Small and easy to carry, the Inspire 1 Battery Charging Hub enables you to charge up to four Inspire 1 Intelligent Flight Batteries. When used, the charging hub automatically selects the individual battery with the highest amount of remaining power, and charges it until full before moving on to the next battery. The entire process is monitored and each battery’s status is shown using LED indicators, making the charging process simple and easy. Used together with the Inspire 1 charger and cord. Compatible with TB47 and TB48 battery models.