Does a charge cord come with the charging hub or will it take the same cord I use with my Phantom 3 Professional? Doesn't say in the description of the charger...jp

My understanding of its operation is to plug the hub into the charger you already have -- the batteries then go into the hub.  The manual can be found here:  
http://dl.djicdn.com/downloads/phantom_3/en/Phantom_3_Charging_Hub_User_Manual_en.pdf