Now that Apple doesn't ship a charger with the iPhone -- a move Apple claims helps the planet, but I'm sure also helps Apple's bottom line -- it's up to you to grab a charger to do the job.
And I've found the perfect charger.
The tinyAnker Nano Pro .
Note that the version I'm testing is the UK version, featuring the very beefy UK plug prongs.
The Nano Pro ticks all the boxes in what I want from an iPhone charger:
Specs