A Xiaomi SU7 user has recently asked the company why the 50W wireless charging of the car occasionally feels slow. An official has responded to his question.

The Xiaomi SU7 offers a wireless charging pad that is rated at 50W. However, according to the company’s official, the actual charging speed depends on a number of factors such as compatibility with phone models and the status of the phone during charging.

Only 15W for devices with Qi charging protocol while Xiaomi devices can reach 50W

This may include factors such as the temperature, and an ongoing background process among other things. And this is also applicable to the phone’s own charging system as well.

Speaking of the wireless charging system that SU7 offers, it supports Qi and Xiaomi’s proprietary wireless charging protocol. Not to mention the phone will need to support one of these two in the first place, and will also need to support 50W wireless charging.

Xiaomi devices with support for 50W wireless charging and its proprietary charging protocol can reportedly obtain a maximum charging power of 50W on the Xiaomi SU7 wireless charging pad. However, he noted that the Xiaomi 13 Pro uses a smaller coil and can reach 30W of wireless charging on the SU7’s wireless charging pad.

He added that other Android devices use the Qi protocol for wireless charging and the SU7 offers only 15W wireless charging speed with it. As Apple devices use a specific frequency band of the Q protocol, SU7 can only offer a charging speed of 7.5W.

An inappropriate placement of the phone in the charging pad where the charging coils are not placed directly on top of each other will also hinder the energy transmission and the charging speed regardless of phone brands/models, and charging protocols. This particular condition is also appropriate for every wireless charging system.

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