This DJI Charging Hub is designed for use with the Inspire 2 battery charger. It charges up to four Intelligent Flight Batteries simultaneously.<br/> <br/> If batteries are not paired, the Charging Hub will intelligently charge batteries according to power levels from high to low. If batteries are paired, the pair with more stored power will charge first.<br/> <br/> Note: The hub's built-in micro-USB port is for firmware updates only.