Can be charged.
The iPad charger can be used to charge not only iphones, but also iPods, Apple Watches, and AirPods. And charging speed is faster than the built-in 5W power adapter.
Even Mac laptop power adapters can charge ipads, iphones, iPods, Apple Watches, AirPods.
I often use the power adapter of the 2018 MacBook Pro to reload my iPad Pro and iPhone.
Because the power adapters for Mac laptops and ipads are backward compatible with the iPhone's Apple 2.4A charging protocol,
For example, the Mac notebook power adapter supports 20.3V\/3A, 15V\/3A, 9V\/3A, 5.2V\/3A input gear, which is compatible with most Apple devices.
The new iPad Pro is a USB-C port, so
you can also charge the iPad Pro directly with the Mac laptop charging cable.
In addition to charging your phone or iPad with a power adapter, you can also charge your iPad or iPhone directly from your Mac laptop
Charge your iPhone with your iPad
Even some Android phones with USB-C ports can charge the iPhone (like the Google Pixel 2 below).
And this is all thanks to USB-C support for two-way output charging.
Because iphones and older ipads still use Lightning ports, you'll need a USB-C to Lightning cable, or USB-C adapter. I used Apple's official USB-C to Lightning cable. Now Apple certified third party C2L line has also come out, the price is not expensive.
Of course, it's not up to me to fill it. Apple has also made an official explanation. And many people at home and abroad have done the evaluation. Safe and rechargeable.
When you Go out later, bring a charger to charge your iPhone, iPad Pro, MacBook Pro, Switch game console, Go Pro camera, and fast charge. Of course, you might want to bring extra wire.