Ideal for long flights, the Battery Charging Hub for Air 2S & Mavic Air 2 Flight Batteries from DJI is capable of charging up to three flight batteries. When charging multiple batteries, the charging hub does so intelligently and efficiently. It charges batteries in sequence based on their remaining power levels rather than simultaneously. Batteries with the most power are prioritized to recharge first. This effectively provides the maximum power available to give pilots fully charged batteries as fast as possible. Please note that this does not include a power supply/charger, which is required to provide power to the charging hub.