From the test results in the earlier link. I'm using a power bank capable of outputting 29W. But I'm only getting result near to 12W. I believe normal lightning + converter is the bottleneck. Still need USB-C to lightning to get full potential. However the difference between 29W and 12W is not night and day. So it's still cheaper to get maybe a better USB-C converter to pair with original lightning cable.

15 mins difference Only applies to full charge.

The selling point is actually fast charge. 30 mns 52%

After that slows down.

Good if ur battery depleted and need a fast charge. For everyday use I just use the free 5W charger and charge overnight.

I'm using hoda full coverage as well. A simple blow will clear off some of the dusts. Is the dust affecting the light sensor? If not then y bother? We should be looking at the nice screen. Not looking for dusts!!!