DJI Mavic PART 07 Battery Charging Hub
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This device connects multiple Mavic aircraft batteries to either the standard AC adapter charger or the optional 12V DC car charger. Charging times will increase if all batteries connected are depleted to their minimum voltage, it can't increase the output power of the charger. But, if cycling through batteries flight after flight connecting a depleted battery while another is just finishing it's charge process does reduce overall wait time.