Wireless charging is still a feature that is only limited to select premium smartphones. Wireless charging works via electromagnetic fields that transfer power to a smartphone using a charging pad. The charging pad powers a device via built-in receiver or coil that is usually placed on the back of the device. When the receiver coil in the smartphone comes close to the transmitter coil in the charging pad, the magnetic field induces an electric current in the receiver coil through a process called inductive coupling. The electric current is then converted from AC to direct current (DC) by the device's circuitry. This DC power is what charges your device wirelessly. Now, while it is a premium feature, some flagships today skip wireless charging in order to keep the prices in check. However, it is pretty much a rule that the most premium flagships in the market will come with wireless charging support, but with varied speeds. For example, the Apple iPhone 14 Pro Max maxes out at 15W wireless charging, but some smartphones like the OnePlus 10 Pro or the Xiaomi 13 Pro can charge at a speed of up to 50W wirelessly.