Power bank

Hello,

I am in the market for a reliable verified power bank that can be ordered online. I have my eyes on the xiaomi pro 10000 mAh, but I don't know too much about the brand so I am not sure. If you can suggest some that you use with your Nexus 5x, I would really appreciate it. (I don't need more than 10000mAh) Also, USB A or USB C?

Thanks a bunch