The DJI BS30 Charging case is designed to charge 8 TB30 batteries for the DJI Matrice 30 and the DJI Matrice 30T. The charging case also contains 2 WB37 charging slots. With a USBA, USBC, and maintenance port, the BS30 can charge your controller or other devices and connect to the RC Plus for firmware updates. Keep in mind you can update all of your batteries at once through the BS30 charging case.