Wireless charging technology does have a certain loss in charging speed compared to traditional wired charging technology, but this loss is not very large. The charging speed of a wireless charger depends on many factors, such as the power of the charger, the power of the charging device, the size of the battery, and so on. In general, the charging speed of wireless chargers will be slightly slower than that of wired chargers, but this gap is not obvious, and the convenience and comfort of wireless charging can also make up for this gap.
The voltage of the wireless charger will not be too stable, and the voltage to be generated will be smaller with the transmission distance, the current will be small, and the charging will be slow.