USB-C and the new MacBook Pro's

I have some questions about Anker batteries and USB-C. I have amassed many Anker batteries over the years, not only ones with USB-C. If I use a USB-C to USB3.0 or 2.0 cord and connect that to an Anker battery will that charge my new MacBook.

Are there minimum power requirements?

good question, the thing is, I do not have an answer for you!