xiaomi website (Battery section).
2. Enter the model name in the search engine with the request "wireless charging".
3. Try putting your phone on any Qi charge – if a charging indication appears, the function is supported.

Charging speed: why does Xiaomi charge slower than over the wire?

Even Xiaomi’s flagship models with support for 50-67 watts of wireless charging are losing to wired solutions in speed, for example, the Mi 13 Pro charges 120 watts over wire, and only 50 watts wirelessly.

• ⚡ Energy loss: up to 30% of power is lost when transmitted through a magnetic field (turned into heat).
• 🔥 Overheating. Wireless charging heats the battery more, so the controller artificially limits current.
• 📏 Distance between the coils. The further away the phone is from charging, the weaker the induction. Optimal distance is 1-3 mm.
• 🛡️ Security mechanisms: Qi protocol limits power for uncertified devices.

In practice, this means:

• 🔋 Xiaomi Mi 11 Ultra (67W) charges from 0 to 100% ~40 minutes on the wire and ~60 minutes wirelessly.
• 🔋 Redmi K50 Pro (30W) - for ~50 minutes on the wire and ~90 minutes wirelessly.

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Wireless charging is convenient for maintaining the charge level (for example, on the desktop), but for fast charging before leaving it is better to use a wire.

How to use wireless charging correctly: 7 tips for Xiaomi

To make the most of wireless charging, follow these guidelines:

Use the original Xiaomi charging station for flagships

Remove the thick cover (>3 mm thick)

Place the phone in the center of charging (mix the coils)

Avoid metal surfaces under charging

Do not use your phone while charging (heating!)

Update the firmware (new versions of MIUI optimize power consumption)

Check the temperature – if the case is hot, interrupt the charging-->

Pay special attention to the position of the phone. The coils in the smartphone and the charging station should be coaxial (situated opposite each other). In most Xiaomi models, the receiving coil is located in the upper third of the case (if you look at the screen), so place the phone so that the top part is above the charging center.

Another important thing is the temperature, because wireless charging heats the battery more than wired charging, if the phone is over 40.°C, the controller will automatically lower the power or turn off the charging:

• 🌡️ Charge your phone in a cool room (not in the sun or near heaters).
• 🧊 Remove the case if it insulates heat (such as silicone or lining).
• ❄️ For flagships with Mi Wireless Charging (such as Mi 13 Ultra), use active cooling charging stations (built-in fan).

⚠️ Warning: Do not put foreign metal objects (keys, coins, credit cards) on wireless charging; they can heat up and damage the coil or battery. In extreme cases, this leads to a fire.

Common Problems and Their Solutions

If your Xiaomi isn’t charging wirelessly, the reasons may be:

If the problem persists, reset the charging settings:

1. Go to Settings → Battery → Wireless charging.
2. Click Reset settings (if the option is available).
3. Reboot the phone.

⚠️ Attention: If the phone stopped charging wirelessly after a fall or impact, the receiving coil is likely damaged. Do not try to disassemble the device yourself - in Xiaomi, the coil is often glued to the body and connected to the motherboard with thin plumes. Unprofessional repairs can cause the phone to fail completely.

The Future of Wireless Charging: What Does Xiaomi Have in store?

Xiaomi is actively developing wireless charging technologies. In 2023, a prototype of remote charging (up to 5 meters) was presented, and in 2026 commercial solutions with a capacity of up to 80-100 watts are expected to be released.

• 🔋 Reverse wireless charging (when the phone can charge other devices, such as Xiaomi Buds headphones). MIX Fold 3.
• 🌍 Universal stations that can charge several devices at the same time (phone) + clockwork + headphones).
• ⚡ Ultra-fast charging – 200W solutions are being tested in Xiaomi laboratories, but their market entry is expected no earlier than 2026.

But the main problem remains efficiency. Today, up to 30 percent of the energy is lost in transmission, and engineers are looking for ways to reduce waste, and one promising area is resonance charging, which allows for the transmission of energy over long distances with less loss.

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