HOBBYSUNRISC Rapid Battery Parallel Charging Charger Board 4 Ports for YUNEEC Q500 Quadcopter Rapid Multi-battery charger plate For YUNEEC Q500 Battery charging ONLY For protecting battery, suggest the current do not exceed 5A More quadcopter accseeory products are provided by Hobby-Ace on the Amazon.Bring your eyes into the sky and racing like a free bird, enjoy the ultimate first person view experience.