DJI - Mavic Air 2 Battery Charging Hub When connected to a Mavic Air 2 charger or car charger, the Mavic Air 2 Battery Charging Hub can be expanded to charge three additional batteries.It is designed for use with the Mavic Air 2 Intelligent Flight Battery.The battery charging hub enhances efficiency by charging batteries in sequence according to their remaining power level, with more fully-charged batteries receiving power first. Features: Charge 3 batteries in sequenceCompact and portable Specifications: Charging Temperature: 5° to 40 °CInput: 8.4-13.2 V, 2.82 AOutput: 8.4-13.2 V, 2.82 ACharging Time: About 1 hour and 40 minutes (subject to temperature)EU Powerplug