The DJI 100W USB-C Power Adapter is required when using the charging hub to charge Intelligent Flight Batteries The charging hub is only compatible with the BPX345-6741-14.76 Intelligent Flight Battery. DO NOT use the charging hub with other battery models Place the charging hub on a flat and stable surface when in use. Make sure the device is properly insulated to prevent fire hazards DO NOT attempt to touch the metal terminals on the battery ports. Clean the metal terminals on the battery case with a clean, dry cloth if there is any noticeable buildup DJI Matrice 4 Series Charging Hub is designed for use with Matrice 4 Intelligent Flight Batteries. It can charge up to four Intelligent Flight Batteries in sequence from high to low power level. The battery charging hub supports both Standard Mode and Ready-to-Fly Mode. Standard Mode charges each battery to 100% sequentially. Ready-to-Fly Mode charges each battery to 90% sequentially and maintains that level for quick deployment. Featur