The DJI Mavic Mini Two-Way Charging Hub intelligently charges up to three Mavic Mini batteries in sequence. The Intelligent Flight Battery with the highest power level will be fully charged first. Other batteries will be charged in the same manner, according to their power levels. Charge three MB2-2400mAh-7.2V packs in 4.5 hours to charge all three packs. Charging three MB3-1100mAh-7.6V batteries, all three will charge in up to 2.5 hours.