Originally Posted by
smc333
I believe it uses around 19-20w from 0-10%, then drops down to something a bit lower from 10%-66%, the finishes off at a yet lower rate. I don't remember what the second two rates are, but I'm pretty sure it starts at 19 to 20 when you're battery is dead or very low.
Ah, interesting. USB-PD fast charging was introduced with the iPhone 8. I had no idea.