Wireless charging on Xiaomi Mi 9T: how to turn on and configure correctly

Introduction: Myths and Reality about Mi 9T Wireless Charging

The Xiaomi Mi 9T (also known as the Redmi K20 in some regions) is a popular smartphone with powerful stuffing and stylish design. However, the issue of wireless charging support is controversial. Unlike the flagship Xiaomi Mi 9 or Mi 10 models, where this feature is implemented out of the box, the Mi 9T does not officially support the Qi standard - but this does not mean that a solution is impossible.

In this article, we will look at all the available ways to activate wireless charging, from the use of adapters to software tricks. It is important to understand that the Mi 9T does not have a built-in coil for wireless charging, so any methods require additional accessories or modifications. We will analyze the pros and cons of each approach, as well as give recommendations for choosing equipment to avoid battery damage or overheating of the device.

If you're willing to sacrifice the original back cover for convenience, read on. If you prefer to keep your smartphone in factory condition, we'll offer alternative solutions without physical changes.

Why does the Mi 9T not support wireless charging out of the box?

The design features of the Xiaomi Mi 9T explain the lack of wireless charging:

• 🔋 Body thickness: The smartphone has a retractable front camera, which limits the interior space to accommodate the Qi coil.
• 💰 Pricing policy: Mi 9T It was positioned as a mid-range device, where wireless charging was considered a "premium" feature.
• 🔌 Fast wired charging priority: The model supports Quick Charge 4+ (18W), which compensates for the lack of wireless options.

However, accessories manufacturers have found workarounds, such as thin receivers that stick under the back cover, or cases with an integrated coil, but this raises the question of compatibility: not all adapters work consistently with MIUI, especially on older versions of firmware.

⚠️ Note: Using uncertified adapters can cause the battery to overheat or wear the battery faster.Before buying, check the reviews of a particular model on the forums 4PDA or XDA Developers.

Method 1: Wireless charging case – a simple solution

The safest and most reversible method is to use a case with a built-in Qi coil. These accessories connect to the USB-C connector and transfer power to the smartphone through contacts, while maintaining wireless charging.

The following are the Mi 9T models:

How to use:

1. Put the case on your smartphone by connecting the USB-C plug to the connector.
2. Place the device on a wireless charging station (compatible with Qi).
3. Wait for the charging indicator to appear on the screen.

⚠️ Warning: Coil covers block access to the connector USB-C. If you need to connect headphones or cable, the case will have to be temporarily removed.

Method 2: Built-in Receiving Module for Advanced Users

If the cases seem uncomfortable, you can install a thin receiver module under the back cover, a technique that requires disassembling the smartphone but provides a more "native" wireless charging experience.

What you need:

• 🛠️ Receiving module Qi (e.g. Yootop Wireless Receiver).
• 🔧 Set of screwdrivers for parsing Xiaomi (star) T3, spatula).
• 🔥 A dryer to soften the glue (or a mediator to gently open the cover).
• 📏 Double-sided tape or glue for fixing the module.

Step-by-step:

Backup your data (setup → Additional → Backup)|

Turn off your smartphone and remove it. SIM-map|

Prepare the workplace (soft surface, good lighting) |

Check the completeness of the module (coil, connector, glue)

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1. Carefully tuck the back cover of your smartphone, starting at the bottom edge. Use the mediator to avoid damaging the plumes.
2. Disconnect the battery (required!) by turning off the power plume. This will prevent short circuit.
3. Stick the Qi receiver to the inside of the lid, aligning it in the center. The module connector should match the charging connector.
4. Connect the module to the USB-C connector (a soldering iron may be required for secure fixation).
5. Collect the smartphone in reverse order, making sure that all the plumes are connected correctly.

After assembly, check the performance:

1. Place your smartphone at the charging station.


2. The charging icon should appear on the screen (if not, check the module connection).




3. Make sure that the smartphone does not overheat (normal temperature - up to 40 ° C).

⚠️ Warning: Installation of the module may damage the power controller. If the smartphone does not turn on after assembly, contact the service center.

Method 3: Software activation (only for power users)

There's a myth that you can turn wireless charging on through an engineering menu or a modified firmware. It's not quite true: without a physical Qi coil, software methods are useless. However, if you've already installed a module but your smartphone doesn't recognize it, you can try the following steps:

Instructions for users with unlocked bootloader and TWRP:

1. Install a Qi-enabled custom core (e.g. FrancoKernel for Mi 9T).
2. Edit the file. /system/etc/wireless_charger.conf (If it exists, add the line: ro.wireless.charging.supported=1
3. Restart the device and check for the option in Settings → Battery.

For most users, this method is not recommended because:

• 🚫 Requires deep knowledge in Android firmware.
• 🚫 It may cause a device to break down.
• 🚫 Cancellation of the warranty (if it is still valid).

💡

Before experimenting with firmware, check the kernel compatibility with your version of MIUI on the XDA Developers forum. Some cores only run Android 10, not Android 11+.

How to choose a charging station for Mi 9T?

Even if you set up wireless charging, the quality of the charger depends on the charger.

Popular models of charging stations:

• 🔌 Xiaomi Wireless Charging Pad (20W) – Optimal for the Mi ecosystem.
• 🔌 Anker PowerWave 10 is universal, with overheating protection.
• 🔌 Belkin Boost Up (15W) – supports vertical charging.

Important: Avoid cheap no-name stations. They are often uncertified and can damage the battery. Check for the Qi logo on the package.

💡

Use Qi-certified charging stations to ensure compatibility and safety for your Mi 9T.

Frequent problems and their solutions

Even after successfully setting up wireless charging, users are faced with difficulties.

Problem 1: The smartphone is not charging wirelessly

• 🔍 Check if the module/case is properly installed (contacts should fit tightly).
• 🔍 Try another charging station (possibly incompatible with current one).
• 🔍 Update the firmware -- in MIUI 12.5+ Improved support for external accessories.

Problem 2: Wireless charging is slow

• ⚡ Make sure the station supports Quick Charge (e.g. Xiaomi) 20W Wireless Charger).
• ⚡ Close background applications – they can limit charging current.
• ⚡ Remove the thick cover – it can block the signal.

Problem 3: The smartphone is overheating

• 🌡️ Use a fan station or take breaks every 30 minutes.
• 🌡️ Do not charge the device under direct sunlight.
• 🌡️ Check if the Qi module covers the vents.

If the problem persists, go back to the wired charging or go to a service center, and the adapter may be damaged or incompatible with your model.

Alternatives to wireless charging for the Mi 9T

If the modifications seem too risky, consider alternative ways to charge easily:

• 🔋 Power Bank with magnetic mount: For example, Xiaomi Mi Power Bank 3 with holder. Allows you to charge your smartphone “on the go” without wires.
• 🔌 Ultra-thin cables: Cables USB-C 1 mm thick (for example, from Baseus) almost do not interfere with everyday use.
• ⚡ Fast wired charging: Mi 9T Supports Quick Charge 4+ (18W), which charges the battery by 50% in 30 minutes.

The advantage of these methods is that they maintain a warranty and do not risk damaging the smartphone, and they are often cheaper than buying cases or modules for wireless charging.

If you are fundamentally important wireless charging, consider buying a new smartphone with support for Qi out of the box, for example, Xiaomi Mi 11 or Redmi Note 12 Pro+.

FAQ: Answers to popular questions