DJI have finally released the advanced charging hub for the Mavic. If you remember way back when the Mavic was announced, DJI made reference to it being able to charge four Mavic batteries at the same time. But what was available at the time was the standard one that did just one battery at a time.
This new hub charges all the batteries at the same time and when combined with the Phantom 4 Pro charge brick, can charge all 4 batteries in 2 hrs 30 mins ( 4 hrs 10 mins with the standard Mavic charge brick or 3 hrs 15 mins using the Mavic car charger ).
Buy the advanced hub direct from DJI here – http://store.dji.com/product/mavic-battery-charging-hub-advanced
Buy the Phantom 4 Pro charge brick from them too here ( not required, an option ) – http://store.dji.com/product/phantom-4-100w-power-adaptor-without-ac-cable