Hey all! I have a quick question about a phone charger (and my phone). I have a Galaxy S10e, which is capable of wireless charging at up to 15 watts.

I have a Belkin wireless charger with these specs:

Input: 5v = 2A Output 5w

Input: 9v = 2A Output 7.5w

Input: 12v = 1.5A Output 10w

Input: 12v = 2A Output 15w

I have a charging brick with these specs:

Heyday USB-C Charging Kit

4 amp / 23 watt (charger)

DC 5v / 3 amp (USB-C to USB-C cable)

Soooooooooo since volts * amps = watts,

1. Since the cable is 5v / 3 amp (15 watts), this should be sufficient enough?
2. The charging brick is 23 watts, but the wireless charging pad requires 12v & 2a (24 watts) to achieve an output of 15 watts. Does that mean I won't get the full 15 watts with this charging brick?
3. I'm kind of confused - why does the wireless charging pad's input requires a higher watt to achieve a lower output wattage (ie input: 12v * 2a = 24 watts, to achieve 15w output)?

Sorry for the lengthy post. Thanks!!