Sorry if this not right place, please put this theme in right place if i not. This i gen 2 10.000 mAh power bank. But i dont know is this original. I power my xiaomi note 3 pro (4000 mAh), from 0 to 100 one time, and from 0 to 20 second time. It needs a couple of hours to power up itself. Can you tell me, what is button functions? Is this to low for 10.000 power bank? The code on the box is ok on xiaomi site, but the code on prospect is different. I put some images and i hope for answer. Sorry for my bad english and thank you my friends.