The Dji Battery Charging Hub For Phantom 3 Quadcopter Is A Small And Easy To Carry. The Charging Hub Enables You To Charge Up To Four Phantom 3 Intelligent Flight Batteries. It Starts By Topping Off The Battery With The Greatest Charge, And Then Progresses To The Next Most Charged Battery, And So On. The Entire Process Is Monitored And Each Battery'S Status Is Shown Using Led Indicators.Features: Intelligent Charging Management, Capable Of Automatically Charging Up To Four Batterieseach Battery'S Status Is Shown Using Led Indicatorssmall And Easy To Carryinternal Power Management Ensures Safety At All Timesintegrated Port Enables Future Firmware Updatescompatible With The Phantom 3 Series Charger