According to my understanding, the current mainstream wireless fast charging protocols include Qi (odd) wireless charging standard and PMA (Power Matters Alliance) wireless charging standard. Among them, the Qi wireless charging standard is one of the most widely used standards.
For the Qi wireless charging standard, it supports a variety of power output levels, including 5 watts, 7.5 watts, 10 watts and 15 watts. Therefore, if your device supports a 15 watt wireless fast charge protocol, then using a 15 watt charger should be sufficient.
It should be noted that the specific charging speed and effect are also limited by the device itself. Some devices may require a specific charger or charging dock for the fastest wireless charging speeds. Therefore, it is recommended that you consult the manual of your device or contact the device manufacturer for detailed information on charging power and compatibility.
1: Not enough.
Reason: Because the 15 watt charging speed of the 6 Wireless Fast Charging protocol is relatively slow.
Extension: At present, there are already higher power wireless fast charge protocols on the market, such as 30 watts, 40 watts or even higher power charging methods, which are faster than 15 watts of charging, and can improve charging efficiency more effectively.
Therefore, if you want to achieve faster charging, you can consider choosing a higher power wireless fast charge protocol.