What is USB Type-C ?   I think you have known the Micro USB connector, for its most widely using.   And if you have any iphone , you must know the Lightning connector.   And now, what is USB Type-C ? it seems appear everywhere in the electronic devices....

 What is PD?   My friends, if you search “Power bank” on Amazon, you will Probably find many listings have “PD” on headline, on pictures, and on anywhere.   So, what is PD?   PD sands for Power Delivery, which is a relatively new fast charge standard which was...