The Battery Charging Hub for Mavic Pro from DJI is designed for use with the Mavic Intelligent Flight Battery. When used with the separately available Mavic Battery Charger and Power Bank Adapter, it can charge up to four Intelligent Flight Batteries. The Intelligent Flight Batteries will be charged in sequence according to their power levels, from high to low.
Note: Requires separately available Power Bank Adapter to connect to the Mavic Charger.
I do not need it anymore
This works great. The only thing it requires is the charger that comes with the Mavic Pro. The included Mavic charger's battery connection plugs into the bottom of this unit, then you can connect up to 4 batteries around the four sides of the top. I played it safe and bought only DJI-brand equipment to charge my Mavic batteries, instead of trying any third party hardware. The only down-side to this solution is that it only charges one battery at a time. This isn't a problem for me, I just connect all the batteries, then it automatically moves through and you see one at a time light up and recharge until it charges them all. But since other companies make 5 in 1 Mavic chargers that charge 3 Mavic batteries plus your remote control and your phone all in parallel, this does seem a bit slower if you ever needed multiple batteries recharged in a hurry.