Magic keyboard, Magic Trackpad 2 and Magic Mouse 2 all need lightning....

[WolfSnap]

Guess that means I *need* a USB-c to lightning cable.

Really should have come with one....

 

[JTToft]

Or you need a USB-A adaptor.

 

[Gregintosh]

You can pair wirelessly, and you can charge them using your iPhone or iPad charger when they're not in use. They charge fully within an hour or two and last about a month (maybe longer).