Crazepony 3in1 Balance Battery Charger for Parrot Bebop Drone 3.0 3 batteries can be charged at the same time, every charging port works individually and safely,to save charging time. Good protection to your batteries: balance the voltage, prevent over-voltage and reduce insufficient charging of old battery, reduce the damage to the cells. Charging time: almost 70mins for either 1 or 3 batteries With indicator light to show the charging status (charging: red light; fully charged: green light; battery maintaining: blinking light).