Turns out my 2013 MBP delivers 2.1 amps (10.5 Watts) while the iPhone 6 charger is the same as the iPhone 3G charger at 1 amp (5 W). However, the difference is only 13 minutes. Blog post. Anyone want ...

There are plenty of old iPhone wall chargers still out there very slowly powering up handsets. Fortunately, iOS 18.2 made it quick and easy to tell if it’s time to trash your old, slow iPhone charger.