Small and easy to carry, the Battery Charging Hub for the DJI Phantom 3 enables you to charge up to four Phantom 3 Intelligent Flight Batteries. 
When used, the Charging Hub automatically selects the individual battery with the highest amount of remaining power, and charges it until full before moving on to the next battery. 
The entire process is monitored and each battery’s status is shown using LED indicators, making the charging process simple and easy.