Charging UP AIR Remote Controller Battery: Only charging with upair official charger, please do not charge both the drone battery and RC battery at the same time 1 .Charge the RC battery by connecting the RC battery with the charger in corresponding plug. 2, When the charger indicators turn red,it indicates charging is in process,when turn green, it shows battery has been fully charged,while if the charger indicators blink red and green, showing maybe there are not in good contact between charger and battery. 3. Disconnected the RC battery with the charger when fully charged.