Do u have any clue is whats going on?

[AC Question]

My power bank is not charging my SG phone but when I charge my power bank it lights up. when it turn blue I plug the power bank into my SG phone and its not charging I don't know why.

 

[B. Diddy]

Welcome to Android Central! Are you using the same cable to connect the powerbank to the phone that you used to plug the powerbank into the power outlet? Just want to make sure the cable isn't the issue.