We don't typically advise using any power adapter other than the one shipped with your device, but with us being such generous tech wizards, we will let you in on a little secret.
If you own both an iPhone and an iPad, you can use your iPad USB wall charger to juice up your iPhone significantly faster. Especially useful when you forget to charge your phone overnight and need to revive it within the speed of light... not really, but you get the point. What makes the iPad charger better, you might ask? Well the iPad’s charging component has a notably higher voltage that can trickle charge your device up to twice as fast without any damage to your iPhone. Pretty awesome if you ask us.
If you don't have an iPad but are in the market for an additional charger, don't fret. You can purchase the iPad charger at the same price as the iPhone charger, in the Apple store. If you however opt for a third-party charger, be careful to read the manual or contact their customer support and confirm compatibility. This way, you won't risk frying your iPhone. You're welcome.