Xiaomi made a significant leap in power consumption in 2021, and while the option of wireless charging was previously reserved for premium versions, this year it began to appear in mid- and sub-flagship models. Users often wonder which smartphones support the Qi standard, so as not to overpay for unnecessary features or, conversely, to get the desired comfort.
As we look at the range, it’s important to understand that having a magnetic coil inside the case is not just a marketing move, but a major change in the architecture of the battery and the back of the device. In 2021, engineers learned to embed charging modules even in plastic-backed devices, although glass and ceramics remain the preferred materials for efficient power transfer. Choosing the right smartphone becomes a task with many variables where every detail matters.
In this article, we will take a closer look at which Xiaomi and Redmi models received wireless charging support from 2021, learn about speed modes, reverse power transmission features, and understand whether to chase maximum watts or enough basic functionality for everyday use.
The flagship series Mi 11: the benchmark of speed
The Mi 11, the flagship lineup that has been a real technological breakthrough for the brand, opens the list: The base model, as well as the Pro and Ultra versions, have received support for ultra-fast wireless charging of up to 50 watts using a proprietary docking station. This allows a 4600 mAh battery to be replenished in just 45-50 minutes, a phenomenal indicator for the induction method.
The Mi 11 Ultra version, which features a second screen in the camera module and a ceramic back panel, plays a key role here, as it conducts heat better and does not create the shielding effect typical of metal. Having two batteries in some configurations allows you to distribute the heat load more evenly, which is critical at high charge rates.
⚠️ Note: To achieve the stated speed in 50 WW must use the original docking station Xiaomi and power supply with protocol support 120W HyperCharge. standard Qi chargers will limit power to 15-20 Watt.
All models in the series also support reverse charging of other gadgets, such as Mi True Wireless headphones or smartwatches, making the smartphone a full power bank that can help in an emergency. Engineers have also implemented an intelligent cooling system that regulates current depending on the temperature of the case.
Technical details of the Snapdragon 888 chipset
Xiaomi 12 and 12 Pro Series: compactness and power
At the end of 2021, the Xiaomi 12 series was introduced, which continued the tradition of its predecessors, but with a focus on ergonomics. Xiaomi 12 and 12 Pro models retained support for fast wireless charging, but in the base model, the power was slightly reduced compared to the Mi 11 for the sake of reducing dimensions.
An important feature of this lineup was an improved heat sink system. As the devices became more compact, engineers had to redesign the internal layout, the graphene layer and the new system of heat pipes allow you to maintain peak charge power longer without trottling (decreased speed due to overheating).
Users should note that the global versions may differ: sometimes there is no power supply in the box, but support for Xiaomi Turbo Charge technology remains at the software level, which means that you can buy a compatible device separately and get full functionality.
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When buying a case for Xiaomi 12 Series, make sure it is labeled "Wireless Charging Friendly." Too thick or metal inserts can block the signal or cause overheating.
Subflagships and the middle segment: technology availability
2021 saw wireless charging begin to descend into more affordable price segments, with the Xiaomi Mi 11 Lite series being a prime example, but there’s a big caveat: not all lights have this feature, and Qi is usually only available in 5G versions and only in certain regions, requiring careful specification study before buying.
At the same time, the Redmi brand has also experimented with the technology, and although there has been no mass transition to wireless charging in the budget segment, individual models of the Redmi K40 Pro+ series (known globally as the Mi 11i) have received full support for the standard, making them a unique offering for those looking for a balance between performance and price.
It is worth noting that in the middle segment, a slower version of the protocol is often used - 15 W or 20 W. This is due to restrictions on heat sink in plastic cases and the desire of manufacturers not to increase the final cost of the device, but even 15 W is enough for comfortable use of a smartphone in night mode or office work.
- 🔋 Speed: In the middle segment, the speed rarely exceeds 20-30 That is a compromise for the price.
- 📱 Materials: Glass is often used instead of ceramics, which slightly increases the risk of overheating during prolonged charging.
