Apple USB-A to lightning Original Cable Box Pulled
For iPhone 6,7,8,8+. iPhone, X, XS, XS MAX, XR
Apple iPhone lightning to USB–A
notice that as on most phones, the last few percentage points were the slowest to charge and you have to wait for much longer for the last percent to charge up.
Overall, while the iPhone is definitely not the fastest charging phone on the block, they have definitely improved a great deal and now you can top them up for a quick 15 or 30 minutes if you have forgotten to charge it overnight and not worry about it.