Charge More At Once The Inspire 2 Intelligent Flight Battery Charging Hub is designed for use with the Inspire 2 Battery Charger. It charges up to four Intelligent Flight Batteries simultaneously. The battery pair* with more stored power will be charged first. The Charging Hub will intelligently charge batteries in sequence according to battery power levels from high to low if batteries are not paired. Pairing can be carried out using the DJI GO app. The Micro USB (Universal Serial Bus) port is used for firmware updates.* Visit the Official DJI website & download the Inspire 2 User Manual for more information on how to pair batteries using the DJI GO app. Specifications. Compatible with the Inspire 2 180W battery charger For use with Inspire 2 TB50-4280m Ah-22.8V Intelligent Flight Battery Operating Temperature 41°to 104° F (5° to 40°C) Input voltage 26.1 V Input current 6.9 A Weight 253g Charging Time (Two batteries) 90 minutes Charging Time (Four batteries) 180 minutes..