- 💰 Price: Availability of wireless charging in 2021 The year adds to the cost of the device approximately 15-20% compared to its peers without it.
Technical nuances and compatibility of standards
When choosing a smartphone, it is important to understand the standards. The main standard is Qi (pronounced "qi"), which is supported by most modern devices. However, Xiaomi has implemented its own proprietary extensions that allow you to reach 50 watts and above. Without a branded docking station, the smartphone will automatically switch to standard Qi mode, limiting power to 15 watts (or less, depending on the charger).
There is also the concept of reverse charging, which allows you to charge other devices just by putting them on the back of your smartphone, which in 2021 became more stable and stopped draining the main battery so much by optimizing the algorithms of the power controller.
It is important to understand the difference between "support" and "implementation." A smartphone may have a coil, but if the software is not set up to work with high currents, or if there is no appropriate cooling system, the speed will be artificially slowed to avoid damaging the lithium polymer battery.
Comparative Characteristics Table
For convenience, we have prepared a summary table of the main models of 2021 that support wireless charging, which shows the declared power and implementation features of the technology in each particular device.
| Smartphone model | Max. wireless power | Reversible charging | Case material |
|---|---|---|---|
| Xiaomi Mi 11 | 50 W. | Got 10 watts. | Glass/Eco-skin |
| Xiaomi Mi 11 Pro/Ultra | 50 W. | Got 10 watts. | Ceramics |
| Xiaomi 12 | 50 W. | There is. | Glass/Eco-skin |
| Xiaomi 12 Pro | 50 W. | There is. | Glass. |
| Redmi K40 Pro+ | 30 W (stated) | No. | Glass. |
As you can see from the table, the flagship models are almost equal in capabilities. The only difference is in materials that indirectly affect cooling efficiency. The ceramics in the Mi 11 Ultra is the best heat conductor among the materials used, which theoretically allows you to maintain peak power a little longer.
Challenges and limitations of technology in 2021
Despite the progress, users may face a number of limitations: first, wireless transmission efficiency is always lower than wired power, some of the energy (about 20-30%) is lost as heat, which means that the efficiency of the process is lower and the heating of the device is higher, which can be critical in summer or in hot climates.
Second, the presence of a case: Thick protective glass, metal-plated or magnetic-holder covers can completely block charging or cause errors. In 2021, many users complained of spontaneously turning off charging due to overheating if the phone was lying on the charging panel in direct sunlight.
⚠️ Warning: Do not cover your smartphone with a cloth or blanket while wirelessly charging. Lack of air circulation can lead to critical overheating and protection, or, in rare cases, to battery bloating.
Also worth mentioning is the positioning problem: If the center of the smartphone coil doesn’t match the center of the charger coil, efficiency drops and heat rises. In more expensive 2021 models, they started to introduce systems with double coils or increased area to minimize this effect.
☑️ Checking before buying wireless charging
Final selection recommendations
When you choose Xiaomi with wireless charging in 2021, you get a device that combines advanced technology and usability. If you care about top speed, you should look at the Mi 11 or Xiaomi 12 Pro series. For those looking for balance, subflagships will do, but you need to be prepared for a lower charge speed.
Remember, to realize its full potential, you need infrastructure: an original docking station and a powerful power supply. Without it, you will only get rid of the wires, not speed. In 2021, only models with Snapdragon 8-series processors could fully realize the potential of 50-watt charging without overheating.
Technology has become the de facto standard for the flagship segment, and the lack of it in an expensive smartphone is now more the exception than the rule. Buying a device from the list above, you invest in comfort for several years ahead, as the compatibility of the Qi standard guarantees work with any future chargers.
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The main conclusion: Wireless charging in 2021 has moved from the category of “nice little things” to the status of a mandatory attribute of the flagship, providing a speed comparable to wired analogues of previous years.
Hopefully, this review has helped you understand the range and technical features, and choosing the right smartphone will make your life more comfortable, eliminating the need to constantly search for a cable or worry about a discharged battery at the most inopportune time.